REGULATORY DOCKET FIIE - nrc.gov · greater than one plus the vertical coefficient (Fvertical = (Weight) (1 + gV), Fhorizontal = (Weight) (gh), gh > 1 + gv). The seismic analysis

IOWA ELECTRIC LIGHT AND POWER COMPANY

DUANE ARNOLD ENERGY CENTER

CALCULATION COVERSHEET

ANALYSISICALCULATION.NO: 14 A4-1 -

ANALYSIS/CALCULATION TITLE:

REFERENCE DOCUMENTS

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PF Background

The purpose for compiling calculations M84-11, 12, 13, 14, 15 was to

perform a seismic analysis on the critical components of the Hills-McCanna Pneumatic Damper Actuators. These actuators are part of the secondary

containment isolation system at the Duane Arnold Energy Center

On January 26, 1984, Iowa Electric notified the NRC by telephone that the above mentioned actuators were potentially deficient in meeting their purchase specification. A review of the documents relating to this .discrepancy revealed that the isolation damper assemblies were purchased originally as complete assemblies which included the damper actuators. Subsequent orders for "likefor-like" replacement actuators were placed directly with the actuator manufacturer who was a subvendor to the damper manufacturer. This most recent

purchase order for actuators revealed that a quality assurance program, as required for safety related equipment per 1OCFR Part 50, is not currently in effect at the actuators manufacturer's facility.

Further review of the damper assembly documentation revealed that the

seismic analysis performed on the damper assemblies did not seismically analyze the actuators themselves, but only considered their weight as it seismically affected the damper frame. This information prompted Iowa Electric to audit the damper manufacturer and check for documentation that pertained to the

seismic qualifications of the isolation damper actuators. Results from the audit of the damper manufacturer revealed that the actuators were never purchased by the damper manufacturer as seismically qualified components nor did the damper manufacturer administer a Quality Assurance program concerning the purchase of the actuators.

Since no traceability or Certificate of Conformance was available for the

seismic qualifications of the actuators, a seismic analysis was performed on the critical components of the actuators in order to seismically qualify the damper actuators for use in the Duane Arnold Energy Center. This seismic analysis followed the guidelines set forth in the original purchase specification for the isolation dampers (ref. Bechtel 7884-M-100). By seismically qualifying the isolation damper actuators, Iowa Electric will be able to buy Quality Level I actuators in accordance with Revision 1, Chapter 4 of the Quality Assurance Manual under Standard Industrial Quality Items 4.7.3.

Solution

A seismic analysis was performed on five models of the Rockwell HillsMcCanna Ramcon Pneumatic Actuator product line that are installed as isolation damper actuators at the Duane Arnold Energy Center. These five models include the following:

* R-260 FS * R-450 FS * R-960 FS e R-2000 FS 7 r

6 * R-4200 FS

The seismic analysis on the actuators followed .the general project seismic requirements for frequency-not-determined class 1 equipment in the reactor building and in the control building (ref. Bechtel 7884-M-100, Technical Specifications for Isolation Dampers for the Duane Arnold Energy Center Unit 1, Revision 0, 12-28-70).

A.visual inspection of all isolation damper actuators at the Duane Arnold Energy Center was made in order to verify model number, serial number and elevation location in the plant. After verifying the elevation location in the plant, static coefficients (g units) were determined for the highest installed actuator for each of the five actuator models. The horizontal static coefficient was then appiied to all three of the orientation axis which eliminated many repetitious calculations and the need for detailed actuator orientation information. Applying the horizontal static coefficient to each axis provided conservative results since the horizontal coefficient is always greater than one plus the vertical coefficient (Fvertical = (Weight) (1 + gV), Fhorizontal = (Weight) (gh), gh > 1 + gv).

The seismic analysis concentrated on the critical areas of the damper actuator where the seismically induced loads could possibly make the actuator. fail, malfunction, or prevent operation. Five areas on each actuator model were identified as critical areas requiring a seismic analysis of the various components interfacing with that critical area. These five critical areas are identified as the following:

o Retaining key which holds the spring cylinder assembly to the main body cylinder

o Main body cylinder o Press fit between main body cylinder and the mounting yoke o Mounting hardware o Mounting yoke

Dimensions and material specifications for the seismic analysis were obtained through the use of proprietary component drawings that were on loan to Iowa Electric from Rockwell Hills-McCanna of Carpentersville, Illinois. All prints applicable to this seismic analysis are listed in the reference section of the referenced calculations.

Four basic assumptions are applied throughout the entire seismic analysis of the damper actuators. These assumptions allow Iowa Electric to use the floor response spectra as the design/qualification spectra for the seismic analysis. The four basic assumptions are as follows:

o The mounting of the damper is a rigid structure (f > 33 cps) o The damper itself is a rigid structure (f > 33 cps) o The support bracket for the actuator is a rigid structure (f > 33 cps) o The seismic requirements for evaluatinq the actuators are .the same as

those for the isolation dampers.

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A ~ .0'. -, . -~ ~ -

The maximum seismic stresses were calcu ated by using the square root sum of the squares method for combining the three earthquake direction stresses as recommended in the UFSAR for seismic analysis at the Duane Arnold Energy Center. A second method, the distortion energy method was used for combining stresses at the press fit between the main body cylinder and the mounting yoke. The distortion-energy method was used in place of the square:root sum of the . squares method because the stresses due to the press-fit condition exceeded and dominated those caused by the seismic event. All maximum stresses were then compared to some fraction of the yield strength depending on the material type and stress type. Operability after a DBE event was ensured by requiring that the iaximum stress from comined seismic and normal loads should not exceed 90% of the yield.stress of the material.

Conclusion

After completing the above described seismic analysis on the five models of Hills-McCanna. actuators installed on the isolation dampers at the Duane Arnold Energy Center, it was found that the maximum stresses from the combined seismic and normal loads do not exceed the material yield requirements defined in the isolation damper purchase specification. The results of this seismic analysis reveal that the five models.of Hills-McCanna actuators are seismically qualified for use at the Duane Arnold Energy Center.

References

- Bechtel Purchase Specification 7884-M-100

Formulas for Stress and Strain; Raymond J. Roark, Warren C. Young, Fifth Edition, McGraw-Hill Book Co. 1975

Hills-McCanna Information Bulletins; R-1090, R-1090A, R110C, R1100A, R111C, R-1110A, R-112D, R-1120A, R-113D, R-1130A

Marks' Standard Handbook for Mechanical Engineers' Baumeister Eighth Edition, McGraw-Hill Book Company 1973

Materials Selector 75; Reinhold Publishing Co. Mid September 1974, Vol. 80, No. 4, Brown Printing Co.

Mechanical Engineering Design; Joseph E. Shigley, Third Edition, McGrawHill Book Co. 1977

Mechanics of Materials; Higdon, Ohlsen, Stiles, Weese, Riley Third. Edition, John Wiley and Sons 1978

r ,,

- -. - .~'a-

Ro~ckwell Hills-McCanna; Proprietary Drawings

DATA: Information contained on drawings is proprietary and confidential and is not to te given or loaned to others. Drawings are to be returned to Rockwell upon completion of their intended use in making the seismic analysis., R260 R450-R960 R2000-R4200 430-1004 r50-7511

- 430-7510 .430-7511 420-2003 430-3005 430-4101 430-4102 430-2101

-430-2904 430-2502430-2501 .430-3321 430-3322 430-3325 430-3201

.430-3202 430-8203

450-1005 450-7512 4L50-3005 450-3007 450-4101 450-4102 450-2101 450-2906 450-2507 450-2501 450-3201 450-3202 450-3203 40-3326 450-3325 450-3321 450-3320

460-7511460-1001 460-7509 460-3001 460-3003 460-4101 460-4102 460-2101 460-2904. 460-2503 460-2502 460-3208 460-3209

. .,. 460-3210

... 460-3317 460-3316 460-3320 460-3321 460-3314 460-3315

U.S.S. Steel Desian Manual; R.L. Brockenbrough and B.G. Johnson, Jan. 1981

7 ~ ~"A.

MARTIN REIFSCHNEIDER Reviewer for Calculations M84-11,12,13,14,15

POSITION

EDUCATION

PROFESSIONA DATA

SUMMARY

EXPERIENCE

Senior Civil/Structural Engineer

BS, Civil Engineering, University of Michigan

MS, Civil/Structural Engineering, University of Michigan

Registered Professional Engineer in Michigan

1 year: Senior Engineer; Civil/ Strxctural Staff

4 years: Senior Engineer; Midland, Palisades, and Big Rock Point Nuclear Power Plants

1 year: Resident Engineer, Midland Nuclear Power Plant

Mr. Reifschneider is currently assigned as a civil/structural engineer on the civil/ structural staff. His duties include; preparation of design standards; review of project calculations, drawings, specifications and -seismic qualification of equipment; providing consultation to civil/structural engineers engaged in the design of nuclear and fossil power plants; solving special static and dynamic structural problems.

Prior to joining the civil/structural staff, Mr. Reifschneider was a civil/ structural engineer on Consumers Power Company's Palisades project. His duties included finite element analysis of the biological shield wall, seismic analysis and design of blockwall supports, and seismic analysis and design of the auxiliary building addition including the review of seismic equipment qualifications.

Prior to joining the Palisades project, Mr..Reifschneider was a civil/structural resident engineer at the jobsite of Consumers Power company's Midland nuclear plant project. His duties included interfacing with construction personnel on the design, erection, and construction of seismic instrument and equipment supports.

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Prior to his jobsite assignment, Mr. Reifachneider conducted research on the inelastic design and behavior of braced structural steel systems, moment.frame structural steel system, and reinforced concrete shear wall systems. -He co-authored three Bechtel reports on the findings of this research.

Prior to his research assignment, Mr. Reifschneider was a civil/structural engineer on the Midland nuclear plant project. His duties included designing seismic supports for HVAC ducts and electrical cabletrays.

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ANALYSIS/CALCULATION NO: - Z


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REFERENCE DOCUMENTS

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Background

The purpose for compiling calculations M84-11, 12, 13, 14, 15 was to perform a sei.smic analysis on the critical components of the Hills-McCanna Pneumatic Damper Actuators. These actuators are part of the secondary containment isolation system at the Duane Arnold Energy Center'

On January 26, 1984, Iowa Electric notified the NRC by telephone that the above mentioned actuators were potentially deficient in meeting their purchase specification. A review of the documents relatinq to this discrepancy revealed that the isolation damper assemblies were purchased originally as complete assemblies which included the damper actuators. Subsequent orders for "likefor-like" replacement actuators were placed directly with the actuator manufacturer who was a subvendor to the damper manufacturer. This most recent purchase order for actuators revealed that a quality assurance program, as required for safety related equipment per 10CFR Part 50, is not currently in effect at.the actuators manufacturer's facility.

Further review of the damper assembly documentation revealed that the seismic analysis performed on the damper assemblies did not seismically analyze the actuators themselves, but only considered their weight as it seismically affected the damper frame. This information prompted Iowa Electric to audit the damper manufacturer and check for documentation that pertained to the seismic qualifications of the isolation damper actuators. Results from the audit of the damper manufacturer revealed that the actuators were never purchased by-the damper manufacturer as seismically qualified components nor did the damper manufacturer administer a Quality Assurance program concerning the purchase of the actuators.

Since no traceability or Certificate of Conformance was available for the seismic qualifications of the actuators, a seismic analysis was performed on the critical components of the actuators in order to seismically qualify the damper actuators for use in the Duane Arnold Energy Center. This seismic analysis followed the guidelines set forth in the original purchase specification for the isolation dampers (ref. Bechtel 7884-M-100). By seismically qualifying the isolation damper actuators, Iowa Electric will be able to buy Quality Level I actuators in accordance with Revision 1, Chapter 4 of the Quality Assurance Manual under Standard Industrial Quality Items 4.7.3.

Solution


* R-260 FS e R-450 FS * R-960 FS * R-2000 FS a R-4200 FS

_UU3, - *.4.

The seismic analysis on the actuators followed the general project seismic requirements for frequency-not-determined class 1 equipment in the reactor building and in the control building (ref. Bechtel 7884-M-100, Technical Specifications for Isolation Dampers for the Duane Arnold Energy Center Unit 1, Revision 0, 12-28-70).

A visual inspection of all isolation damper actuators at the Duane Arnold Energy Center' was made in order to verify model number, seria-1 number and elevation location in the plant. After verifying the elevation location in the plant, static coefficients (g units) were determined for the highest installed actuator for each of the five actuator models. The horizontal static co*ifficient was then applied to all three of the orientation axis which eliminated many repetitious calculations and the need for detailed actuator orientation information. Applying the horizontal static coefficient to each axis provided conservative results since the horizontal coefficient is always greater than one plus the vertical coefficient (Fvertical = (Weight) (1 + gv),Fhorizontal = (Weight) (gh)0 gh > 1 + gv).

The seismic analysis concentrated on the critical areas of the damper actuator where the seismically induced loads could possibly make the actuator. fail, malfunction, or prevent operation. Five areas on each actuator model were Identified as critical areas requiring a seismic analysis of the various components interfacing with that critical area. These five critical areas are identified as the following:


o Main body cylinder o Press fit between main body cylinder and the mou-nting yoke o Mounting hardware o Mounting yoke

Dimensions and material specifications for the seismic analysis were obtained through the use of proprietary component drawings that were on loan to Iowa Electric from Rockwell Hills-,McCanna of Carpentersville, Illinois. All prints applicable to this seismic analysis are listed in the reference section of the referenced calculations.

Four basic assumptions are applied throughout the entire seismic analysis of the damper actuators. These assumptions allow Iowa Electric to use the floor response spectra as the design/qualification spectra for the seismic analysis. The four basic assumptions are as follows:

o0

o0

o o0

The mounting of the damper is a rigid structure (f >. 33 cps) The damper itself is a rigid structure (f > 33 cps) The support bracket for the actuator is a rigid structure (f > 33 cps) The seismic requirements for evaluatinq the actuators are the same as those for the isolation dampers.

.~A. .. t.'.4-

The -maximum seismic stresses were calculated by using the square root sum of the squares method for combining the three earthquake direction stresses as recommended in the UFSAR for seismic analysis at the Duane Arnold Energy Center. A second method,the distortion energy method was used for combining stresses at the press fit between the main body cylinder and the mounting yoke. The distortion energy method was used in place of the squareproot sum of the squares method because the stresses due to the press-fit condition exceeded and dominated those caused by the seismic event. All maximum stresses were then compared to some fraction of the yield strength depending on the material type and stress type. Operability after a DBE event was ensured by requiring that ne maximum stress from combined seismic and normal loads should not exceed 90%

of the yield stress of the material.

Conclusion

After completing the above described seismic analysis on the five models of Hills-McCanna actuators installed on the-isolation dampers at the Duane Arnold Energy Center, it was found that the maximum stresses from the combined seismic and normal loads do not exceed the material yield requirements defined in the isolation damper purchase specification. The results of this seismic analysis reveal that the .five models of Hills-McCanna.actuators are seismically qualified for use at the Duane Arnold Energy Center.

References

-Bechtel Purchase Specification 7884-M-100


Hills-McCanna Information Bulletins; R-1090, R-1090A, R110C, R1100A, R111C, R-1110A, R-1120, R-1120A, R-113D, R-1130A




Mechanics of Materials; Higdon, Ohlsen, Stiles, Weese, Riley Third Edition, John Wiley and Sons 1978

77, 17, F" _ r". n 7 .9, A

Rcckwell Hills'-McCanna; Proprietary Drawings L i

DATA: Information contained on drawings is proprietary and confidential and is not to be given or loaned to others. Drawings are to be returned to Rockwell upon completion of their intended use in making the seismic analysis.. R260 R450-R960 R2000-R4200

43U-1UU4 430-7510 .430-7511 43j-2003 430-3005 430-4101 430-4102 .430-2101 430-2904 430-2502430-2501 430-3321 430-3322 430-3325 430-3201 .430-3202 430-8203

450-7511 450-1005 450-7512 450-3005450-3007 450-4101 450-4102 450-2101 450-2906 450-2507 450-2501 450-.3201 450-3202 450-3203. 450-3326 450-3325 450-3321 450-3320

460-7511 460-1001 460-7509 460-3001 460-3003 460-4101 460-4102 460-2101 460-2904. 460-2503 460-2502 460-3208 460-3209 460-3210 460-3317 460-3316 460-3320 460-3321 460-3314 460-3315

U.S.S. Steel Design Manual; R.L. Brockenbrough and -B.G. 1981

Johnson, Jan.


POSITION

EDUCATION

PROFESSIONAL DATA

SUMMARY

EXPERI ENCE



MS, Civil/Structural Engineering, University of Michigan


1 year: Senior Engineer; Civil/ trucural Staff



Mr. Reifschneider is currently assigned as a civil/structural engineer on the civil/ structural staff. His duties include; preparation of design standards; review of project calculations, drawings, specifications and .seismic qualification of equipment; providing consultation to civil/structural engineers engaged in the design of nuclear and fossil power plants; solving special static and dynamic structural problems.


Prior to joining the Palisades project, Mr..Reifschneider was a civil/structural resident engineer at the jobsite of Consumers Power company's Midland nuclear plant project. His duties included interfacing with construction personnel on the design, erection, and construction of seismic instrument and equipment supports.

~,

.-..

F- C- 7

Reviewer for Calculations M84-11,12,13,14,15

Prior to his jobsite assignment, Mr. Reifschneider conducted research on the inelastic design and behavior of braced structural steel systems, moment frame structural steel system, and reinforced concrete shear wall systems. He co-authored three Bechtel reports on the findings of this research.


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ANALYSIS/CALCULATION NO:jA p 4--

ANALYSIS/CALCULATION TITLE: <>Z7 .k- N\ \ .

IA % k- - - \t-CO , v P Om\ (

REFERENCE DOCUMENTS

MAR NO:

DCR NO:

OTHERS: v76s

PREPARED BY:Xbl V~~ (

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FINAL APPROVAL BY:

DATE:

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FORM NG-007Z REV. 0

N- rup olp', -%c.

I

Background

The purpose for compiling calculations M84-11, 12, 13, 14, 15 was to perform a seismic analysis on the critical components of the Hills-McCanna Pneumatic Damper Actuators. These actuators are part of the secondary containment isolation system at the Duane Arnold Energy Center

On January 26, 1984, Iowa Electric notified the NRC by telephone that the above mentioned actuators were potentially deficient in meeting their purchase specification. A review of the documents relating to this discrepancy revealed that the isolation damper assemblies were purchased originally as complete assemblies which included the damper actuators. Subsequent orders for "likefor-like" replacement actuators were placed directly with the actuator manufacturer who was a subvendor to the damper manufacturer. This most recent purchase order for actuators revealed that a quality assurance program, as required for safety related equipment per 10CFR Part 50, is not currently in effect at the actuators manufacturer's facility.

Further review of the damper assembly documentation revealed that the seismic analysis performed on the damper assemblies did not seismically analyze the actuators themselves, but only considered their weight as it seismically affected the damper frame. This information prompted Iowa Electric to audit the damper manufacturer and check for documentation that pertained to the seismic qualifications of the isolation damper actuators. Results from the audit of the damper manufacturer revealed that the actuators were never purchased by.the damper manufacturer as seismically qualified components nor did the damper manufacturer administer a Quality Assurance program concerning the purchase of the actuators.

Since no traceability or Certificate of Conformance was available for the seismic qualifications of the actuators, a seismic analysis was performed on the critical components of the actuators in order to seismically qualify the damper actuators for use in the Duane Arnold Energy Center. This seismic analysis followed the guidelines set forth in-the original purchase specification for the isolation dampers (ref. Bechtel 7884-M-100). By seismically qualifying the isolation damper actuators, Iowa Electric will be able to buy Quality Level I actuators in accordance with Revision 1, Chapter 4 of the Quality Assurance Manual under Standard Industrial Quality Items 4.7.3.

Solution

A seismic analysis was performed on five models of the Rockwell HillsMcCanna Ramcon Pneumatic Actuator product line that are installed as .isolation damper actuators at the Duane Arnold Energy Center. These five models include the following:

* R-260 FS * R-450 FS * R-960 FS a R-2000 FS * R-4200 FS

The seismic analysis on the actuators followed the general project seismic requirements for frequency-not-determined class 1.equipment in the reactor building and in the control building (ref. Bechtel 7884-M-100, Technical Specifications for Isolation Dampers for the Duane Arnold Energy Center Unit 1, Revision 0, 12-28-70).

A.visual inspection of all isolation damper actuators at the Duane Arnold Energy Center was made in order to verify model number, serial number and elevation location in the plant. After verifying the elevation location in .the plant, static coefficients (g units) were determined for the highest installed actuator for each of the five actuator models. The horizontal static coefficient was then applied to all three of the orientation axis which eliminated many repetitious calculations and the need for detailed actuator orientation information. Applying the horizontal static coefficient to each axis provided conservative results since the horizontal coefficient is always greater than one plus the vertical coefficient (Fvertical = (Weight) (1 + gv)l, Fhorizontal = (Weight) (gh), gh > 1 + gv).

The seismic analysis concentrated on the critical areas of the damper actuator where the seismically induced loads could possibly make the actuator. fail, malfunction, or prevent operation. Five areas on-each actuator model were identified as critical areas requiring a seismic analysis of the various components interfacing with that critical area. These five critical areas .are identified as the following:

- o Retaining key which holds the spring cylinder assembly to the main body cylinder


Dimensions and material specifications for the seismic analysis were obtained through the use of proprietary component drawings that were on loan to Iowa Electric from Rockwell Hills-McCanna of Carpentersville, Illinois. All prints applicable to-this seismic analysis are listed in the reference section of the referenced calculations.

Four basic assumptions are applied throughout the entire seismic analysis of the damper actuators. These assumptions allow Iowa Electric to use the floor response spectra as the design/qualification spectra for .the seismic analysis. The four basic assumptions are as follows:

o The mounting of the damper is a rigid structure (f > 33 cps) o The damper itself is a rigid structure (f > 33 cps) o The support bracket for the actuator is a rigid structure (f > 33 cps) o The seismic requirements for evaluating the actuators are the same as


The maximum seismic stresses were calcu!ated by using the square root sum of the squares method for combining the three earthquake direction stresses as recommended in the UFSAR for seismic analysis at the Duane Arnold Energy Center. A second method, the distortion energy method was used for combining stresses at the press fit between the main body cylinder and the mounting yoke. The distortion energy method was used in place of the square root sum of the squares method because the .stresses due to the press-fit condition exceeded and dominated those caused by the seismic event. All maximum stresses were then compared to some fraction of.the yield strength depending on the material type and stress type. Operability after a DBE event was ensured by requiring that the maximum stress from combined seismic and normal loads should not exceed 90% of the yield.stress of the material.

Conclusion

After completing the above described seismic analysis on the five models of Hills-McCanna. actuators installed on the isolation dampers at the Duane Arnold Energy Center, it was found that the maximum stresses from the combined seismic and normalloads do not exceed the material yield requirements defined in the isolation damper purchase specification. The results of this seismic analysis reveal that the five models of Hills-McCanna actuators .are seismically qualified for use at.the Duane Arnold .Energy..Center.

References

Bechtel Purchase Specification 7884-M-100






Mechanics of Materials; Higdon, Ohlsen, Stiles, Weese, Riley Thir.d Edition, John Wiley and Sons 1978

Rockwell Hills-McCanna; Proprietary Drawings

DATA: Information contained on drawings is proprietary and confidential and is not to be given or loaned to others. Drawings are to be returned to Rockwell upon completion of their intended use in making the seismic analysis..R450-R960

450-7511450-1005 450-7512 450-3005 450-3007 450-4101 450-4102 450-2101 450-2906 450-2507 450-2501 450-3201 450-3202 450-3203 450-3326

.450-3325

.450-3321 450-3320

R2000-R4200

460-7511460-1001 460-7509 460-3001 460-3003 460-4101 460-4102 460-2101 460-2904. 460-2503 460-2502 460-3203 460-3209 460-3210 ..460-3317 460-3316 460-3320 460-3321 460-3314 460-3315 -

U.S.S. Steel Desion Manual; 1981

- . Stt.tTh

R.L. Brockenbrough and B.G. Johnson, Jan.

-. - ~

R260 .

430-1004 430-7510 .430-7511 430-3003 430-3005 430-4101 430-4102 .430-2101 430-2904 430-2502430-2501 .430-3321 430-3322 430-3325 430-3201 .430-3202 430-8203

C.; IRi, -jrj rl--;


POSITION

EDUCATION

PROFESSIONAL. DATA

SUMMARY

EXPERIENCE



MS, Civil/Structural Engineering, University of Michigan ..


1 year: Senior Engineer; Civil/ Structural Staff



Mr. Reifschneider is currently assigned as a civil/structural engineer on the civil/ structural staff. His duties include; preparation of design standards; review of project calculations, drawings, specifications and.seismic qualification of equipment; providing consultation to civil/structural engineers engaged in the design of nuclear and fossil power plants; solving special static and dynamic structural problems.


Prior to joining the Palisades project, Mr. Reifschneider was a civil/structural resident engineer at the jobsite of Consumers Power company's Midland nuclear plant project. His duties included interfacing with construction personnel on the design, erection, and construction of seismic instrument and equipment.supports.


Prior to his jobsite assignment, Mr. Reifschneider conducted research on the inelastic design and behavior of braced structural steel systems,.moment frame structural steel system, and reinforced concrete shear wall systems. He W co-authored three Bechtel reports on the findings of this research.


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ANALYSIS/CALCULATION NO: cA 4 -


REFERENCE DOCUMENTS

MAR NO:

DCR NO:

OTHERS: o qqg

C-lNC AAB8I-1a

PREPARED

REVIEWED

APPROVED.

DATE:

DATE: 4-___

DATE: 4L '

D ATE: 6w 7'FINAL APPROVAL B

FORM NG-007Z REV. 0

BY:

qAi= %-- n % (

In

Background

The purpose for compiling calculations M84-11, 12, 13, 14, 15 was to perform a seismic analysis on the critical components of the Hills-McCanna Pneumatic Damper Actuators. These actuators are part of the secondary containment.iso.lat-ion system at the Duane Arnold Energy Center

On January 26, 1984, Iowa Electric notified the NRC by telephone that the above mentioned actuators were potentially deficient in meeting their purchase specification. A review of the documents relating to this discrepancy revealed that the isolation damper assemblies were purchased originally as complete assemblies which included the damper actuators. Subsequent orders for "likefor-like" replacement actuators were placed directly with the actuator manufacturer who was a subvendor to the damper manufacturer. This most recent purchase order for actuators revealed that a quality assurance program, as required for safety related equipment per 1OCFR Part 50, is not currently in effect at the actuators manufacturer's facility.

Further review of the damper assembly documentation revealed that the seismic analysis performed on the damper assemblies did not seismically analyze. the actuators themselves, but only considered their weight as it seismically affected the damper frame. This information prompted Iowa Electric to audit the damper manufacturer and check for documentation that pertained to the seismic qualifications of the isolation damper actuators. Results from the audit of the damper manufacturer revealed that the actuators were never/ purchased by the damper manufacturer as seismically qualified components nor did the damper manufacturer administer a Quality Assurance program concerning the purchase of the actuators.

Since no traceability or Certificate of Conformance was available for the seismic qualifications of the actuators, a seismic analysis was performed on the critical components of the actuators in order to seismically qualify the damper actuators for use in the Duane Arnold Energy Center. This seismic analysis followed the guidelines set forth in the original purchase specification for the isolation dampers (ref. Bechtel 7884-M-100). By seismically qualifying the isolation damper actuators, Iowa Electric will be able to buy Quality Level I actuators in accordance with Revision 1, Chapter 4 of the Quality Assurance Manual under Standard Industrial Quality Items 4.7.3.

Solution


o R-260 FS e R-450 FS * R-960 FS * R-2000 FS * R-4200 FS

The seismic analysis on the actuators followed the general project seisic"d ' requirements for frequency-not-determined class 1 equipment in the reactor building and in the control building (ref. Bechtel 7884-M-100, Technical Specifications for Isolation Dampers for the Duane Arnold Energy Center Unit 1, Revision 0, 12-28-70).

A visual-inspection of all isolation damper actuators at the Duane Arnold Energy Center was made in order to verify model number, serial number and elevation location in the plant. After verifying the elevation location in the plant, static coefficients,(g units) were determined for the highest installed actuator for each of the five actuator models. The horizontal static coefficient was then applied to all three of the orientation axis which eliminated many repetitious calculations and the need for detailed actuator orientation information. Applying the horizontal static coefficient to each axis provided conservative results since the horizontal coefficient is always greater than one plus the vertical coefficient (Fvertical = (Weight) (1 + gv), Fhorizontal = (Weight) (gh), gh > 1 + gv)*

The seismic analysis concentrated on the critical areas of the damper actuator where the seismically induced loads could possibly make the actuator fail, malfunction, or prevent operation. Five areas on each actuator model were identified as critical areas requirinq a seismic analysis of the various components interfacing with that critical area. These five critical areas are identified as the following:


o Main body cylinder o Press fit between main body cylinder and the mounting yoke o Mounting hardware* o Mounting yoke

Dimensions and material specifications for the seismic analysis were obtained through the use of proprietary component drawings that were on loan to Iowa.Electric from Rockwell Hills-McCanna of Carpentersville, Illinois. All prints applicable to this seismic analysis are listed in the reference section of the referenced calculations.

Four basic assumptions are applied throuqhout the entire seismic analysis of the damper actuators. These assumptions allow Iowa Electric to use the floor response spectra as the desiqn/qualification spectra for the seismic analysis. The four basic assumptions are as follows:

o The mounting of the damper is a riqid structure (f > 33 cps) o The damper itself is a rigid structure (f> 33 cps) o The support bracket for the actuator is a rigid structure (f > 33 cps) o The seismic requirements for evaluatinq the actuators are the same as


-0jjjMj1jdb;Cjj bla" -jimpt

The maximum seismic stresses were calculated by using the square root sum of the. squares method for combining the three earthquake direction stresses as recommended in the UFSAR for seismic analysis at the Duane Arnold Energy Center. A second method, the distortion energy method was used for combining stresses at the press.fit between the main body cylinder and the mounting yoke. The distortion energy method was used in place of the square root sum of the squafes method .because the stresses due to the press-fit condition exceeded and dominated those caused by the seismic event. All maximum stresses were then compared to some fraction of the yield strength depending on the material type and stress type. Operability after a DBE event was ensured by requiring that the maximum stress from combined-seismic and normal loads should not exceed 90% of the yield stress of the material.

Conclusion

After completing the above described seismic analysis on the five models of Hills-McCanna actuators installed on the isolation dampers at the Duane Arnold Energy Center, it was found that the maximum stresses from the combined seismic and normal loads do not exceed the material yield requirements defined in the isolation damper purchase specification. The results of this seismic analysis.reveal that.t.he.five models of Hills-McCanna actuators are seismically qualified for.,use at the Duane Arnold Energy Center.

References

B8echtel Purchase Specification 7884-M-100,




Materials Selector 75; Reinhold Publishinq Co. Mid September 1974, Vol. 80, No. 4, Brown Printing Co.

Mechanical EngineerinqDesion; Joseph E. Shigley, Third Edition, McGrawHill Book Co. 1977


Rockwell Hills-McCanna; Proprietary Drawings e

DATA:-Information contained on drawings is proprietary and confidential and is not to be given or loaned to others. Drawings are to be returned to Rockwell upon completion of their intended use inzmaking the seismic analysis. . R260 R450-R960 R2000-R4200 ' 430-1004 450-7511 460-7511 430-7510 450-1005 460-1001 .430-7511 450-7512 460-7509 430-3003 450-3005 460-3001 430-3005 450-3007 460-3003 430-4101 450-4101 460-4101 430-4102 450-4102 460-4102 430-2101 450-2101 460-2101 430-2904 450-2906 460-2904. 430-2502 450-2507 460-2503 430-2501 450-2501 460-2502 .430-3321 450-3201 460-3208 430-3322 450-3202 460-3209 430-3325 450-3203 460-3210 430-3201 450-3326 .460-3317 .430-3202 450-3325 460-3316 430-8203 450-3321 460-3320

450-3320 460-3321 460-3314 460-3315

U.S.S. Steel Desiqn Manual; R.L. Brockenbrough and B.G. Johnson, Jan. 1981


POSITION

EDUCATION

PROFESSIONAL bATA

SUMMARY

EXPERIENCE

Senior Civil/Structural Engineer 4


MS, Civil/Structural Engineering, .University of Michigan





Mr. Reifschneider is currently assigned as a civil/structural engineer on the civil/ structural staff. His duties include; preparation of design standards; review of project calculations, drawings, specifications and seismic qualification of equipment; providing consultation to civil/structural engineers engaged in the design of nuclear and fossil power Plants; solving special static and dynamic structural problems.


Prior to joining the Palisades project, Mr. Reifschneider was a civil/structural resident engineer at the jobsite of Consumers Power company's Midland nuclear plant project. His duties included interfacing with construction personnel on the design, erection, and construction of seismic instrument and equipment supports.

Reviewer for Calculations M84-11,12,13,14,15

Prior to his jobsite assignmen Mr. Reifschneider conducted research on the inelastic design and behavior of braced structural steel systems, moment frame structural steel system, and reinforcedr concrete shear wall systems. He co-authored three Bechtel reports on the findings of this research.

Prior to his research assignment, Mr. Reifschneider was a civil/structural engineer on the Midland nuclear plant project. His duties included designing seismic supports for HVAC ducts and electrical cabletrays..

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Background

The purpose for compiling calculations.M84-11, 12, 13, 14, 15 was to perform a seismic analysis on the critical components of the Hills-McCanna Pneumatic Damper Actuators. These actuators are part of the secondary containment isolation system at the Duane Arnold Energy Center

On January 26, 1984, Iowa Electric notified the NRC by telephone that.the above mentioned actuators were potentially deficient in meeting their purchase specification. A review of the documents relating to this discrepancy revealed that the isolation damper assemblies were purchased originally as complete assemblies which included the damper actuators. Subsequent orders for "likefor-like" replacement actuators were placed directly with the actuator manufacturer who was a subvendor to the damper manufacturer. This most recent purchase order for actuators revealed that a quality assurance program, as required for safety related equipment per 1OCFR Part 50, is not currently in effect at the actuators manufacturer's facility.

Further review of the damper assembly documentation revealed that the seismic analysis performed on the damper assemblies did not seismically analyze the actuators themselves, but only considered their weight as it seismically affected the damper frame. This information prompted Iowa Electric to audit the damper manufacturer and check for documentation that pertained to the seismic qualifications of the isolation damper actuators. Results from the audit of-the damper manufacturer revealed that the actuators were never purchased by the damper manufacturer as seismically qualified components nor did the damper manufacturer administer a Quality Assurance program concerning the purchase of the actuators.

Since no traceability or Certificate of Conformance was available for the seismic qualifications of the actuators, a seismic analysis was performed on the critical components of the actuators in order to seismically qualify the damper actuators for use in the Duane Arnold Energy Center. This seismic analysis followed the guidelines set forth in-the original purchase specification for the isolation dampers (ref. Bechtel 7884-M-100). By seismically qualifying the isolation damper actuators, Iowa Electric will be able to buy Quality Level I actuators in accordance with Revision 1, Chapter 4 of the Quality Assurance Manual under Standard Industrial Quality Items 4.7.3.

Solution


* R-260 FS * R-450 FS * R-960 FS * R-2000 FS * R-4200 FS

The seismic analysis on the actuators followed the general project seismic requirements for frequency-not-determined class 1 equipment in the reactor building and in the control building (ref. Bechtel 7884-M-100, Technical Specifications for Isolation Dampers for the Duane Arnold Energy Center Unit 1, Revision 0, 12-28-70).

A visual inspection of all isolation damper actuators at;the Duane Arnold Energy Center was .made in order to verify model number, serial number and elevation location in the plant. After verifying the elevation location in the plant, static coefficients (,g units) were determined for the highest installed actuator for each of the five actuator models. The horizontal static coefficient was then applied to all three of the orientation axis which eliminated many repetitious calculations and the need for detailed actuator orientation information. Applying the horizontal static coefficient to each axis provided conservative results since the horizontal coefficient is always greater than one plus the vertical coefficient (Fvertical = (Weight) (1 + gv), Fhorizontal = (Weight) (gh) gh > 1 + gv).

The seismic analysis concentrated on the critical areas of the damper actuator where the seismically induced loads could possibly make the actuator fail,-malfunction, or prevent operation.' Five areas on each actuator model were identified as critical areas requiring a seismic analysis of the various components interfacing with that critical area. These five critical areas are identified as the following:



Dimensions and material specifications for the seismic analysis were obtained through the use of proprietary component drawings that were on loan to Iowa Electric from Rockwell Hills-McCanna of Carpentersville, Illinois. All prints applicable to this seismic analysis are listed in the reference section of the referenced calculations.

Four basic assumptions are applied throughout the entire seismic analysis of the damper actuators. These assumptions allow Iowa Electric to use the floor response-spectra as the design/qualification spectra .for the seismic analysis. The four basic assumptions are as follows:

o The mounting of the damper is a rigid structure (f > 33 cps) o The damper itself is a rigid structure (f > 33 cps) o The support bracket for the actuator is a rigid structure (f > 33 cps) o The seismic requirements for evaluating the actuators are the same as


The maximum seismic stresses were calculated by using the square root sum of the squares method for combining the three earthquake direction stresses as recommended in the UFSAR for seismic analysis at the Duane Arnold Energy Center. A second method, the distortion energy method was used for combining stresses at the press fit between the main body cylinder and the mounting yoke. The distortion energy method was used in place of the square root sum of the squares method because the stresses due to the press-fit condition exceeded and dominated those caused by the seismic event. All maximum stresses were then. compared to some fraction of the yield strength depending on the material type and stress type. Operability after a DBE event was ensured by requiring that the maximum stress from combined seismic and normal loads should not exceed 90% of the yield stress of the material.

Conclusion

After completing the above described seismic analysis on the five models of Hills-McCanna actuators installed on the isolation dampers at the Duane Arnold Energy Center, it was found that the maximum stresses from the combined seismic and normal loads do-not exceed the material yield requirements defined in the isolation damper purchase specification. The results of this seismic analysis reveal that the five models.of Hills-McCanna actuators are seismically qualified for use at the Duane Arnold Energy Center.

References

Bechtel Purchase Specification 7884-M-100


Hills-McCanna Information Bulletins; R-1090, R-1090A, R110C, R1100A, R111C, R-1110A, R-112D, R-1120A, R-113D, R-1130A





Rockwell Hills-McCanna; Proprietary Drawings

DATA:-Information contained on drawings is proprietary and confidential and is not to be given or loaned to others. Drawings are to be returned to Rockwell upon completion of their intended use in making the seismic analysis.

R450-R960

450-7511 450-1005 450-7512 450-3005 450-3007 450-4101 450-4102 450-2101 450-2906 450-2507 450-2501 450-3201 450-3202 450-3203 450-3326 450-3325 450-3321 450-3320

R2000-R4200

460-7511460-1001 .460-7509 460-3001 460-3003 460-4101 460-4102 460-2101 460-2904. 460-2503 460-2502 460-3208 460-3209 460-3210 ,460-3317 460-3316 460-3320 460-3321 460-3314 460-3315 -

U.S.S. Steel Desian Manual; R.L. Brockenbrough and B.G. Johnson, Jan. 1981

R260

430-1004 430-7510

.430-7511 430-3003 .430-3005 430-4101 430-4102 430-2101 430-2904 430-2502430-2501 .430-3321 430-3322430-3325 430-3201 .430-3202' 430-8203

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POSITION

EDUCATION

PROFESSIONAL DATA

SUMMARY

EXPERIENCE



MS, Civil/Structural Engineering, University of Michigan.

Registered Professional Engineer in MiEhigan




Mr. Reifschneider is currently assigned as a civil/structural engineer on the civil/ structural staff. His duties include; preparation of design standards; review of project calculations, drawings, specifications and.seismic qualification of equipment; providing consultation to civil/structural engineers engaged in the design of nuclear and fossil power plants; solving special static and dynamic structural problems.


Prior to joining the Palisades project, Mr. Reifschneider was a civil/structural resident engineer at the jobsite of Consumers Power company's Midland nuclear plant project. His duties included interfacing with construction personnel on the design, erection, and construction of seismic instrument and equipment supports.

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Prior to his jobsite assignment, Mr. Reifachneider conducted research on the inelastic design and behavior of braced structural steel systems, moment frame structural steel system, and reinforced concrete shear wall systems. He co-authored three Bechtel reports on the findings of this research.

Prior to his research assignment Mr. Reifschneider was a civil/structural engineer on the Midland nuclear plant project. His duties included designing seismic supports for HVAC ducts and electrical cabletrays.

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DESIGN VER FICAT ON ALTERNATE CALCULATIONS


Documents

REGULATORY DOCKET FIIE - nrc.gov · greater than one plus the vertical coefficient (Fvertical = (Weight) (1 + gV), Fhorizontal = (Weight) (gh), gh > 1 + gv). The seismic analysis