ML20149H548

Opposes Util Decision to Suspend Type C Testing of Reactor Bldg Closed Cooling Water Sys Containment Isolation Valves Ref in .Such Sys Should Be Fabricated to at Least Safety Class 2 Requirements Inside Containment

ML20149H548
Person / Time
Site:	Millstone
Issue date:	02/10/1988
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Mroczka E NORTHEAST NUCLEAR ENERGY CO.
References
TAC-66385, NUDOCS 8802190324
Download: ML20149H548 (2)

Text

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1 i FEB 101988 Docket No. 50-336

. Mr. Edward J. Mroczka ,

Senior Vice President Nuclear Engineering and Operations Northeast Nuclear Energy Company ,

P. O. Box 270 Hartford, Cr.nnecticut C6141-0270 J

Dear Mr. Mroczka:

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SUBJECT:

MILLSTONE UNIT 2 REACTOR BUILDING CLOSED COOLING WATER (RBCCW) l SYSTEM CONTAINMENT ISOLATION VALVES (TAC NO. 66385)  ;

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, Your letter dated July 14, 1987 inforned us that you intended to no longer  ;

test certain containment isolation valves, associated with the RBCCh' System,

. Under the Type C test program of 10 CFR Part 50, Appendix J. By letter dated '

November 3,1987, we requested additional infonnation concerning the RBCCW f system inside containrent and the associated Containment Air Recirculation -

(CAR) units. Your response to our November 3, 1987 letter, dated [

j January 7,1988, indicated that the RBCCW/ CAR is predominantly fabricated to l Safety Class 3 requirements inside containment. It is our position that such systems should be fabricated to at least Safety Class 2 requirements in order  ;

to not require post-accident leak-tightness of the associated containment i isolation valves.  ;

Accordingly, we do not concur with your decision to suspend Type C testing of the containment isolation valves referenced in ycur letter dated July 14, 1987, i Sincerely, 3

ac.+ m I sw r n  ;

JCC: /. CrMa John F. Stolr Director k Project Directorate I-4  !

Division of Reactor Projects I/II  !

Office of Nuclear Reactor Regulation  ;

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h Mr. Edward J. Mroczka Mi11stene Nuclear Fower Station Northeast Nuclear Energy Company Unit No. 2 CC:

Cerald Garfield, Esquire R. M. Kacich, Manager Cay, Derry and Heward Cer.eration Facilities Licensing Ccurselors at Law Northeast Utilities Service Compary City Placc Fost Office Box ?70 Hertford, Connecticut 06103-3499 Hartford, Cernecticut 06141-C270 W. D. Rorberg, Vice President D. C. Ncrdquist, Director Nuclear Operations Cuality Services Departrent Northeast lJtilitiet Service Ccmpany Northeast Utilities Services Cerpary Fest Office Eox ?70 Post Office Ccx 270 Martferd, Connecticut 06141-0270 Hartford, Connecticut 06141-0270 Kevin l'cCarthy, Cirector Regional Actinistrator

~ Radiaticn Control Unit Regier I -

- Cepartrent of Envircrrental Frctection U. S. Nuclear Regulatery Corrission State Office Buildir.g 631 Park Avenue Hartford, Connecticut 06106 King of Prussia, Per.rsylvania 19406 LD 4

Bradferd S. Chase, Under Secretary First Selectmen

@. - Energy Divisicn Tcwn cf Waterford Office cf Felicy and Managerert Hall of Records l 20 Washington Street 200 Besten Fest Road I;artforc, Connecticut 0610E Waterford, Cconecticut 063PE S. E. Scace, Staticn Superintendert W. J. Rapend, Resider.t Inspector Mi11 stere Nuclear Fewer Statier Millstone Nuclear Fewer Station hertheast Nuclear Energy Cerrpany c/c l'. S. Nuclear Regulatcry Cerrissicn Fest Office Box 128 Fo:t Office Box 811 i Waterferd, Connecticut CC385 Niantic, Connecticut CC2f7 J. S. Keenan, Unit Superintendent Charles Drinkman, Manager M111stene Unit No. 2 Washington Nuclear Operations Ncriteas, huclear Energy Cerpany C-E Pcwer Systers Post Office Box 128 Cerbustion Engineering, Inc.

Waterford, Connecticut CC565 7910 Weedmont Avenue Pethesda, Mary 1'nd 2CE14 1 l

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