ML20147H493

Requests Addl Info to Complete Review of Util 860819 Request for Permanent Exemption from Requirements of 10CFR50.62(c), ATWS Rule,Including How Plant to Be Maintained for Remaining Lifetime within Conditions Assumed for ATWS Analyses

ML20147H493
Person / Time
Site:	Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date:	03/03/1988
From:	Wang A Office of Nuclear Reactor Regulation
To:	Mroczka E CONNECTICUT YANKEE ATOMIC POWER CO.
References
TAC-62290, NUDOCS 8803080503
Download: ML20147H493 (3)

Text

March 3,1988 0

Docket No. 50-213 DISTRIBUTION

.Destetfije, A. Wang NRC 4 Local PDRs OGC-WF intenMPP E. Jordan S. Varga J. Partlow Mr. Edward J. Mroczka B. Boger ACRS(10)

Senior Vice President S. Norris Gray File Connecticut Yankee Atomic Power Company P. O. Box 270 Hartford, Connecticut C6141-0270

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION REGARDING EXEMPTION FROM 10 CFR 50.62 (ATWS RULE) FOR THE HADDAM NECK PLANT (TAC NO. 62290)

In your letter dated August 19, 19P6, the Connecticut Yankee Atomic Power Company (CYAPCO) requested a pemanent exemption from the requirements of 10 CFR 50.62(c), the ATWS Rule. In that submittal CYAPC0 stated several actions, including increased pressure relief capability, refueling with fuel with a more negative moderator temperature coefficient, and providing assurance that the auxiliary feedwater initiation circuit is diverse and independent of the reactor protection system, were taken to substantially mitigate the consequences of limiting postulated ATWS events at the Haddam Neck plant.

To complete our review the NRC needs to know hcu CYAPC0 will maintain the plant for its remaining lifetime within the conditions assumed for the ATWS analyses. In particular, CYAPC0 should describe how they will centrol fuel reloads to maintain the assumed range of moderator temperature coefficient, control the average coolant temperature and traintain the FORVs and diverse circuit for auxiliary feedwater pump actuation. Additionally, the NRC eeeds a conrnitment from CYAPC0 to maintain the n-oderator ten.perature coefficient at full power with equilibrium Xenon, at no less than -7. x 10~5 delta k/k/*F for every fuel cycle.

The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respendents; therefore, CMB clearance is not required under P.L.96-511.

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Mr. Edward J. Mroczka -?-

With the additional information requested and the comitment to limit the moderator. temperature coefficient, the NRC will'be.able to resolve the ATWS exemption for the Haddam Neck Plant. If you have any questions or comments, please call me at (301) 492-1313.

Sincerely, original signed by Alan B. Wang, Project Manager Pro,iect Directorate I-4 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation cc: See next page F

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Mr. Edward J. Mroczka Connecticut Yankee Atomic Power Company Haddam Neck Plant ec*

Gerald Garfield, Esquire R. M. Kacich, Manager Day, Berry and Howard Ccurselors at Law Generation Facilities Licensirg City Place Northeast Utilities Service Company Hartford, Connecticut 06103-3499 Post Office Box 270 Hartford, Connecticut 06141-C270 W. D, Rorrberg, Vice President D. O. Nordquist, Director Nuclear Operations Quality Services Department Northeast Utilities Service Company Northeast Utilities Services Company Post Office Box 270 Post Office Box 270 Hartford, Connecticut 06141-0270 Hartford, Connecticut 06141-0270 o

Kevin McCarthy, Director Regional Administrator -

Radiation Control unit Region I Departnent of Environtrental Protection U. S. Nuclear Regulatory Comission State Office Buildins 631 Park Avenue Hartford, Connecticut 06106 King of Prussia, Pennsylvania 194Cf l Bradford S. Chase, Under Secretary Board of Selectmen Energy Divisien Town Hall Office of Policy anc Management Haddam, Connecticut 06103 80 Washington Street Hartford, Connecticut 06106 J. T. Shedlosky, Resident Inspector i Haddam Neck Plant '

D. B. Miller, Station Superintendent c/o U. S. Nuclear Regulatory Cornissier !

Haddam Neck Plant Post Office Box 116 RFD f 1 East Haddam Post Office  !

Post Office Box 127E East Haddam, Connecticut 06423

' East Hampton, Connecticut 06424 i i

G. H. Bouchard, Unit Superintendent Haddam Neck Plant RFD f 1 Post Office Box 127E East Harpton, Connecticut 06424 l

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