ML20052F164

Requests Info Re SEP Topic VI-7.A.4, Core Spray Nozzle Effectiveness, within 45 Days of Ltr Receipt

ML20052F164
Person / Time
Site:	Millstone
Issue date:	04/23/1982
From:	Crutchfield D Office of Nuclear Reactor Regulation
To:	Counsil W NORTHEAST NUCLEAR ENERGY CO.
References
TASK-06-07.A4, TASK-6-7.A4, TASK-RR LSO5-82-04-068, LSO5-82-4-68, NUDOCS 8205120186
Download: ML20052F164 (3)

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April 23,1982 DISTRIBUTION Docket Docket No. 50-245 Lo al DR L505-82-04-068 ORB Reading #

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NECEfYED -

DCrutchff HSmith Og' 74N

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Mr. W. G. Counsil, Vice President JSh J

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Northeast Nuclear Energy Company OI&E 6

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Hartford, Connecticut 06101 SEPB 9)

SUBJECT:

SEP TOPIC VI-7.A.4 - CORE SPRAY N0ZZLE EFFECTIVENESS - HILLSTONE 1 By letter dated March 11,1982 we provided our evaluation of SEP Topic VI-7.A.4 for the Hillstone 1 facility. Our evaluation stated that we had relied upon a General Electric Company analysis that had not been submitted for our review. The analysis still has not been provided for our use.

Please provide the information requested in Enclosure 1 within 45 days of your receipt of this letter so that we can confirm our eariter position that core spray distribution is not a safety concern at Millstone 1.

This request involves fewer than ten respondents. Therefore, OMB clearance is not required under P.L.96-511.

Sincerely.

Original signed by Dennis M. Crutchfield, Chief Operating Reactors Branch #5 Division of Licensing S E* I

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Mr. W. G. Counsil April 23,1982 CC William H. Cuddy, Esquire State of Connecticut Day, Berry & Howard Office of Policy & Management Counselors at Law ATTN:

Under Secretary Energy One Constitution Plaza Division Hartford, Connecticut 06103 80 Washington Street Hartford, Connecticut 06115 Ronald'C. Haynes, Regional Administrator Nuclear Regulatory Commission Region I Office 631 Park Avenue King of Prussia, Pennsylvania 19406 Northeast Nuclear Energy' Company ATTN:

Superintendent Millstone Plant P. O. Box 128 Waterford, Connecticut 06385 Mr. Richard T. Laudenat Manager, Generation Facilities Licensing Northeast Utilities Service Company P. O. Box 270 Hartford, Connecticut 06101 Resident Inspector

-c/o U.'S. NRC P. O. Box Drawer KK Niantic, Can'necticut 06357 First-Selectman of the Town of Waterford Hall of Records 200 Boston Post Road Waterford, Connecticut 06385 John F. Opeka Systems Superintendent Northeast Utilities Service Company P. O. Box 270 Hartford, Connecticut 06101 U. S. Environmental Protection Agency Region I Office ATTN:

Regional Radiation Representative JFX Federal Building

-Boston, Massachusetts 02203 O

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ENCLOSURE MILLSTONE 1 INFORMATION REQUEST FOR CORE SPRAY DISTRIBL' TION Information derived from the Japanese core spray tests sugigsted that -

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the central fuel bundles of a BWRj3 core ifaf receive icw' core spray

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fjow, Dresden-2 and Millstone-1 are two.BWR/3 plants which are being reviewed as part of the Systematic Evaluatior. Program (SEP.).

To rpspond to the concerns of SEP generic iss.ue A-16, steam effect on EWR core spray distribution,the implication cf the core spray test informs. tion.from Japan on the core spray distribution adequacy for Dresden-2 and Mill-stone-1 should be addressed.

In a telephone conference with GE,' the staff was told that the analyses can be done to demonstrate that for a limiting BWR/3 case (Dresden-2 z.nd Mill' stone-l are both BWR/3 cores), the ct.lculated peak claddir.g temperature will not exceed the 10 CFR 50.46 limit of 2200*F even when no credit is taken in the analyses for core spray cool'rg.

The applicants are requested to provide the results of the analyses including a description of the assumptions used in the an,r. lyses. These sh'ould be orwarded to NRC within 45 days. after receipt o'f this request..

If the staff's evaluation of the applicants' analyses reveals results which confirm the staff',s understanding gained in the telephone con-forence, we will be able to conc'ude that the staff's: concern regarding generic issue A-16 for Dresden-2 and Millstone-1 has been satisfactorily

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