ML20083D699

Application for Amend to Licenses NPF-4 & NPF-7,revising Tech Specs to Require That Turbine Overspeed Protection Sys Be Demonstrated Operable at Least Once Per 31 Days

ML20083D699
Person / Time
Site:	North Anna
Issue date:	12/21/1983
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Harold Denton, John Miller Office of Nuclear Reactor Regulation
Shared Package
ML20083D700	List: ML20083D699 ML20083D712
References
720, NUDOCS 8312280217
Download: ML20083D699 (3)

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VINGINIA ELECTHIC AND l'OWHM COMPANY l Ricnwoxu,VINGINIA 202G1 l

l W.L.SraWAST Vics Pmmernswr December 21, 1983 Noctuam oramations Mr. Harold R. Denton, Director Serial No. 720 Office of Nuclear Reactor Regulation N0/JHL: Jab Attn: Mr. James R. Miller, Chief Docket Nos. 50-338 Operating Reactors Branch No. 3 50-339 Division of Licensing License Nos. NPF-4 U. S. Nuclear Regulatory Commission NPF-7 Washington, D. C. 20555 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNIT NOS. 1 AND 2 PROPOSED TECHNICAL SPECIFICATION CHANGE Pursuant to 10CFR50.90, the Virginia Electric and Power Company requests an amenduent, in the form of a change to the Technical Specifications, to ,

Operating License Nos. NPF-4 and NPF-7 for North Anna Unit Nos. 1 and 2.

The proposed Technical Specification change will revise surveillance requirement 4.7.1.2a for North Anna Unit Nos. I and 2. The proposed change will require the turbine overspeed protection system to be demonstrated

< operable at least once per 31 days instead of once per 7 days. The turbine valves have been demonstrated reliable for each unit in the past. The cycling of the turbine valve produces secondary instability, challenges the secondary control systems, increases the risk of turbine and reactor trips, reduces capacity factors and requires replacement generation. In addition, the Westinghouse generic recommendation for testing the turbine valves is to test on a monthly interval. The proposed Technical Specification change for North Anna Unit No. 1 is provided in Attachment 1. The proposed Technical Specification change for North Anna Unit No. 2 is provided in Attachment 2. A discussion of the proposed Technical Specification change is provided in Attachment 3.

This request has been reviewed and approved by the Station Nuclear Safety and Operating Committee and the Safety Evaluation and Control Staff. It has been determined that this request does not involve an unreviewed safety question as defined in 10CFR50.59.

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Harold R. Denton Vamo wtA Er.ECTRIC AND Powra COMPANY TO This proposed change does pose a significant hazards consideration as specified in example (iii) of the Federal Register dated April 6, 1983 of examples of amendments that are considered likely to involve a significant hazards consideration. There is a significant relaxation in the limiting condition for operation by moving the surveillance requirement from at least once per 7 days to at least once per 31 days but this relaxation will belp reduce; secondary instability, challenges to secondary control systems, the risk of turbine and reactor trips and the cost of replacement generation to perform the test. The turbine valves have proven very reliable in the past and they should continue to do so with the proposed change. Vepco proposes that this change would not be considered a significant hazards consideration because of the above reasons and because it is Westinghouse's generic recommendation for testing the turbine valves on a monthly interval.

We have evaluated this request in accordance with the criteria in 10CFR170.22.

Since this request involves a safety issue which the Staff should be c.ble to determine does not involve a significant hazards consideration for Unit I and a duplicate safety issue for Unit 2, a Class III license amendment fee and a Class I license amendment fee are required for Unit 1 and Unit 2, respectively. A voucher check in the amount of $4,400 is enclosed in payment of the required fees.

Very truly y,ours

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kb(a if W. L. Stewart Attachments

1. Proposed Technical Specification Change - Unit 1

2. Proposed Technical Specification Change - Unit 2

3. Discussion of Proposed Technical Specification Change j

4. Voucher Check for $4,400.

cc: Mr. James P. O'Reilly Regional Administrator Region II Mr. M. W. Branch NRC Resident Inspector l

North Anna Power Station Mr. Charleri Price Department of Health Governor ,treet Richmon Virginia 23219 Mr. K. D. Grada Duquesne Power and Light Company Mr. L. D. Carber LIS

t COMMONWEALTH OF VIRGINIA )

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CITY OF RICHMOND )

l The foregoing document was acknowledged before me, in and for the City and Commonwealth aforesaid, today by W. R. Cartwright who is Manager-Nuclear Operations Support, of the Virginia Electric and Power Company. He is 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 ai M day of / 8.+ # , 19 ( A .

My Commission expires: 4 .2. /, , 19 V.

b d . PL 'A Notary Public I

(SEAL) s/ col

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