ML20113G673

Forwards Request for Relief from Second 10-yr Inservice Testing Program for ASME Section XI Quarterly Test Requirements for Verification of reverse-flow Closure of Check Valves

ML20113G673
Person / Time
Site:	Farley
Issue date:	04/10/1992
From:	Woodard J SOUTHERN NUCLEAR OPERATING CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9204160033
Download: ML20113G673 (3)

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l~ p Southem Nuclear Operatino Comnany Post Offce Box 1295 i

Bamingham, Alabama 35201 Telephone 205 868 5086

3. o m ,,, Southem Nudear Operating Company l Vce President . April 10, 1992- the southem electue system l

'"' ** "' # 10 CFR 50.55a(g)

Docket No. 50-348  :

I U. S. Nuclear Regulatory Commission 1 ATTN: Documen; Control Desk Washington, DC 20555 Joseph M. Farley Nuclear Plant - Unit 'l i inservice Testing Program for ASME Code Classes 1, 2 and 3 L Pumos and Valves - Reauest -for- Relief- from Imoractical Reauirements

. Gentlemen:

! Enclosed for review and granting'of .reNef is submittal 7 to thei dnit-i-

>- Inservice Testing (IST)' Program. This submfttal concerns ASME Section XI:

(IWV-3521) quarterly test requirements- fo& verification of reverse-flows

closure of check valves. The subject valves are located in the instrument air system and provide a backup nitrogen supply to the pressurizer PORVs. -

Details are provided in a revised relief request QlP19-RV-3, which. is - -;

enclosed.

Relief request QlP19-RV-3 was first submitted .to the NRC by letter dated July 26, 1991. As a result'of comments received'from the.NRC at-a meeting on December 16, 1991, this relief us re-sub.ni?ted to the NRC on -

December 30, 1991. Following further evaluation by Southern Nuclear Operating-Company (SNC), the. request- for relief:has;been revised to provide for valve disassembly at each refueling on;a staggered t_est. basis in~ lieu -

of reverse-flow closure verification. : Valve disassemOy was- determined:to be the only viable and complete method. for ensuring proper ASME Code -..

testir9 on the subject l valves. :The ; basis for this- request -for:reliefe is :

identical- to a_ Unit 2 relief request Q2P19-RV-3 which was. submitted to the NRC on December 30, 1991. This request:for: relief received interim approval by NRC . letter. dated February -14,1992.

As 1!he subject valves require testingjduring refuelingzoutages, the?

regt.ested relief is needed prior to thC ..exc--Unitsll refueling outage, tentatively scheduled to begin _ September: 11,.1992.~ ~Therefore, it is ,

respectfully requested-that this relief request be granted by September 11, F 1992.-

If there are' any questions or if additional information isLneeded, please advise.

Respectfully! submitted,-

u

'J .Q L - Woodard A.

i s JDW/EFB: map _

v cc: Mr. S. D. Ebnetar j

,r MI' S. T. Hoffman ,-! t o

id 0u,r 41rv n a. F. Maxwell '

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. f9204160033l920410' PDR_-ADOCK 05000348

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ENCLOSURE Summary of Submittal 7 Rollet Requests to the J. M. Farley Nuclear Pcwer Plant Unit No.1 Second Ten Year Inservice Testing Program for ASME Code Class 1,2, cad 3 Pumps and Valves Descriot!cn/ Reason for Chan.22

1. Relief Request 01P19-RV-3: Revised "Alternato Testing:' to provide for valve disassembly at each refueling on a staggered test basis la lieu of reverse-flow closure verification. Reconsideration by -

FNP per FNP 92-0120 dated 3/10/92 from D. N. Motey to J. E. Garlington.

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- FNP 1 M442 REUEF REQUEST Q1P19-RV 3 System: instrument A!r Valve: NV135, NV137A. NV137B

'a Category: C 2

Class: NA

.A ftm'on: Backup nitrogen supply to pressurizer PORVs. 3 ASME Section XI .

Quarterly Test .

O Requirements: Verify reverse-flow closure. (lWV 3521)

Basis for Rollef: There are no system design provisions for vertlicatior, of reverse now closure and :

testing wBl require isolation and venting of the Instrumer:t air header. Instrurnent air supplies a number of componerts inside containment which are necessary for.-

normal operation! , Testing during nonnal operation or at cold shutdown would deprive these components of their normal av supply, and since the system has noi reserve air storage capacity, could result in operating transients or component faBures. ' Loss or instrument alt during normal cperation could result in a forced plant shutdown.'

Altomate Testing: One of these vanes wSI be disassembled and manuaRy fd stroke toteted at each refueling on a staggered test basis.c The valve intamals wul be vertlied as.

structurally sound (no loose or corroded parts) and the disk manuaRy exercised to -

. verify full stroke capabuity.cif the disassembled valve is not capable of being full -  ;

stroke exercised or there is binding or fature of valve intamals, the remaining J valves in that group'must be disassembled, inspected,' and manudy fur stroke-exercised during the same outage.'

3 The disassembled valve will be part stroked with flow after reassemblyi- Flow-Indication wSi be through installed instrumentation,Lobserved pressure changes, level changes or through the use of ultrasonic (or sirellar) Sow' measuring dwices.

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