ML20077J802

Application for Amend to Licenses NPF-4 & NPF-7,simplifying & Clarifying Requirements for Controlling Potentially Flammable Gases in Waste Gas Decay Tank

ML20077J802
Person / Time
Site:	North Anna
Issue date:	07/30/1991
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20077J805	List: ML20077J802 ML20077J818
References
90-621A, NUDOCS 9108050142
Download: ML20077J802 (3)

Text

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< o VlltOINIA 1$LECTitIC ANI) I'OWElf COMI%NY H ICll M ONil, VIItO I N I A 20061 July 30, 1991 U.S. Nuclear Regulatory Commission Serial No.: 90-621 A Attention: Document Control Desk NL&P/JDH R2 Washington, D.C. 20555 Docket Nos.: 50-338 50 339 License Nos.: NPF-4 NPF-7 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 PROPOSED TECHNICAL SPECIFICATION CHANGE

WASTE GAS DECAY TANK - SUPPLEMENT On October 22,1990, Virginia Electric and Power Company requested amendments, in the form of changes to the Technical Specifications, to Operating License Numbers NPF-4 and NPF-7 for North Anna Power Station Units 1 and 2, respectively. The requested amendments were to simplify and clarify requirements for controlling potentially flammable gases in the waste gas decay tank.

A subsequent discussion between Virginia Electric and Power Company and the NRC regarding this Technical Specification change request was held April 4,1991. The NRC requested that-we provide additional required actions and clarify purging operations. Attachments 1 and 2 are the affected Technical Specification pages with the additional action requirement included. The additional requirement is to submit a Special Report whenever the oxygen limit of 2% by volume !n the waste gas decay tank is exceeded for more than 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. The proposed change is discussed in-Attachment 3. - The change does not alter the intent of our October 22,1990 request nor_does it affect our original determination that the proposed change involves no significant hazards consideration as defined by 10 CFR 50.92.

Regarding purging operations, standard maintenance practice is to first purge the tank with nitrogen, then air, before initiating maintenance.

Should you have any questions or require additionalinformation, please contact us.

Very truly yours,-

, .L /

(A ) h W. L. Stewart Senior Vice President - Nuclear l , 00-91080'30142 91073o i PDR ADOCK 0500o338 '1\

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l Attachments 1

1. Changes for North Anna Unit 1

2. Changes for North Anna Unit 2

3. Discussion of Proposed Changes cc: U.S. Nuclear Regulatory Commission Region ll 101 Marietta Street, N.W.

Suite 2900 Atlanta, GA 30323 Mr. M. S. Lesser .

NRC Senior Resident inspector North Anna Power Station Commissioner Department of Health Room 400 109 Go /ernor Street Richm';nd, Virginia 23219 l

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COMMONWEALTH OF VIRGINIA )

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COUNTYOF HENRICO )

The foregoing document was acknowledged before me, in and for the County and. Commonwealth aforesaid, today by W. L. Stewart who is Senior Vice President - Nuclear, of Virginia Electric and Power Company. He is

l. duly authorized to execute and file the foregoing document in behalf of-that Company, and the statements in the document are true to the best of his knowledge and belief.

Acknowledged before' me this 367[ day of ////A ,19 9/ .

My Commission Expires: dzy 3d fi9 9Y, U ,

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Notary 'Public i

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(SEAL) 1