ML20210A596

Forwards Safety Evaluation Supporting Temporary Waiver of Compliance from Tech Specs 1.8 & 3.11 Re Opening of Manual Containment Isolation Valves SI-V-863A - D & SA-V-413.Safety Benefits Outweigh Monthly Surveillance Risks

ML20210A596
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	09/11/1986
From:	Charemagne Grimes Office of Nuclear Reactor Regulation
To:	Opeka J CONNECTICUT YANKEE ATOMIC POWER CO.
Shared Package
ML20210A602	List: ML20210A596 ML20210A645
References
NUDOCS 8609170284
Download: ML20210A596 (3)

Text

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.r UNITED STATES sf o NUCLEAR REGULATORY COMMISSION

[ WASHWOTON, D. C. 20666 I

..... September 11, 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:

TEMPORARY WAIVER OF COMPLIANCE FROM TECHNICAL SPECIFICATION SECTIONS 1.8 AND 3.11 By letter dated August 29, 1986, Connecticut Yank'ee Atomic Power Company (CYAPCO) requested a license amendment to permit the opening of normally closed manual containment isolation valves (SI-V-863 A, B, C, and D, and SA-V-413) in order to perform routine maintenance activities and required surveillances. Valves SI-V-863 A, 8, C, and D are in the high pressure safety injection system. Periodic surveillance of these valves has been detennined to be important from a safety standpoint because they can be used to ensure that safety injection check valves (SI-CV-862. A, B, C, and D) are passing flow, there is proper boron concentration in the recirculation line, and any precipitated boron in the system is either flushed or redissolved into solution.

Similarly, the licensee has determined that periodic operation of valve SA-V-413 would enhance operability of the containment continuous leak monitoring system and, as necessary, maintain the containment pressure within technical specification limits, by injecting outside air to maintain a slightly positive pressure.

The staff has reviewed the information contained in the August 29, 1986 letter requesting the license amendment be issued using the guidance identified in 10 CFR 50.91(a)(5) for exigent circumstances. Based upon our review, we conclude that, while a safety benefit and a potential reduction in the core melt probability would likely occur from the testing

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of the subject valves, CYAPC0 has failed to provide adequate justification for an exigent change to the technical specifications.

Howevar, the staff concludes that the safety benefits of reducing the 3

potent ~ial core melt frequency and ensuring the operability of the HPSI system far outweighs the risks associated with the proposed monthly surveillance of the subject manual isolation valves. Therefore, the i

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September ll,1986 badJM John F. Opeka staff temporarily waives the compliance to Technical Specifications 1.8 and 3.11 to permit surveillance of valves SI-V-863 A, B, C, and D until the proposed license amendment can be formalized through the normal review process. Similarly, the staff temporarily waives compliance from Technical Specification 1.8 and 3.11 for valve SA-V-413 only as needed to ensure the operation of the containment continuous air leakage monitoring system until the proposed license amendment can be formalized through the nomal review process. A copy of our Safety Evaluation is enclosed.

Sincerely, Original signed by Christopher I. Grimes Christopher I. Grimes, Director Integrated Safety Assessment Project Directorate Division of PWR Licensing - B

Enclosure:

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6-Mr. John F. Opeka Connecticut Yankee Atomic Power Company Haddam Neck Plant i

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 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 ,

l 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 k

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