ML17037C243

Letter Responding to the September 29, 1972 Letter and Concluding That Unit 1 Has Adequate Design Features for Protection Against the Rupture of a Non-Class I Component or Piping with a Coincident Loss of Offsite Power

ML17037C243
Person / Time
Site:	Nine Mile Point
Issue date:	03/29/1974
From:	Skovholt D US Atomic Energy Commission (AEC)
To:	Raymond P Niagara Mohawk Power Corp
References
Download: ML17037C243 (4)

Text

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Docket Pile MAP r0 9 1974 ABC PDR Local PDR

\ DJSkovholt Docket No. 50-220 Branch Reading ACRS (16)

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OGC TJCarter DLZiemann Hiagmt Pahawk Po ver Corporation CJDeBevec ATTN: 3h. Philip D. Raymond RNDiggs Vice President - Chief Kn~eer SVarga 300 Erie Boulevax6 Vest SKari Syracuse, New York 13202 knell gSc/i<<X Ci~g Gentlemen:

In response to our letter of August 3, 1972, re@mUng the possible failure of non-class I seismic equipment which could cause flodding and adversely affect engineered safety systems, you submitted inform;ion in your letter of September 29, 1972, concerning Nine Nile Point Uhit l.

In our evaluation, we reviewed whether failure of any equipment could

.cause XloocKng such that ccfmon mode faQure of redundant'afety related equipment could result.

, Ve have reviewed the various water system such as th circulating water, service water, fire protection and condensate for the consequences of a possible rupture and potential .f1ooding of safety equipment. OrQy in one plant area, i.e. reactor building ECCS rooms, could safety equipment be affected by flooding and although some engineered safeguazds equipment could be lost, redundant equipment is available in another area which could safely shutdown the facility.

Ve therefore conclude that 'le M.le Unit 1 has for protection against the rupture of a non-class I component or piping adequate design features with a coincident loss of offsite power, such that engineered safety features are capable of safely shutting dorm the f'acility.

Sincerely, Dodd J. Skovholt Assistant Director for Operating Reactors Directorate of Licensing cc: See next page + j5C L:0 52~ ,,L,:9RBP, L,:,ORB, 5QAHAHC,~ ...CSO..;...g. CJDe .. c...... M5 gvbo3.t.

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'iagara Mohawk Power Corporation 2 MAR 29 1974 CC:

J. Bruce MacDonald, Esquire Deputy Commissioner and Counsel New York State Department of Commerce and Counsel to the Atomic Energy Council 99 Washington Avenue Albany, New York 12210 Arvin E. Upton, Esquire LeBoeuf, Lamb, Leiby 6 HacRae 1757 N Street, N. W.

Washington, D. C. 20036 Dr. William Seymour Staff Coordinator New York State Atomic Energy Council New York State Department of Commerce 112 State Street Albany, New York 12207 Anthony Z. Roisman, Esquire Berlin, Roisman and Kessler 1712 N Street, N. W.

Washington, D. C. 20036 Oswego City Library

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