ML20132H241

Notifies That Use of Bleed & Feed Unacceptable as Method for Mitigating Consequences of DBAs & Not Permanent Alternative to Qualification of Electrical Equipment. Justification for Continued Operation Required

ML20132H241
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	09/30/1985
From:	Thompson H Office of Nuclear Reactor Regulation
To:	Opeka J CONNECTICUT YANKEE ATOMIC POWER CO.
References
LSO5-85-09-023, LSO5-85-9-23, NUDOCS 8510020101
Download: ML20132H241 (3)

Text

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UNITED STATES

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/ September 30, 1985 Docket No. 50-213 LS05-85-09-023 Mr. John F. Opeka, Senior Vice President Nuclear Engineering and Operations Connecticut Yankee Atomic Power Company Post Office Box 270 Hartford, Connecticut 06141

SUBJECT:

ENVIRONMENTAL QUALIFICATION OF EQUIPMENT OUTSIDE CONTAINMENT Re: Haddam Neck Plant Connecticut Yankee Atomic PDwer Company (CYAPCo) was required to have the Haddam Neck Plant in conformance with the EQ rule by the end of the second outage after March 31, 1982. Your position is that in starting up after the August 1984 outage you were in conformance with the EQ rule for equipment located outside the containment. This position was based upon the use of the

" feed and bleed" core cooling method following a high energy line break outside of containment in lieu of qualifying equipment important to safety located outside containment.

In our effort to issue the final safety evaluation report on environmental qualification for Haddam Neck, we have considered your proposed use of " feed and bleed" core cooling in response to high energy line breaks outside containment in lieu of qualification of a large amount of equipment outside containment. The staff has concluded that the use of " feed and bleed" as a permanent alternative to qualification of electrical equipment important to safety is not acceptable.

Our current understanding of the licensing bases for Haddam Neck does not include the use of " feed and bleed" as a method of mitigating the consequences of design basis accidents. Therefore, consistent with the requirements of 10 CFR 50.49, it is the staff's position that the systems identified by the licensee as necessary to mitigate the consequences of design basis accidents, including high energy line breaks outside containment, should be qualified to the enviror.ments in which the systems would be required to function.

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Mr. John. F. Opeka September 30, 1985 We emphasize that the use of " feed and bleed" has never been approved by the NRC as the primary means of mitigating any design basis accidents. To this end, substantial additional analysis would be needed.to support the CYAPCo position and, in all likelihood, a Commission policy decision made concerning the overall approach.

In light of the information presented above, the staff now requires that a justification for continued operation be submitted immediately. Note that the staff has accepted, for other facilities, the limited use of " feed and bleed" in support of such a justification.

Sincerely, Original signed by:

Hugh L. Thompson, Jr., Director Division of Licensing Office of Nuclear Reactor Regulation DISTRIBUTION Docket NRC PDR Local PDR

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o Mr. John F. Opeka Connecticut Yankee Atomic Power Company Haddam Neck Plant cc:

Gerald Garfield, Esquire Kevin McCarthy, Director Day, Berry & Howard Radiation Control Unit Counselors at Law Department of Environmental City Place Protection Hartford, Connecticut 06103-3499 State Office Building Hartford, Connecticut 06106 Superintendent Haddam Neck Plant RDF #1 Post Office Box 127E East Hampton, Connecticut 06424 Edward J. Mroczka Vice President, Nuclear Operations Northeast Utilities Service Company Post Office Box 270 Hartford, Connecticut 06141-0270 Board of Selectmen Town Hall Haddam, Connecticut 06103 State of Connecticut Office of Policy and Management ATTN: Under Secretary Energy Division 80 Washington Street Hartford, Connecticut 06106 Resident Inspector Haddam Neck Nuclear Power Station c/o U.S. NRC East Haddam Post Office East Haddam, Connecticut 06423 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 W _ _ _ _ . _ _ _ _