ML17277B174

Forwards Recommendation for Revised Limiting Condition for Operation (Lco),Allowing Safe Operation W/Containment Vent & Purge Valve Mod.Lco Proposed by NRC Would Impact Ability to Carry Out Initial Power Ascension Testing

ML17277B174
Person / Time
Site:	Columbia
Issue date:	12/08/1983
From:	Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Schwencer A Office of Nuclear Reactor Regulation
Shared Package
ML17277B175	List: ML17277B174 ML17277B176
References
GO2-83-1129, NUDOCS 8312190068
Download: ML17277B174 (6)

Text

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ACCESSION NBR: 8312190068 OOC, DATE: 83/12/08 NOTARIZED:

NO DOCKET FACIL:50<<397 NPPSS Nuclear Project~

Unit 2r Washington Public Powet'5000397 AUTH',NAME AUTHOR AFFILIATION SORENSKN<GBC ~

l'lashington Public Power Supply System RECIP ~ NAME RECIPIENT AFFILIATION

'SCHHENCERiA ~

Licensing.-Branch 2

SUBJECTS Forwards recommendation for.revised limiting condition= LCO oper ationral'lowing safe operat'ion w/containment vent L purget valve mod.LCO proposed by NRC would impact ability to carry out initial power ascension"testing=

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il Washington Public Power Supply System P.O. Box 968 3000 George Washington Way Richland, Washington 99352 (509) 372-5000 December,8, 1983 G02-83-1129 Docket No. 50-397 Director of Nuclear Reactor Regulation Attention:

Mr. A. Schwencer, Chief Licensing Branch No.

2 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.

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Subject:

NUCLEAR PROJECT NO.

2 QUALIFICATION AND OPERATION OF WNP-2 CONTAINMENT VENT 5 PURGE VALVES a)

Letter, A. Schwencer (NRC) to R. L. Ferguson (SS),

"Request for Additional Information", dated September 16, 1982 b)

NUREG-0892, WNP-2 Safety Evaluation Report, Out-standing Issue No. 26, "Operability of Purge Valves" c)

,Letter, G02-83-170, G.

D. Bouchey (SS) to A. Schwencer (NRC}, "Vent 8 Purge Valves", dated February 24, 1983

'd}

Letter,'02-83-550, G.

D. Bouchey (SS) to A. Schwencer (NRC), "Qualification of WNP-2 Containment Vent and Purge Valves", dated June 22, 1983 References a and b contain NRC requests for information regarding the WNP-2 containment vent and purge valves and References c and d are the Supply System's responses to the requests.

These concerns have resulted in an NRC proposed Technical Specification Limiting Condition for Operation (LCO),

for WNP-2 (Attachment A}.

This LCO would seriously impact the WNP-2 plant's ability to properly carry out initial power ascension testing and operation.

The purpose of this letter is to bring to the NRC's attention, additional infor-matiori concerning the Supply Systems action to resolve this issue and to propose an alternate Technical Specification LCO (Attachment B).

This, LCO is consistent with the LCO that provides for the drywell and suppression chamber atmosphere inerting (Reference Technical Specification 3.6.6.2} and will allow compliance capability.

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A. Schwencer Page Two December 8, 1983 QUALIFICATION AND OPERATION OF WNP-2 CONTAINMENT VENT 5 PURGE VALVES The Supply System is aware of NRC concerns which resulted from the staff's review of references c and d.

These concerns have been discussed with the Equipment gualification Branch and their consultant.

The result of these discussions is the Supply Systems commitment to limit the valve opening angle to a point that provides a maximum air velocity equal to or below a Hach number of.3.

This corresponds to a maximum valve opening of no more than 70 degrees (with full open equal to 90 degrees).

Appropriate valve limiting devices will be installed prior to exceeding 5X power.

A revised package detailing the field modification to limit valve opening and demonstrate that the information provided in references c and d is appropriate with this valve opening limit will be provided by December 16, 1983.

Based on the Supply System commitment to limit valve opening, it is understood that the LCO which now requires that they be locked sealed closed may be relaxed.

Provided in Attachment B is the Supply System recommendation to a revised LCO that would allow Safe Operation of WNP-2 with the subject valves appropriately modified.

The Supply System's planned December 16 submittal will provide the appropriate data to address the concerns now in place.

Should you have any further questions, please contact Mr. P. L. Powell, Manager, WNP-2 Licensing.

'ery truly yours, G.

C. Sorensen, Manager Regulatory Programs JER/tmh Attachments cc:

R Auluck - NRC WS Chin - BPA AD Toth -

NRC Site R Wright -

NRC D Hoffman -

NRC F Eltawila -

NRC

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