ML20128D490

Forwards SE Accepting 120-day Response to Suppl to Generic Ltr 87-02, Verification of Seismic Adequacy of Mechanical & Electrical Equipment in Operating Reactors,Usi A-46,

ML20128D490
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	11/25/1992
From:	Wang A Office of Nuclear Reactor Regulation
To:	Opeka J CONNECTICUT YANKEE ATOMIC POWER CO., NORTHEAST NUCLEAR ENERGY CO.
Shared Package
ML20128D492	List: ML20128D490 ML20128D523
References
REF-GTECI-A-46, REF-GTECI-SC, TASK-A-46, TASK-OR GL-87-02, GL-87-2, TAC-M69450, NUDOCS 9212070291
Download: ML20128D490 (4)

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/ November 25, 1992 Docket No. 50-213 Mr. John F. Opeka Executive Vice President, Nuclear Connecticut Yankee Atcmic Power Company Northeast Nuclear Energy Company Post Office Box 270 Hartford, Connecticut 06141-0270

SUBJECT:

SAFETY EVALUATION OF THE HAODAM NECK PLANT, 120-DAY RESPONSE TO SUPPLEMENT NO 1 TO GENERIC LETTER 87-02 (TAC M69450)

By a letter dated September 21, 1992, Connecticut Yankee Atomic Power Company (CYAPCO) submitted its response to Supplement No I to Generic letter (GL) 87-02 for the Haddam Nack Plant. Supplement No. I to GL 87-02 required that all addressees provide, within 120 days of the issue date of the supplement, either a commitment to use both the Seismic Qualification !tility Group (SQUG) commitments and the implementation guidance described in the Generic Implementation Procedure, Revision 2 (GIP-2), as corrected on February 14, 1992, and as rupplemented by the staff's Supplemental Safety Evaluation Report No. 2 (SSER No. 2) on GIP-2., or else provide an alternative method for responding to GL 87-02. The supplement also required that those addressees committing to implement GIP-2 provide an impler.entation schedule, and provide the detailed information as to what procedures and criteria were used to generate the in-structure respor.:e spectra to be used for USI A-46. In addition, the staff requetted in SSER No. 2 that the licensees inform the staff in the 120-day response if they intend to change their licensing basis to reflect a commitment to the USI A-46 (GIP-2) methodology for verifying the seismic adequacy of mechanical and electrical equipment, prior to receipt of the staff's plant-specific safety evaluation resolving USI A-46. Enclosure 1 provides the staff's evaluation of CYAPCO's response to Supplement No. I to GL 87-02, dated September 21, 1992.

The staff finds that CYAPC0's commitment to implement GIP-2, including the clarifications, interpretations and exceptions identified in SSER No. 2, as an acceptable method for resolving USI A-46 at the Haddam Neck Plant. The staff finds that it is acceptable for CYAPC0 to use previously performed anchorage evaluations for USI A-46, provided that the evaluations meet the criteria and procedures approved in SSER No. 2 (Section 11.4.4). The staff also finds that it is acceptable to un existing seismic qualification test reports to demonstrate operability for SSEL equipment which was qualified to IEEE 30 1975. The methods defined in EPRI Report NP-6041-SL are, in general, not acceptable to the staff for resolving equipment cutliers. However, the staff will consider the application of some of the criteria provided in EPRI Report NP-6041-SL, for the resolution of equipment outliers, on a case-by-case basis The proposed implementation schedule for the Haddam Neck Plant is within the 2-year respcnse period requested by the staff and is acceptable. .

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Mr. John F. Opeka The staff has reviewed CYAPCO's re.sponse concerning in-structure response spectra, and has concluded that it is acceptable, with one possible exception where CYAPC0 refers to SSER No. 2, Section ll.A.2.4. If CYAPC0 intends to use IPEEE spectra fo* USl A-46, it should submit for staff review as soon as oossible, the infor . tion requested in SSER No. 2, Section 11.4.2.4 CYAPC0 indicated that, as rart ,f the resol vion of GL 87-02, it intends to change its licensing basis, via 10 CrR 50.59, to include the GIP methodologies as an option for demonstrating the seismic adequacy of new and replacement plant equipment. The staff recognizes that CYnPC0 may revise its licensing basis in accordance with 10 CFR 50.59 to reflect the acceptability of the USI A-46 (GIP) methodology for verifying the ismic adequacy of electrical and mechanical equipment covered by the GIP. ..owever, since CYAPC0 intends to augment it s licensing basis to include the GIP methodology as an option for verifyit 9 seismic adequacy, rather than revise its licensing basis such that the GIP-2 would be the sole methodology, the staff cautions that it is not acceptable to combine any part of GlP-2 with the current licensing basis methodologies such that it results in a less conservative approach than if GIP-2 or the current licensing basis methodologies were applied separately, if pu have any questions concerning this review, please contact me.

Sincerely, Original signed by Alan Wi . g, Projec'. Manager Project Directorate 1-4 Divisien of Reacto' Projects - I/II --

Office of Nuclear '8eactor Regulation

Enclosure:

Safety Evaluation cc w/ enclosure:

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Gerald Garfield, Esquire R. H. Kacich, Director Day, Cerry and Howard Wuclear Licensing Counselors at Law Northeast Utilities Service Company City Place Post Office Box 270 Hartford, Connecticut 06103-3499 Hartford, Connecticut 06141-0270 W. D. Romberg, Vice President D. O. Nordquist Nuclear, Operations Services Director of Quality Services Northeast Utilities Service Company Northeast Utilities Service Company Post Office Box 270 Post Office Box 270 Hartford, Connecticut 06141-0270 Hartford, Connecticut 06141-0270 Kevin McCarthy, Director Regional Administrator Radiation Control Unit Region ! ,

Department of Environmental Protection U.S. Nuclear Regulatory Commission State Office Building 475 Allendale Road Hartford, Connecticut 06106 King of Prussia, Pennsylvania 19406 Allan Johanson, Assistant Director Board of Selectmen Office of Policy and Management Town Office Building Policy Development and Planning Division Haddam,-Connecticut 06438 80 Washington Street Hartford, Connecticut 06106 Resident Inspector Haddam Neck Plant J. P. Stetz, Nuclear Station Director c/o U.S. -Huclear Regulatory Commission Haddam Neck Plant 361 Injun Hollow Road Connecticut Yankee Atomic Power Company East Hampton, Connecticut 06424-3099 302 Injun Hollow Road East Hampton, Connecticut 06424-3099 Nicholas S. Heynolds Winston & Strawn G. H. Bouchard, Nuclear Unit Director 1400 L Street, NW Haddam Neck Plant Washington, DC 20005-3502 Connecticut Yankee Atomic Power Company 362 Injun Hollow Road East Hampton, Connecticut 06424-3099 W

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