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AVERAGE DAILY UNIT POWER LEVEL '*

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DOCKET NO. -50-346

Davis-Besse Unit 1.UNIT ,

DATE. June 14, 1988

COMPLETED BY J. Cinriani

TELEPHONE x 4460

MONTH

DAY AVERAGE DAlt.Y POWER LEVE.. DAY AVER AGE DAILY POWER LEVEL(MWe-Net) # MWe-Net )

1 0 17 0

0 02 ;g

0 03 ,9

04 20 0

5 0 21 0

0 06 22

07 23 0

8 0 24 0

9 0 025

010 _ 26 0

li - 0 27 0

12 0 028

013 29 n

14 n 30 0 i

3 O15 0

016

INSTRUCTIONS ;

On this format. fist the average daily unit power leselin MWe Net for each day in the reporting month. Compute tothe nearest whole megawatt.

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OPERATING DATA REPORT

DOCKET NO. 50-346DATE June 14, 1988

COMPLETED BY J. Cipriani

TELEPHONE x4460

OPERATING STATUS

1. Unit Name: Davis-Besse. Unit No. I Notes

2. Reporting Period: May 1988

3. Licensed Thermal Power (MWt): 27729254. Nameplate Rating (Gross MWe):

5. Design Electrical Rating (Net MWe): 906

6. Maximum Dependable Capacity (Gross MWe): 9048607. Maximum Dependable Capacity (Net MWe): ,

8. If Changes Occur in Capacity Ratings (items Number 3 Through 7) Since Last Report, Give Reasons:

9. Power Level To Which Restricted,if Any (Net MWe):10. Reasons For Restrictions,if Any:

This Month Yr. to.Date Cumulative

11. Hours in Reporting Period 744 3.647 86,303

12. Number Of Hours Reactor Was Critical _

0.0 1,661.2 45,142.1

13. Reactor Reserve Shutdown Hours 0.0 0.0 5.050,1

14. Hours Generator On.Line 0.0 1,580 43,381

15. Unit Reserve Shutdown Hours 0.0 0.0 1,732.5

16. Gross Thermal Energy Generated (MWH) 0.0 3,306,442 101.268.641 .

17. Gross Electrica' Energy Generated (MWH) 0.0 1,072,485 33,448.288, _ ,

18. Net Electrical Energy Generated (MWH) 0.0 998,787 31,299,434

19. Unit Service Factor 0.0 43.3 50.320. Unit Availability Factor 0.0 43.3 52.321. Unit Capacity Factor (Using MDC Net) 0.0 31,8 42.2

0.0 30.2 40.022. Unit Capacity Factor (Using DER Net)23. Ur t Forced Outage Rate 0.0 0.0 32.524. Shutdowns Scheduled Over Next 6 Months (Type. Date, and Duration of Each):

Refueling - Started on March 10, 1988 - 26 weeks - Ends on September 12, 1988

25. If Shut Down At End Of Report Period. Estimated Date of Startup: sentember 12. 198826. Units in Test Status (Prior to Commercial Operation): Forecast Achieved

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INITIAL CRITICALITYINITIAL ELECTRICITYCOMMERCIAL OPERATION

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UNIT SHUTDOLINS AND POblER REDUCTIONS g.KET NO. 50-346UNIT NAME Davie-Basee !

DATE June 14_ l988COMPI.ETED BY J. Cipriani -

REPORT MONTH May 198R TELEPHONE (419) 249-5000-

ext. 4460

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ooO#; cg 2*. "L

-E U$~ 3e Licensee "3 C * Cause & Corrective8 *

No. Date N *2 f"^U Action toEvent c

3" j 2m Report f Prevent Recurrence

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i 2 88-3-10 S 744 C 1 N/A N/A N/A The unit outage which began onMarch 10, 1988 was still in progress

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through the end of May, 1988.

See Operational Summary for furtherdetails.

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3i F: Firced Reason: Method: ' Exhibit C - Instructions for Preparation of Data

5: Scheduled A-Equipment Failure (Emplain) 1-Manual Entry Sheets for Licensee Event Report (LER)8-Maintenance or Test 2-Manual Scree File (NUREC-0161)C-Refueling 3-Automatic ScreeD-Regulatory Resttiction 4-Continuation fromE-Operator Training & License Eramination Frevious Month Exhibit I - Same S .rceF-Administrative 5-Load Reduction * Report challenges to Power Operated Relief ValvesC-Operational Error (Emplain) 9-Other (Emplain) (PORVs) and Pressurizer Code Safety Valves (PCSVs)H-Other (Emplain)i

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OPERATIONAL SUMMARY

Hay 1988

The eleventh veek of the scheduled 26 week Refueling Outage has been :completed and remains on schedule. Ducing Hay, the following significant |

outage activities were completed:* Fuel Handling Bridge Modifications and Testing

UT of Upper Core Barrel Bolts l'*

* Reactor Core Offload I" Station Battery Replacement |' Pressurizer Heater Bundle Replacement* Generator Field Installation* Eddy Current Testing of No. 1 Steam Generator

|' Control Room Center Console Installation

A major ef fort is underway to release completed items to the test groupahead of schedule. The test program is expected to be in full sving in Iearly July with the completion of the majority of our extensive controlRoom Hodifications by July 1. The Decay Heat Loop Train 2 Outage

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consisting mainly of extensive check valve modifications, continues on '

schedule and will be completed in early June. I1

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REFUELING INFORMATION Date: May 1988

1. Name of facility: Davis-Besse Unit 1

2. Scheduled date for next refueling outage? Tentative Outage VindovOctober 1989

3. Scheduled date for restart from current refueling: September 1988

4. Vill refueling or resumption of operation thereafter require atechnical specification change or other license amendment? If answeris yes, what in gene al vill these be? If answer is no, has thereload fuel design and core configuration been reviewed by your PlantSafety Review Committee to determine whether any unreviewed safetyquestions are associated with the core reload (Ref. 10 CFR Section50.59)?

Ans: The Reload Report requires standard reload fuel design TechnicalSpecifications changes (2. Safety Limits and Limiting Safety SystemCettings, 3/4.1 Reactivity Control Systems, 3/4.2 Power DistributionLimits and 3/4.4 Reactor Coolant System.)

5. Scheduled date(s) for submitting proposed licensing action andsupporting information: Submitted May 18, 1988

6. Important licensing considerations associated with refueling, e.g.,new or different fuel design or supplier, unreviewed design orperformance analysis methods, significant changes in fuel design, newoperating procedures.

The highly absorbing silver-indium-cadmium axial power shapinga.rods vill be replaced with reduced absorbing inconel rods.

b. The discrete neutron sources vill be removed from the core and notreplaced.

The physics testing has been reduced in scope.c.

7. The number of fuel assemblies (a) in the core and (b) in the spentfuel storage pool, and (c) the new fuel storage areas.

(a) 0 (b) 445 (c) 0

8. The present licensed spent fuel pool storage capacity and the size of anyincrease in licensed storage capacity that has been requested or isplanned, in number of fuel assemblies.

Present: 735 Increased size by: 0 (zero)9. The projected date of the last refueling that can be discharged to the

spent fuel pool assuming the present licensed capacity.

Date: 1995 - assuming ability to unload the entire core into the spentfuel pool is maintained

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R)LEDO

EDISONEDISON PLAZA300 MADISON AVENUETOLEDO. OHIO 43652-0001

June 14, 1988KB88-00231

Docket No. 50-346License No. NPF-3

Document Control DeskU. S. Nuclear Regulatory CommissionWashington, D. C. 20555

Gentlemen:

Monthly Operating Report, May 1988Davis-Besse Nuclear Power Station Unit 1

Enclosed are ten copies of the Monthly Operating Report for Davis-Besse NuclearPower Station Unit 1 for the month of May 1988.

If you have any questions, please contact Bilal Sarsour at (419) 249-5000,extension 7384.

Very truly yours,

df& , , 69

Louis F. StorzPlant ManagerDavis-Besse Nuclear Power Station

BMS/JEC/plg

Enclosures

cc: Mr. A. Bert DavisRegional Administrator, Region III

Mr. Paul ByronNRC Resident Inspector

Mr. A. V. DeAgazioNRC Project Manager

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