ML20072G314

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Responds to IE Bulletin 83-03, Check Valve Failures in Raw Water Cooling Sys of Diesel Generators. Info Requested by Action Items 1,2, 3 & 4 Re Pump & Valve Inservice Program Encl
ML20072G314
Person / Time
Site: Beaver Valley
Issue date: 06/07/1983
From: Carey J
DUQUESNE LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
REF-SSINS-6820 IEB-83-03, IEB-83-3, NUDOCS 8306280435
Download: ML20072G314 (8)


Text

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'Af Tele &done (412) 4564000 Nuclear Division '

P.o. Box 4 SNppingport, PA 150774004 U. S. Nuclear Regulatory Commission Office of Inspection & Enforcement Attn : Acting Regional Administrator Region 1

, 631 Park Avenue King of Prussia, Pennsylvania 19406

Reference:

Beaver Valley Power Station, Unit No.1 Docket No. 50-334, License No. DPR-66 IE Bulletin 83-03 Gentlemen:

We have reviewed IE Bulletin 83-03, " Check Valve Failures in Raw Water Cooling Systems of Diesel Generators". Attached is the information requested by Action Items 1, 2, 3, and 4 of the Bulletin. The remaining information required by Action Item 5 will be submitted at a future date in accordance with the requirements of the Bulletin.

Please note that we intend to perform the valve integrity verifica-tion procedures at the frequencies listed in Table 1, which are more limiting than the requirements of the IST program listed in Attachment 2.

Our estimate of the manpower expended in conducting the review and preparing this response is 170 manhours.

If you have any questions concerning this response, please contact my cffice.

Very tr y'yours, J. . Carey Vice President, Nuclear cc: Mr. W. M. Troskoski, Resident Inspector U. S. Nuclear Regulatory Commission Beaver Valley Power Station Shi pingport, PA 15077

. S. Nuclear Regulatory Commission c/o Document Management Branch Washington, DC 20555 8306280435 850607 PDR G

ADOCK 05000334 <

PDR ll

COMMONWEALTH OF PENNSYLVANIA)

) SS:

COUNTY OF BEAVER )

On this day of , /fd8 , before me, duldW.,M#xc4As, a Notarp Public in and for said Commonwealth andCounty,personallyappearedJ.J.Carey,whobeingdulfsworn, deposed, and said that (1) he is Vice President of Duquesne Light, (2) he is duly authorized to execute and file the foregoing Submittal on behalf of said Company, and (3) the statements set forth in the Submittal are true and correct to the best of his knowledge, information and belief.

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sugitA u. FATTORE, NOTARV PutttC smpptgGPORT 8080, SEAVER COUNTY ,

av C0mmt$$105 EXPtRES SEPT.16,1965 Member. Pe@enie Association of httaries -

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. e ATTACHMENT 1 Response to IE Bulletin 83-03 Ttem 1 Licensees are requested to review the plant Pump and Valve In-Service Test (IST) program required by Section XI of the ASME Boiler and Pressure Vessel Code and modify it if necessary to include check valves in the flow path of cooling water for the diesel generators f rom the intake to the discharge. Those portions of the cooling water system which do not directly supply the diesel may be excluded from this review. For example, if the cooling water to the diesel is supplied by the normally operating service water system, the loop of piping to the diesel from the service water piping and back must be considered, but not the complete service water system. For those cooling water systems which come into operation only upon demand for diesel cooling, all portions of the system which are required to change state must be reviewed.

Response

The Pump and Va,1ve In-Service (IST) Program has been reviewed to determine if it includes all the check valves in the flow path of cooling water to the diesel generators cooling system heat ex-changers. Nine valves are considered applicable to this bulletin, seven of which are already part of the IST Program. The other two valves have been added to the program. Table 1 lists all nine of these check valves. The check valves in the auxiliary river water system are not considered applicable to this bulletin since this system is not the normal flowpath for cooling water to the diesel generators cooling water heat exchangers.

Item 2

( For the valves described in (1) above, licensees are requested to examine the IST program and mudify it if necessary to include veri-fication procedures that confirm the integrity of the valve internals.

, This may be accomplished by using both a forward flow and a back I

flow test or by valve disassembly and inspection. Other equally effective means of assuring integrity of the valves may be used. A reasonable schedule for the test of these valver shall also be in-cluded in the IST program.

Response

The IST Program has been modified (Attachs4nt 2) to include verifica-tion procedures that confirm the integrity of the valve internals as listed in Table 1. Three of the check valves will be tested by performing forward and reversa flow tests. The remaining six will be disassembled and inspected to confirm the integrity of the valve internals. The IST Progrdm modifications include the frequency

schedule for testing.

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. , Attcchment 1 R2sp2as3 to IE Bu11stin 83-03 Pcgs 2 Item 3 Licensees are requested to perform initial valve integrity veri-fication procedures for the valves identified in (1) above using the rethods described in (2) abcve, to be completed by the end of the next refueling outage commencing after April 1, 1983.

Response

The initial valve integrity verification will be performed for the check valves listed in Table 1 during the third refueling outage, scheduled to begin June 11, 1983, with the exception of valves (RW-110, 111, 112 and 113]. These four valves will be replaced as part of Design Change Package 369 and will be installed at the first scheduled outage af ter January,1984 which accommodates the required work. Since these valves are scheduled for replacement and were just installed in 1980, they will not be checked during this outage.

Item 4 Licensees are requested to submit a report to the NRC within 90 days of the date of this bulletin, which lists the valves identified in (1) above and describes the valve integrity verification pro-cedure methods and schedule identified in (2) above. This report should include the history of any known previous failures of these valves at your plant.

Response

Table 1 lists the check valves applicable to Item 1 and describes the valve integrity verification procedure methods and a schedule for testing in accordance with Item 2.

Previous failures of these valves have occurred and are documented in LER 80-27. The LER reported that during maintenance of a diesel generator cooling water heat exchanger, the Laternals of a river water flapper-type check valve were discovered in the cooler. The valve failure was caused by a combination of corrosion of the carbon-steel valve atl valve flutter. In September,1980, similar valves of this type were replaced with stainless steel valves.

Item 5 Licensees are requested to submit a report to the NRC within 90 days of completion of the results of the initial valve integrity verifica-tion procedure performed in accordance with (3) above. For those valves which are found to have undergone either partial or complete disassembly of valve internals, a description of tha failure mode should be included.

Response

The results of the initial valve integrity verification procedures to be performed during the third refueling outage will be reported within 90 days of completion of the results.

TABLE 1 Valve Integrity Verification Methods Valve No. Forward Reverse (UTSAR Flow Test Frequency Flow Test Frequency Fig. No.)

1RW-106 CST 1.30.2 Monthly Disasseeble and In- 40 months (9.9-JA) "-

spect in conjunction with the ISI hydro en buried River Water lines 1RW-107 OST 1.30.3 Monthly Disassemble and In- 40 months (9.9-1A) spect in conjunction with the ISI hydro on buried River Water lines 1RW-110* OST 1.36.1 Monthly Dis &ssemble & Inspect 5 yrs.

(9.9-1A) Per CMP 1-75-186 1RW-lll* OST 1.36.1 Monthly Disassemble & Inspect 5 yrs.

(9.9-1A) Per CMP l-75-186 I 1RW-112* OST 1.36.2 Monthly Disassemble & Inspect 5 yrs.

(9.9-1A) Per CMP l-75-186 1RW-ll3* OST 1.36.2 Monthly Disassemble & Inspect 5 yrs.

(9.9-1A) Per CMP l-75-186 1RW-57* OST 1.30.2 Monthly OST 1.30.3 and 6 Monthly (9.9-1B)

IRW-58* OST 1.30.3 Monthly OST 1.30.2 and 6 Monthly (9.9-1B) 1RW-59* OST 1.30.6 Monthly OST 1.30.2 and 3 Monthly (9.9-1B)

  • Valves previously in the IST Program

ATTACHMENT 2 ,

1 SYSTEM NAME River Water MANllAL NUMBER 30 pggg 49

$ I Valve $

Valve Category Nh N *f 0 *U M rk g ye gy, yg jg Number e < mj eo m e' ra o-g Type y gg y0 $j yy Testing and Tracking A B C D E lhW57 3 X VCI15C RM127B F-2 Q OST 1.30.2 - Monthly Test "[p f CN3 L P"E 3

RM127B F-3 OST g 3 g - Monthly Test r.nd Backseat per 1RW58 3 X VCIl5C Q

_lRW59 3 X VCIl5C RM127B F-4 Q osTbTY.3072M o nthlY TUSt and Back8 eat Per 1RW60 3 X X WF15A LS RM127B E-4 Q OST 1.47.3A (Unit 2 Supply) 1RW61 WF15A S RM127B E-2 NSR - OST 1.1.9 - Refueling stroke IRW98 3 X .

X VBS15C LS RM127B D-3 Q OST 1.47.3A (Unit 2 Supply) 2 X RV RM127B D-1 ST Tested per independent laboratory

[lRW101A l1RW101B 2 X .RV RM127B E-1 ST Tested per independent laboratory

!1RW101C 2 X 'RV RM127B F-1 ST Tested per independent laboratory IRW101D 2 X 'RV RMl?7B F-1 ST Tested per independent laboratory l1RW102A 3 X RV RM127B B-3 ST Tested per independent laboratory 1RW102Al 3 X MOV S RM127B F-2 g OST 1.47.3A - Quarterly stroke and time IRW102A2 3 X MOV 0 RM127B F- 2 Q OST 1.47.3A - Quarterly stroke and time IRW102B 3 X RV RM127B B-3 ST Tested per independent laboratory IRW102B1 3 X MOV S RM127B F-3 Q OST 1.47.3A - Quarterly stroke and time IRW102B2 3 X MOV S RM127B F-3 Q OST 1.47.3A - Quarterly stroke and time 1RW102C 3 X RV RM127B C-3 ST Tested per independent laboratory IRW102Cl 3 X MOV S RM127B F-4 Q OST 1.47.3A - Quarterly stroke and time IRW102C2 3 X MOV S RM127B F-4 Q OST 1.47.3A - Quarterly stroke and time IRM101A 't Y %OV S RM127A D-4 Q OST 1.30.4 - Monthly stroke and time

River Water MANUAL NUMBER 30 PAGE 53 .

SYSTEM NAME,. ,,

$ c u e Valve

" " * *N b "

Mark m # "E Y $

14 umber U < Ef .E $ Nb S g Type g g3 yj yj yy Testing and Tracking A B C D E 1RW221 3 X VCIl5C RM247 E-3 Q OST 1.30.1A - Monthly Stroke 1RW222 3 X VCI15C RM247 E-4 Q OST 1.30.1B - Monthly Stroke IRW275 N X VGW15A LO ,RM127C E-3 Locked or scaled valve log 1RW276 N X VGW15A LO RM127C E-4 Locked or sealed valve log 1RW2'77 3 X VCW15A RM247 E-3 Q OST 1.30.1A - Monthly stroke litW2'78 3 X VCW15A RM247 E-4 Q OST 1.30.1B - Monthly stroke IRW481 3 X VGW15A LO RM127B F-2 Locked or. sealed valve log 1RW482 3 X VGW15A LO RM127B: F-3 Locked or scaled valve log 1RW433 3 X VGW15A LO RM127B F-4 Locked or sealed valve log 1RW4d4 3 VGW15A LO RM127B P-5 NSR - Locked or sealed valve log 1RW485 3 VGW15A LO RM127B F-5 NSR - Locked or sealed valve log 1RW486 3 X VCW60A RM127B F-2 OST 1.30.2 - Monthly stroke and Backseat per OST 1.30.3 l 1RW487 3 X VCW60A RM127B F-3 UST 1.30.3 - Monthly stroke and Backseat per OST 1.30.2 1RW488 3 X VCW60A RM127B F-4 OST 1.30.6 - Monthly stroke and Backseat per OST 1.30.2 l 6-8-83

. 1 SYSTEM NAME River Water ,

MANUAL NUMBER 30 PACE 53a *

$ U u e Valve

" *" u *E

  • y "g Mark e Category Sy A

$gu y Number m

e 4 s e m 4 o aa'o mo g Type y g g@ jg g" j jj Testing and Tracking A B C D E i

l Per CMP 1RW-110 3 X VCI-15C RM127 F, S Q OST 1.36.1 and Internal Inspection 1.75.181

! 1RW-111 3 X VCI-15C RM127 F-5 Q Og[ M*E8gndInternalInspectionper l 1RW-112 3 X VCI-15C RM127 G-5 Q @jJ  :)hyggndInternalInspectionper rn IS Per 1RW-l'13 3 X VCI-15C RM127 G-5 Q hff:hk'f86 1RW-106 3 X RM127 F-8 M Forward Flow OST 1.30.2 i Reverse Flow in Conjunction with RW liydro i 1RW-107 3 X RM127 F-8 M Forward Flow OST 1.30.3 l Reverse Flow in Conjunction with RW Hydro k

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