ML20207K421

Clarifies 840927 Response to IE Bulletin 84-03 Re Refueling Cavity Water Seal Concerning Pneumatic Seals.Seal Design Upgraded to Include Capability to Sustain Loss of Air to One Set of Seals W/O Loss of Function in Preventing Water Loss

ML20207K421
Person / Time
Site:	Hatch
Issue date:	12/23/1986
From:	Gucwa L GEORGIA POWER CO.
To:	Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-84-03, IEB-84-3, SL-1753, TAC-64455, TAC-64456, NUDOCS 8701090416
Download: ML20207K421 (2)

Text

• Georgia Power Company

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• 333 Piedmont Avenue Atlanta, Georgia 30308 Telephone 404 5264526 l 4

1 Maihng Address:  !

Post Off:ce Box 4545 l Atlanta Georgia 30302 M Georgia Power ka age N clear Safety h ,* h

• * #NM*

and Licensing St.-1753 0560H December f3, 1986 U.S. Nuclear Regulatory Commission

REFERENCE:

Office, of Inspection and Enforcement RII: JNG Region II - Suite 2900 50-321/50-366 101 Marietta Street, N. W. IE Bulletin 84-03 Atlanta, Georgia 30323 ATTENTION: Dr. J. Nelson Grace Gentlemen:

Georgia Power Company (GPC) provided a response to IE Bulletin 84-03, Refueling Cavity Water Seal, in a letter dated September 27, 1984. Our response stated that the only pneunatic seals used at Plant Hatch were associated with the fuel pool gates and the expansion joint between units 1 and 2 in the refueling canal. We further stated that these seals were l

redundant. In order to avoid any possible misunderstanding of our September 27, 1984 bulletin response, the following points of clarification are provided for your information.

IE Bulletin 84-03 discussed a condition where one pneumatic seal was the only protection to prevent a refueling cavity water leak. The seal arrangement at Plant Hatch is clearly redundant in that failure of one of the installed pneumatic seals (due to puncturing or rupturing), will not prevent the other seals from properly functioning.

However, even though the pneumatic seals were redundant, the transfer GPC canal expansion joint pneumatic seals were not single failure proof.

has taken actions recently to upgrade the design to include the capability to sustain loss of air to one set of seals without loss of function. The pneumatic seals now have two independent air supplies (a supply from each unit), such that if the air supply is lost from one unit, the other unit's air supply should properly maintain the function of the joint seals to prevent water loss from the transfer canal.

8701090416 861223 PDR ADOCK 05000321 Q PDR f

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deorgia Power b U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region II - Suite 2900 December 23, 1986 Page 2 If you have any questions regarding this matter, please feel _ free to contact this office.

Sincerely, L. T. Gucwa JCJ/jhu c: Georgia Power Company U.S. Nuclear Regulatory Commission '

Mr. t . P. O'Reilly Mr. P. Holmes-Ray, Senior Resident Mr. J. T. Beckham,' Jr. Inspector - Hatch Mr. H. C. Nix, Jr.

GO-NORMS l

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