ML18219D834

Response to Circular Letter of 2/2/1978, Furnishing Information Re Reactor Cavity Annulus Seal Ring

ML18219D834
Person / Time
Site:	Cook
Issue date:	02/22/1978
From:	Tillinghast J Indiana Michigan Power Co, (Formerly Indiana & Michigan Power Co)
To:	Case E Office of Nuclear Reactor Regulation
References
Download: ML18219D834 (6)

Text

DISTRI3UTION AFTER ISSUANCE 0 PERATEfG LICENSE NRCPORM f95 IZ 781 UA IlVCLSAR RSQVLATORY COMMISSION Nzi F fl;s~QUM sSA u4 NRC DISTRIBUTION I 4R PART M OOCKET MATERIAL

, TO: Mr Edson G~ Case FROM: OATS OP OOCVMStlT I Indiana & Michigan'ower Co, 02/22/78 New York, N Y~ f0004 OATS ASCSIYSD John Tillinghat 02 27 78 R GNOTORIXSD Iht&JT PORM NVMBSR OlI COtlas ASCSIYSD 4 RIG IMAl ~CLASNWSD CC~

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~ ~ Furnishing info concerning whether th reactor cavity annulus seal ring is left in plac during normal operation or shielding if biological

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2p COOK units 1 '& 2 jcm 02/27/78 FOR ACTION/INFORMATION BBANCH CKKF: 7 WQ Z'4'/C INTERNAL0 ISTRI BUTION I ZG B(TERNAL OISTRIBUTICN CONTROL NUMBER

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INDIANA 5 MICHIGAN POWER COMPANY P. O. BOX 18 BOWLING GREEN STATION NEW YORK, N. Y. 10004 February 22, 1978 Donald C. Cook Nuclear Plant Unit Nos. 1 6 2 Docket Nos. 50-315 and 50-316 DPR Nos. 58 G 74 Mr. Edson G. Case, Acting Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission @@ee Washington, D. C. 20555 r s

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Dear Mr. Case:

ro This letter is in response to Nr. icfor Stello, Jr.'s Circular, Letter of February 2, 1978 to all PWR Licensees (except for Trojan) requesting a statement as to whether the reactor cavity annulus seal ring is left in place during normal operation or this annulus.

additional information If if is biological shielding is installed in either of these conditions exist, requested.

An inflatable rubber seal is installed in the reactor cavity annulus of the Donald C. Cook Units 1 and 2 during refueling only and then removed after refueling operations have been completed. No biological shielding is installed within the reactor cavity annulus. Since neither of these two conditions exist during reactor power operation, these components are not missile sources at the Cook Nuclear Plant which could affect the ability of the control rods to shut down the reactor.

Very truly yours, 0 n a,s ce Pres'iden't Sworn and subscribed to before 'me this'"-+day of'ebruary,,1978 New York. County,,New York mme' Pubis iS'otary KA1'HLEEN BAl&Y

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Mr. Edson G. Case February 22, 1978 cc: R. C. Callen G. Charnoff R. W. Jurgen'sen D. V. Shaller Bridgman P. W. Steketee J I'lg I

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