ML19347D485

Discusses Review of Util Providing Info Re 48-h Auxiliary Feedwater Pump Endurance Test & Compliance W/Nrc Requirement to Automate Start of steam-driven Pump.Item Re Pump Test Resolved

ML19347D485
Person / Time
Site:	Millstone
Issue date:	03/19/1981
From:	Clark R Office of Nuclear Reactor Regulation
To:	Counsil W NORTHEAST NUCLEAR ENERGY CO.
References
TAC-43559, TAC-46844, NUDOCS 8103260119
Download: ML19347D485 (3)

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March 19, 1981 Docket No. 50-336 Mr. W. G. Counsil, Vice President Nuclear Engineering & Operations Northeast Nuclear Energy Company P. O. Box 270 Hartford, Connecticut 06101

Dear Mr. Counsil:

By letter dated February 19, 1981, you provided information to document (1) the results of a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> endurance test of the A auxiliary feedwater (AFW) pump and (2) your intentions regarding compliance with our requirement to automate the start of the steam-driven AP4 pump. Your letter was in response to the requirements as set forth in our letter of January 14, 1981 and earlier correspondence dated October 22, 1979.

Each of these items will be addressed separately.

Item (1)

Based on our review of the submitted data, we conclude that an appropriate operating test of the APd pump A was completed on February 6,1981. This item, additional short-term recommendation No. 2 of our October 22, 1979 letter, is therefore, satisfactorily, resolved.

Item (2)

Long-Term Recommendations GL-3 from NUREG-0635 and our October 22, 1979 letter stated:

"At least one APd system punp and its associated flow path and essential instrumentation should automatically initiate APdS flow and be capable of being independent of any alternating current pcwer source for at least two hours. Conversion of direct power to alternating current is acceptable."

After extensive review of the justification for this requirement and the infornation you have supplied including the new data presented in your February 19, 1981 letter, we have concluded that only a small increase in postulated plant safety would result from automating the initiation of the steam-driven AFW pump at Millstone, Unit No. 2.

Therefore, we find that a relaxation of Long-Term' Recommendation GL-3 for this facility is appropriate at this time. This relaxation isgd -

based on the following considerations.

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The availability of two 100 percent of rated capacity, fu W 4

e independent electric-driven APd pumps that satisfy the spleh $

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- e The steam turbine-driven AFW pump will be modified to be completely independent of all AC power requirements by January 1,1982.

e Upon loss of off-site power with a resultant reactor trip and loss of both main feedwater and AFW flow, the steam generator " dry-out time" (time to loss of decay heat removal capability) is greater than 45 minutes.

The current emergency operating procedure; utilized during a station e

blackout explicitly direct the operator to manually initiate and confirm AFW flow to each steam generator from the steam turbine-driven pump.

This letter completes our review of the short-term, additional short-term and long-term recommendations presented in our October 2,1979 letter.

The detailed review of the safety grade instrumentation system required to automatically initiate the auxiliary feedwater system will be issued at a later time.

Since-'ly, A /"';

%bN obert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing -

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Northeast Nuclear Energy Company cc:

William H. Cuddy, Esquire Mr. Jchn Shediosky Day, Berry & Howard Resident Inspector / Millstone Counselors at Law c/o U.S.N.R.C.

One Constitution Plaza P. O. Drawer KK Hartford, Connecticut 06103 Niantic, CT 06357 Anthony Z. Roisman Mr. Charles Brinkman Natural Resources Defense Council Manager - Washington Nuclear 91715th Street, N.W.

Operations Washington, D. C.

20005 C-E Power Systens Combustion Engineering, Inc.

Mr. Lawrence Bettencourt, First Selectman 4853 Cordell Aven., Suite A-1 Town of Waterford Bethesda, MD 20014 Hall of Records - 200 Boston Post Road Waterford, Connecticut 06385 Northeast Nuclear Energy Corpany ATTN: Superintendent Millstone Plant Connecticut Energy Agency Post Office Box 128 ATTN: Assistant Director, Research Waterford, Connecticut 06385 and Policy Development Department of Planning and Energy Waterford Public Library Policy Rope Ferry Road, Route 156 20 Grand Street Waterford, Connecticut 06385 Hartford, CT 06106 Director, Criteria and Standards Division Office of Radiation Progracs (ANR-460)

U.S. Environmental Protection Agency Washington, D. C.

20460 U. S. Environmental Protection Agnecy Region I Office ATTN: EIS COORDINATOR John F. Kennedy Federal Building Boston, Massachusetts 02203 Northeast Utilities Service Corpany ATTN: Mr. James R. Hf amelwright Nuclear Engineering and Operations P. O. Box 270 Hartford, Connecticut 06101

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