ML20196B934

Forwards Response to 880324 Request for Addl Info Re Util 870904 Response to NRC Bulletin 85-003.Water Hammer Due to Valve Closure Not Initially Considered in Determination of Differential Pressures Performed,Per Bulletin

ML20196B934
Person / Time
Site:	Vogtle
Issue date:	04/25/1988
From:	Mcdonald R GEORGIA POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
IEB-85-003, IEB-85-3, SL-4558, NUDOCS 8812070097
Download: ML20196B934 (11)

Text

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Q fl}9 orgia Power Company 333 Piedmont Avenue I' Atlanta, Georgia 30304 -

Telephone 404 526-6526 Georgia Power 7,, g .... ,o....~ .w-Post Office los 4545 Atlanta, Georgia 303M h-7h SL-4554 09660 X16311-V110 April 25, 1964 U. 5. Nuclear Regulatory Comission Atta: Document Control Oesk g- l ,

Washington, D. C. 20555 2 2 - v Mu.o -

PLANT V0GTLE - UNIT 1 j NRC DOCKET 50-424 i OPERATING t.lCENSE NPF-64 RESPONSE TO NRC OULLETIN 85-03

, REQUEST FOR ADDITIONAL INFORMATION Gentlemen

' The subject NRC request for additional information, dated March 24, 1988 transmitted four questions 85-03. ofThe clarification concerning our September 4, 1981 response to Bulletin Georgia Power Company's clarifying rt.sponse is l

provided as inclosures 1 and 2 to this letter. If you have any questions in this regard, please contact this office. L

) Sincerely.

l R. P. Mcdonald Executive Vice President Nuclear Operations MJt/ju inclosure 1: Response to NRC Bulletin 85-03 Request for Additional Information 39 Enclosure 2: Revised Tables #1 and #2 f rom GPC September 4,1981 response to M"t e

tulletin 45-03 I b' c: Georsi a Pow r Comoany Mr. F.' b. 4' ce, vice President and Vogtle Project Director l Rhi Mr. 4. lockheid, Jr... General Manager - Plant Vogtle gg 60-NORN5

! se i 8 U.1. Nuclear Regulatory Consistion. Washington. O. C. l gg I

cc c.o Mr. J. 6. Hopkins, Licensing Project Manager - Vogtle (2- copies) j O h

U. 5. Nuclear Requiatory Congnission. Region 11 I

(* - N g/

Dr. J. M. Grace, Regional Administrator 'h 1 ,

Mr. J. F. Rogge, Senior Resident inspector. Operations - Vogtle

. . i ScorgiaPower A ENCLOSURE 1 Pl.MT V0GTLE - UNIT 1 NRC 00CXET 50-424 OPERATING LICENSE NPF-68 RESPONSE TO NRC SULLETIN 85-03 RE00EST FOR ADDITIONAL INFORMAff0N_

In this enclosure Georgia Power Coogany (GPC) presents its response to dated Marchrequest the NRC's 24, 1988.for additional information regarding NRC Bulletin 55-03 questions based The NR1's letter requested answers to four specific on our earlier submittals for Bulletin 85-03 "Motor-Operated Valve Improper Switch Settings". Common Mode Failures Ouring Plant Transients Due to September 4, 1987, He note that our earlier correspondence, e.g.,

referred only to the program for Unit 1, with the program for Unit 2 held in abeyance. GPC continues that approach in this response identical to that of Unit 1.even though the Unit 2 response may eventually be si The GPC answers to the NRC's questions on Hotor Operated Valves (HOVs) are presented in a question - inswer format.

Question 1:

"Has water hammer due to valve closure been considered in the deterc! nation of pressure differentials? If not, explain."

GPC's Response to Question 1:

Hater hanner due to valve closure was not initially considered in the determination requirements of ofBulletin differential pressures (dP) performed pursuant to the 85-03. The precisa co for water hammer to affect valve closure was no!ncident timing required event. t considered a credible However, GPC now intends to use the methodology free Appendix 3 to NEDC-31322 "8NROG Report on Operational Design Basis of Selected MOVs' (tI44) to calculate additional dPs due to water hanner.

Corrections will be made to the initial dP values and any required re-evaluations of MOV acceptability will be performed. These additional calculations and re-evaluations will require time beyond that provided by the sub,1ect request for information due to their congtexity. Therefore, GPC requests a sixty (60) da 22,1968 for providing a final response to this it:a.y extension to June Question 2:

"If H0 VATS is planned for application to some HOVs which are not included in its database, commit to and describe an alternate method for determining the extra thr differentials for these valves , ust necessary to overcome pretsure 0966U El-1

,$L-4558 04/25/88

Geory,laPower A

! ENCt.050Rt 1 (continued)

RESPONSE TO NRC SULLETIN 85-03 REQUEST FOR ADDITIONAL INFotMATI001 GPC's Response to Question 2:

In GPC's resp (ns'e' to Bulletin 85-03, dated September 4, 1987, fort:f-nine (49)  !

requLrements fofthe valves Sulletin. were identified for testing pursuant to the Twenty-two of those dynamic dP Miting and were found to be acceptable. valves received The remaining twenty-seven (27) valves were not dynamicall ident M td in our September 4,19G8 subalttal. y dP tested for reasons database in an attemptIn order:oncern. to answer GPC the above will review theNRC MOVATS ,

valves as well as valves R-5154 ani! W-5155 (see Respo GPC's previous correspondence on tht'. subject did not make use of the ;

database time. since it was in 'the thitial stages of development at that addressed Any valves which cannot be qualified in this manner will be by alternative methods on a case-by-case basis. These your letter of March 24,1944. additional evaluations cannot be performe  ;

l day extension to June 22, 1988 Therefore, GPC requests a sixty (60) to provide a final response to this item. i Question 3:

l

' Unlisted MOVs W-5154 and W-5155 are shown normally open in etnifo!

(sic) drawings Ilnes of the actor-driven AFM puses. In zones C-4 and a-4 of IX404141-2 i (Unit 2). Revtsion 20 (Unit 1) and 2X408141-2 Revt son 15 l the NOG Report dated March 1984.These valves are shown as hyp include these valves Revise the res l or justify their exclusion.ponse of 09-04-47 to i equipment operations,, as required by Action Ites A of the bulletin.' Assu! i GPC's Response to Questtoa 3: l yh {

GPC 5eptemberadded 4, valves,W 5154 and W-5155 to Tables #1 and #2 of the taclosure 2 to1987--responserThe this letter. revlied Tables are provided as the previous GPC response since they are normallThese valves were i required to open during accident conditions, i.y e.,

valves.

open valves not normally which are active l

Questiondi

'The proposed crogram for Action Items 8. C and 0 of the bulletin is  !

Incomplete. Provide the following details as a minimum.  !

09660 SL-4554 El-2  !

04/25/88 '

l

GeorgiaPower A ENCLOSURE 1 (continued)

RESPONSE TO NRC SULLETIN 85-03 AEOUEST FOR ADDITIONAL INFORMATION (a) Conseltment to a trainin program for setting switches, maintaining valve operators,g using signature testing equ and interpreting signatures, and (b)

Comeltment to justify continued operation of a valve determined to be Inoperable (for Unit 1 only)."

GPC's Response to Question 4(a):

Training on the mt.intenance "Motor Operated of MOVs *is contained in Course EL-440 Valve Maintenance."

hours in length and includes instructionThis course is approximately 40 adjusting and testing actuator components. on cleaning inspecting, of both torque switches and 11att switches is included in Trainin the on the use of signature trace equipment is included in Course EL-210 NOVATS".

This course is approximately 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in length and (MOVATS) as well as the interpretation of the valve GPC's Response to Question 4(b):

VEGP states: administrative procedure 00150-C "Deficiency Control", Step 4.2.1 require that a Deftetenc"Conditions listed below if Ell met or cosolte be identified if known. y Card be written. Preliminary causes are to Enuinmaat o Systen lineup correct for plant condttions o Equipment within T/S requirements o Response / parameters normal testing during operation, maintenance, or o

Unplanned system / component actuations occur as expected o Material and equipment meets specifications requirements." and procurement If a valve is determined ensure that the condition is evaluatedto be inoperable, a Deficiency Card will for reportability, compilance with Technical Spectftcations, continued operation. and significance to plant conditions and These training courses and the procedure referenced above, or their conforming replacements, will be maintained for the duration of Plant Vogtle's operation.

_ g6{ El-3

,,, ,,,,, .A4/75/44 . . -

1 .

GeorgiaPower A ENCLOSURE 2 PLANT V0GTLE - UNIT 1 NRC DOCKET 50-424 OPERATING LICENSE NPF-64 RESPONSE TO NRC BULLETIN 85-03 I RIOUEST FOR ADDITIONAL INFORM g g Revised Tables #1 and #2 from GPC September 4, 1947 responto to Bulletin 85-03 1

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