NRC FQBM 1S5(2 76)

U.S. NUCLEAR REGULATORY Co'SSION

NRC DISTRIBUTION FOR PART 50 DOCI<ET MATERIAL FILE NUMBER

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TO: Mr, B,C, Rusche FROM: Indiana & Mich Power Co „

New York, N.Y, 10004J Tillinghast

OATE OF DOCUMENT

3-16-77OATE RECEIVED

3 21-779fLETTER

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oEscRIPTIQN Ltr notarized 3-17-77 request for atemporary change to tech specs to allow a onetime chemical cleaning operati.on of the unit2 condensate & feedwater systems & trans thefollowing: 5P

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ENGLosURE Attachment A is a reuised pages'2.2-4dealing with tech spec .shag!m change..'XPvtransttachment', C '& D. ~ .,4P.

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Donald C. Cook Nuclear PlantDocket Nos. 50-315 and 50-316DPR No. 58 and CPPR No. 61

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Mr. Benard C. Rusche, DirectorOffice of Nuclear Reactor RegulationU.S. Nuclear Regulatory CommissionWashington, D.C. 20555

Dear Mr. Rusche:

This letter is a request for a temporary changeto Environmental Technical Specification 2.2.3.2 to allow aone-time chemical cleaning operation of the Unit No. 2Condensate and Feedwater Systems as described hereafter.Attachment. A is a revised page 2.2-4 to indicate the changewe propose.

As part of the startup operations for Unit No. 2

of the Donald C. Cook Nuclear Plant, it, willbe necessaryto perform a hot detergent cleaning of the Unit No. 2Condensate and Feedwater systems. The cleaning operationis a one-time preoperational hot mater flush with a mildalkaline solution to remove small amounts of materials leftin the piping internals during construction and is expectedto take place during the second quarter of 1977. A similaroperation was performed on Unit No. 1, from July 16 through20, 1973, prior to its startup.

The specific objectives of the preoperationalcleaning are:

1. .To loosen and remove debris not removed byprior water flushing.

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2. To remove from the system piping internals anycoatings or preservatives applied prior to orduring constr'ctiOn..

3. To formaa protective oxide coating on the carbonsteel portions of the system prior to initialstartup.

The "cleaning" willbe done by circulatingapproximately 300,000 gallons of a 180 — 1904F. solutionof tri- anddi-s'odium phosphate throughout the system forapproximately 12-24 hours and then flushing to the on-siteabsorption field with approximately 600,000 gallons of cleanwater.

The composition of the cleaning solution willbeas follows:

a ~

b.

3,500 ppm Tri-sodium phosphate (Na3PO4) .

1,500 ppm Di-sodium phosphate (Na2HPO4).

c ~ 300 ppm Surfactant (mixture of nonionic andanionic surfactants — Dow Industrial Serviceproprietary chemical No. FO-57.)

d. 200 ppm Anti-foaming Agent (silicone base anti-foamemulsion — Dow Industrial Service priprietary chemicalNo. MO-45) .

The cleaning solution and rinse waters willbedrained from the Condensate and Feedwater Systems to the turbineroom sump and pumped to the on-site absorption field.

Section 2.2.3.2 of the Donald C. Cook Nuclearplant Environmental Technical Specifications places thefollowing limitations on the conduct of the cleaning operation:

"Chemicals used in the plant shall be dilutedand. neutralized as required to give a pH in therange of 5.5 to 9 prior to discharge to the onsiteabsorption field."

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2. "No oil or petroleum products shall be dischargedto the lake or onsite absoxption field."

3. "On those occasions when spent chemical cleaningsolutions are to be discharged to the absorptionfield, samples of the sump waste water shall becollected and analyzed for all chemical species(including heavy metals and hydrocarbons) thatpotentially could xesult from the cleaning operation."

We request that we be temporarily allowed to exceedthese limitations for the following reasons:

Although the cleaning solution willbe alkaline(expected pH of about 11.5) the large volumes ofrinse water and lower pH water already in theabsorption field is expected to xeduce the pH ofthe mixture to less than 9.0 at the time of dischargeinto the ground. Thus, we believe it would be unwiseto add approximately 10,000 pounds of neutralizingchemicals —sulfuric or hydrochloric acid —to reduce'the pH of the cleaning mixture to 9.0 prior topumpout at the turbine room sump as this wouldunnecessarily incxease the overall amounts of,chemicals discharged to the environs without acorresponding benefit thereto.

2.

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The cleaning solution will remove any coatings oxpreservatives on the internals of the system pipingand/or heat transfex surfaces. This is required inpreparing the secondary cycle for initial operation.We expect that any hydrocarbons removed by theoperation would be of the order of a few gallonsin an emulsified form and essentially undetectable.

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Since the cleaning operation is essentially ahot detergent flush using a solution containingno heavy metal inhibitors 'or other compounds in asystem fabricated almost entirely of iron and coppex,we believe that analyzing for heavy metals (otherthan iron and copper) is not recpxired.

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A similar request to the Michigan Water ResourcesCommission was made by letter dated December 7, 1976 forapproval to discharge the cleaning solution and rinse watersto the ground, through the absorption field, without holdupfor neutralization as planned. The Michigan Departmentof Natural Resources, Water Quality Division, by letter ofJanuary 13, 1977 did grant approval of this request. Copiesof these two letters are attached for your information asAttachment B and C, respectively.

A supplement to Table 2.2-1 is provided, as Attachment D

for your information and inclusion in the Environmental TechnicalSpecifications.,

We propose that the change would expire at thetime of Unit 2 initial criticality and would not changethe intent of the specification, which will still ensurethat the discharges to the absorption field are not adverselyaffecting the quality of the groundwater outside of theimmediate vicinity of the field.

Our schedule presently calls for this cleaningoperation to begin in the last week in April 1977 and wetherefore request your prompt review and approval of thisproposed change.

Very truly yours,

JT:mamAttachment

T inghVice Presid

cc: Sworn and subscribed to before methis/'7@day of March, 1977 inNew, York County, New York

! PmZxNotary Public

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DAVIDG. EGSIHNOTARY PUBLIC, Sate ol New York

No. 314608113Qualified ia New York County

Commission Expires March 30, 1979

see next page

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cc: G. CharnoffR. C. Ca1lenP. W. SteketeeR. WalshR. Z. VollenR. W. Zurgensen — BridgmanR. S. Hunter

Attachment A

The maximum annual discharges of phosphate and morpholine permitted in theSpecification correspond to normal operation 95X of the time of operationand operation at the maximum phosphate content and blowdovn rate for 5Zof the time. The rorpholine concentration is expected to be maintainedat 20 ppm in the blovdown at all times. Hydrazine villbe added to thesteam system as an oxygen-scavenging corrosion inhibitor'. At the. elevatedoperating temperature any of this chemical that has not reacted with oxygenvill decompose to nitrogen and ammonia. The maximum annual discharge per-mitted, in the specification is that corresponding to normal operation

. (0.02 ppm hydrazine) for 99X of the time of operation and the maxi~ con-centration (96 ppm) for a maximum of 1X of the operating time for times5ust before and after shutdown. It is assumed the plant vill operate SOXof the time in calculating maximum permitted releases.

~ Maximum discharge concentrations are calculated on the basis of a cir»culating vater discharge rate that is the mean of those for Unit 1 and

,Unit 2.II

No other plant corrosion or deposit inhibitors will be discharged to theplant environs.

2.2;3 OTHER C~ICAL DISCHARGES

2.2.3.1 ~Ob ective

The purpose of this specification is to control or limit the release ofchemicals, other than cor osion and deposit inhibitors, to the lake or.the onsite absorption field to preclude or minimize potentially adverseimpacts on aquatic or terrestrial biota due to plant operation.

Qe maximum quantities and discharge concentrations of other chemicalsused in thc plant which will be discharged to the lake and to the onsiteabsorption field shall be 11z:ited to the values specified in Table 2.2.1.Chemicals used in the, plant shal'e diluted and neutralized as requiredto give a pH in the range of 5.5 to 9 prior to discharge to the onsiteabsorption field. Excepting chlorine, no toxic chemical, e.g., chromates,mercury ccmpounds, etc.. shall be discharged to the lake or onsite absorp-tion field.'o oil or petroleum products shall be discharged to the lakeor to the onsite absorpt'on field. The composition and quantity ofdetergents (Table 2.2-1) used and discharged to the lake shall be 'reportedin the annual Operating Reports.

On those occasions vhen spent chemical cleaning solutions are to be dis-charged to the absorption field, samples of the sump waste vater shallbe collected and analyzed for all chemical species (including heavy metals

Note: For the one time chemical cleaning of the Unit 2Condensate,. and Feedwater Systems, to be completed by the,time of Unit 2 initial criticality, the following exceptionsto Specification 2.2.3.2 apply-. Neutralization of cleaningsolution prior to discharge to the absorption field is notrequired, small quantities of hydrocarbon coatings or preservativesmay be discharged with the cleaning solution flush, of the orderof a few gallons, and sampling for heavy metals, other thaniron and copper, are not required.

2 2-4

Attachment B

December 7, 1976

Robert Courchainc, Chief EngineerMichigan Hater Resources CommissionStevens T. Mason BuildingLansing, Michigan 48926

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SUBJECT:

Dear Mr. Courchaine:

Donald C. Cook Nuclear PlantBridgm ~m, MichiganPreopcratiorral Cleaning of Unit 2Condensatc and Feedwater System

On July 10, 1974 the Michigan Nater Resources Commission issueda permit to 'the Xndiana 6 Michigan Power Company to dispose ofvarious liquid effluents to the ground at the sito of thc Company'8Donald C. Cook Nuclear Plant in Bridgman, Michigan (Permit H00064).This permit requires, among other things, that the Company"...obtain prior approval of thc Chief Engineer of the Commissionbefore discharging spent cleaning solvents or other chemicalwastes, other than spent regenerants, to the ground" (permit"Special Condition" I, page 3).

As part of the startup operations for Unit 2 of the Donald C.Cook Nuclear Plant it will be neces".:.ry to perform a hot deter-gent cleaning of the Unit 2 condensate and feedwater systems.The cleaning is a one-timo preoperational hot water flush witha mild alkaline solution to remove material left in the pipinginternals during construction and is expected to take place duringthe first quarter of 1977. A similar operation was performedon Unit 1 from July 16 through 20, 1973 prior to its startup.

The specific objectives of the preoperational cleaning are:

1. To loosen and remove debris not removedby prior water flushing.

2.. To remove from the system piping any oilymaterials and any rust preventatives appliedduring construction.

3. To form a protective oxide coating on thecarbon steel portions of the system.

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Robert Courchaine, Chief Engineer,December 7, 1976Page two

The cleaning will be done by circulating approximately300,000 gallons of a 180-190oF. solution of tri- and di-sodiumphosphate throughout the system for. approximately 12-24 hoursanQ then flushing to the absorption pond with approximately600,000 gallons of clean water.

The composition of the cleaning solution will be as follows:a. 3500 ppm Tri-Sodium Phosphate (Na3PO4)g

Approx. 8750 poundsyC

b. 1500 ppm Di-Sodium Phosphate (Na2HPO4),Approx. 3750 pounds;

c. 300 ppm Surfactant, Approx 750 pounds~ and

d. 200 ppm Anti-foaming agent, Approx. 500 pounds.

The cleaning solution and the rinse water will be drained fromthe condensate and feedwater systems to the turbine room sumpanQ then will be pumped to the absorption pond. Although thecleaning solution vill be highly alkaline (expected pH about 11.5),the large volumes of rinse water and lower pH water already in theabsorption pond is expect Q to reduce the pH of the mixture to'less than 9.0 prior to discharge into the ground. Thus, webelieve it would be unwise to add the approximately 10,000 poundsof neutralizing chemicals —sulfuric or hydrochloric acid--necessary to reduce the pH of the cleaning mixture to 9.0 priorto pumpout at the turbine room sump since this would unnecessarilyincrease the overall'mounts of chemicals discharged to the environ-ment.

Xn accordance with Paragraph I of Hater Resources CommissionPermit H00064, we request your approval to discharge tne cleaningsolution and rinse waters to the grounQ, through the r..bsorptionpond, without holQup for neutralization, as planned.

Very true yours,

G. E. LelfastersExecutive Assistant

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'cc: R.T.T ~

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W. JurgensenF. PlunkettA. KreiselE. SmarellaA. Druckomi lierW. Reeves

T. A. NiskimenF. J. Batchelder.J. E.

Sherwood'.

II. SteinhartG. W. PennockeL. Storch

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Attachment C

STATE OF MICHIGAN

NATURAL RESOURCES COMMISSION

CARL T. JOHNSON

E. M. LAITALAOEAN FRIOGEON

.HILARY F. SNELLHARRY H. WHITELEYJOAN L WOLFE

CHARLES G. YOUNGLOVE

WILLIAMG. MILLIKEN,Governor

DEPARTMENT OF NATURAL RESOURCESSTEVENS T. MASON 8UILOING, LANSING. MICHIGAN 46926

HOWARO A. TANNER, Olrcctor

January 13, 1977

Mr. G. E. LeMastersExecutive AssistantIndiana and Michigan Electric Company2101 Spy Run AvenueP. 0. Box 60Fort Wayne, Indiana 46801

SUBJECT: Donald C. Cook Nuclear Plant

Dear Mr. LeMasters:

This is in'eply to your December 7, 1976, letter regarding preoperationalcleaning of Unit 2 Condensate and Feedwater System.

We agree with your. assessment that the addition of neutralizing chemicalsare not necessary and are hereby granting approval of your request with

. the following condition:

Residual free oils must be removed from the turbine room sump prior to the~flushing oper'ation.

Feel free to call us if you have q'uestions regarding this matter. We askthat you notify us as to the exact date and times that the cleaning

operation'ill

take place, as soon as this has been determined.

Very truly yours,

WATER QUALITY DIVISION

RJC/hbcc: W. Denniston

C. Harvey

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Robert J. Cour aineDivision Chief

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Attachment D

TABLE - 2.2-1 (cont'd)

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OTIIL'R CIIEMICAL DISCIIABGES TO TIIE ENVIRONS

Chemical

Tri- and DiSodiumPhosphate

Estimated Maximum AnnualDischar e er e r

12,500 lbs.

Estimated Maximum DischargeConcentration m

5q000

Use 8c l'stimated DischargeDi.".c!mr~eFr~eu en c 'J'o

On siteUsed for Pre" Absorptionoperational chemical Pondcleaning of theUnit No. 2 Con"densate and Feedwater Systems 'i-

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