ML20203M524

Forwards Safety Evaluation & Exemption from Single Failure Requirements of GDC 35.Two Valves in HPSI Suction Lines, Located Outside Containment,Exempt from Single Failure Consideration in Event of Small Break LOCA in Cycle 14

ML20203M524
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	04/28/1986
From:	Miraglia F Office of Nuclear Reactor Regulation
To:	Opeka J CONNECTICUT YANKEE ATOMIC POWER CO.
Shared Package
ML20203M526	List: ML20203M524 ML20203M532 ML20203M538
References
NUDOCS 8605010558
Download: ML20203M524 (3)

Text

April 28, 1986 Docket No.: 50-213 Mr. John F. Opeka, Senior Vice President Nuclear Engineering and Operations Connecticut Yankee Atomic Power Company Post Office Box 270 Hartford, Connect cut 06141-0270 Dear Mr. Opeka

SUBJECT:

EXEM.(ION FROM SINGLE FAILURE CRITERION (GDC 35) -

, HADDAM NECK PLANT The Commission has issued the enclosed exemption from the single failure ,

requirements of General Design Criteria No. 35 of 10 CFR 50, Appendix A, l and the Interim Acceptance Criteria in response to your letter dated l April 22, 1986. This exemption, which is being forwarded to the Office of the Federal Register for publication, pertains to the requirement that the single failure criterion be assumed in all emergency core cooling system evaluations. In particular, it exempts two valves, in the suction line for the high pressure safety injection system, located outside the containment, from single failure considerations in the event a small break  ;

break loss-of-coolant accident should occur during the period of cycle 14 operation.

Sincerely, Original signed by: Frank Miraglia Frank J. Miraglia, Director Division of PWR-Licensing - B

Enclosure:

DISTRIBUTION j As stated Docket file

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\***++/ April 28,1986 Docket No.: 50-213 Mr. John F. Opeka, Senior Vice President Nuclear Engineering and Operations Connecticut Yankee Atomic Power Company Post Office Box 270 Hartford, Connecticut 06141-0270

SUBJECT:

EXEMPTION FROM SINGLE FAILURE CRITERION (GDC 35) -

HADDAM NECK PLANT The Commission has issued the enclosed exemption from the single failure requirements of General Design Criteria No. 35 of 10 CFR 50, Appendix A, and the Interim Acceptance Criteria in response to your letter dated April 22, 1986. This exemption, which is being forwarded to the Office of the Federal Register for publication, pertains to the requirement that the single failure criterion be assumed in all emergency core cooling system evaluations. In particular, it exempts two valves, in the suction line for the high pressure safety injection system, located outside the containment, from single failure considerations in the event a small break break loss-of-coolant accident should occur during the period of cycle 14 t operation.

Sincerely, i l

1 dc )f

• Frank MNiragl1f, Director Division of PWR-Licensing - B

Enclosure:

As stated cc: See next page I L

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 Richard M. Kacich, Supervisor RDF #1 Operating Nuclear Plant Licensing Post Office Box 127E Northeast Utilities Service Company East Hampton, Connecticut 06424 Post Office Box 270 Hartford, Connecticut 06141-0270 l Edward J. Mroczka Vice President, Nuclear Operations l

Northeast Utilities Service Company Post Office Box 270 Hartford, Connecticut 06141-0270 Board of Selectmen l Town Hall j Haddam, Connecticut 06103 l State of Connecticut 1

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 l East Haddam Post Office l East Haddam, Connecticut 06423 l

l Regional Administrator, Region I

! U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406

.