ML20095L237

Application for Amends to Licenses NPF-4 & NPF-7,changing Current TS for Svc Water to Permit Progression Through Modes Once Design Basis Met

ML20095L237
Person / Time
Site:	North Anna
Issue date:	05/01/1992
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20095L238	List: ML20095L237 ML20095L240
References
92-268, NUDOCS 9205070005
Download: ML20095L237 (6)

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VIHulNIA l'l1.ECTHIC AND l'OWEH COMA %NY ltiriinnuti,Vinoisia ununi May 1, 1992 l U.S. Nuclear Regulatory Commission Serial No.: 92 268 Attention: Document Control Desk NL&P/JYR ,

Washington, D.C. 20555 Docket Nos.: 50 338 l

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50-339 License Nos.: NPF-4 .

NPF-7 l Gentlemen:

VmGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 PROPOSED TECHNICAL SPECIFICATION CHANGES Pursuant to 10 CFR 50.90,-the Virginia Electric and Power Company requests amendments, in the form of changes to the Tochnical Specifications, to Operating Licene.e Numbers NPF-4 and NPF-7 for North Anna Power Station Units 1 and 2.

respectively. The proposed change will revise the current Technical Specifications for service water to permit progression through modes once the design basis has been mei.

. A discussion of the proposed change is provided in Attachment 1. The proposed changes are presented in Attachments 2 and 3 for Units 1 and 2, respectively.

.This request has been reviewed by:the Station Nuclear Safety and Operating

. Committee and the Management Safety Review Committee. It has been determined that this request does not involve an unreviewed safety question as defined in 10 CFR 50.59 or a significant hazards consideration as defined in 10 CFR 50.92. The -) asis for our determination that no signification hazards consideration is involved is presented in Attachment 4.

Should you have any questions or require additionalinformation, please contact us at your earliest convenience.

Very truly yours, ef

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. W. L. tewart l- Senior Vice President - Nuclear

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92o5070005 920501 /'

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, Attachments

1. Discussion of Proposed Changes

2. Proposed Technical Specification Change for North Anna Unit 1

3. Proposed Technical Specification Change for North Anna Unit 2

4. 10 CFR 50.92 Evaluation oc. 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 Nortn Anna Power Station Commissioner Department of Health Room 400 109 Governor Street Richmond, Virginia 23219

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COMMObWCALTH OFVIRGINIA )

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COUNTYOFHENRICO )

The.-foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by W. L._ Stewan who is Senior Vice President - Nuclear, of Virginia Electric and Power Company. He is duly authonzed 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 _ b- day of ( da , 1992,.

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. 4 Attachment 1 f

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Discussion of Proposed Changes

. North Anna Units 1 and 2 >

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DISCUSSION OF PROPOSED CHANGES Introduction The proposed change described herein is being made to Technical Specification 3.7.4.1.a. " Service Water System - Operating." The current Technical Specification action statement permits operation with one service water pump inoperable if component cooling heat exchanger service water flows are throttled. This action ensuros the remaining service water pumps will

, deliver design basis flows to the recirculation spray heat exchangers. Since design basis flows are met upon completion of throttling the component cooling heat exchanger service water flows, progression through modes would not be outside the design basis. However, Specification 3.0.4 does not permit modo changes once an action statement is entered. The proposed change will allow progression through modes once throttling of component cooling heat exchanger service water flows has been accomplished by stating that Specification 3.0.4 is not applicable.

Backaround.

License Amendment Nos.152 and 136 for North Anna Units 1 and 2, respectively, were issued on December 13,1991 for the service water system to ensure that the design basis for the system is met. Action Statement 3.7.4.1.a in these amendments allows continued operation for an unlimited time period provided throttling of component cooling heat exchanger service water flows, to ensure design basis flows to the recirculation spray heat exchangers, is completed. Currently, mode changes are not permitted under Specificatlom 3.0.4 oven through the design basis is met.

Generic Letter (GL) 89-07, " Sections 3.0 and 4.0 of the Standard Technical Specifications on the Applicability of Limiting Conditions for Operation and Surveillance Requirements," was issued to address Technical Specification improvements. One ir Je addressed by the generic letter involved the unnecessary restrictions on mode changes by Specification 3.0.4. The NRC acknowledges, in GL 89 07, that Specification 3.0.4 unduly restricts operation when conformance to the action statement provides an acceptable level of safety for continued operation. The generic letter states the following:

For an LCO that has Action Requirements permitting continued operation for an unlimited period of time, entry into an operational mode or other specified condition of operation should be permitted in accordance with the requirements for an LCO. The restriction on a change in operational modes or other specified conditions should apply only where the Action Requirements establish a specified time interval in which the LCO must be met or a shutdown of the facility would be required.

Therefore, making Specification 3.0.4 not applicable in Action Statement 3.7.4.1.a would be consistent with the stated NRC position.

Chanagg Technical SoecificatioJL GEDelal North Anna Units All Technical Specification changes described herein apply to 1 and 2.

Technical soecJfication 3.7.41 Action Statement The proposed change would permit bl mode changes while in ce service water 3.7.4.1.a by stating that Specification ld3.0.4 is not applica e on flows to the component cooling heat exchangers h nger service are thrott e .

r required normal Action Statement 3.7.4.1.a requiresf component cooling hea water flows to be throttled, within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />,if one of the oues tha serv:ce water pumps becomes inoperable. basis Thistoaction flows be ensurbas service water pumps remain capable of providing i

f the third design recirculation spray heat exchangers t ents within this and allow operable normal service water pump. statement for an in Technical Specification address multiple f ailures. t perform The ptoposed change would also allow operational ciated normal i ments of Action or flex periodic maintenance on a service water pump t icting mode or its asso emergency power supply. During this period changes.

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