ML17037C208

Letter Informing That Proposed Cask Drop Protection System Is Acceptable for Installation at Nine Mile Point Unit 1

ML17037C208
Person / Time
Site:	Nine Mile Point
Issue date:	08/15/1973
From:	Skovholt D US Atomic Energy Commission (AEC)
To:	Raymond P Niagara Mohawk Power Corp
References
Download: ML17037C208 (6)

Text

e ItIVG 1g t9g Docket No. 50-220 Niagara Mohawk Power Corporation ATTN:

Hr. Philip D. Raymond Vice President Engineering 300 Erie Boulevard Vest

Syracuse, New York 13202 DISTRIBUTION Docket File AEC PDR, RP Reading File Branch Reading File DJSkovho'lt, L:OR

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OGC 886heeme DLZiemann, L:ORBN2

TJCarter, L:OR CJDeBevec, L:ORB/f2 RMDiggs, L:ORBiI2 Gentlemen:

%le have reviewed your proposed design of the Cask Drop Protection System to be installed in Nine Mile Point, Unit 1 as described in your letters to us dated September 29, 1972, and Hay 31, 1973, which supersedes the proposed design described in your application submitted July 5, 1972, for a full-term operating license.

Pe have concluded from our review that this proposed Cask Drop Protection.System is acceptable for installation at Nine Hile Point Unit, 1 and provides reasonable protectionagainst loss of integrity of the fuel pool and against damage to stored spent fuel in the event a fuel cask is dropped in the pool.

The Redundant. Hoisting System and Crane Movement Controls proposed by your letter of July 26, 1973> to be installed in Nine Mile Point Unit 1 was not, considered in our review discussed above.

This proposal willbe reviewed at a later date.

Sincerely,

+r>UrrLQl SrrRr o Qy

n. J. skovholl Donald J. Skovholt Assistant Director for Operating Reactors Dizectorate of Licensing cc:

Arvin E. Upton, Esquire LeBoeuf, Lamb, Leiby 6 HacRae 1821 Jeffexson Place, N. H.

Uashington, D. C.

2003&

J. Bruce HacDonald, Esquire Deputy Commissioner and Counsel New York State Department of Commerce and Counsel to the Oswego City Library 120 E. Second Street

Oswego, New York 13126 Dr 'Uilliam Seymour, Staff Coordinator (w/incoming of 9/29/72, 5/31/73 6 7/26/73)

N. Y. Atomic Energy Council 2 State Stre Vial"MN L:ORBS lYNTJ gg

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OCT 19 1973 Docket Ho. 50-220 Niagara Hohawk Power Corporation ATTN:

Hr. Philip D. Raymond Vfce President - Engineering 300 Erie Boulevard West

Syracuse, New York 13202 Gentlemen:

The Regulatory staff has had the subject of anticipated transients without scram (AXES) in water-cooled reactor power plants under study for some time.

The staff has completed its review of ATWS and has concluded that measures should be taken to improve nuclear plant: designs in this regard.

Details of the staff review and conclusions and of the steps

'hat should be taken to deal with ATWS are given in the staff "Technical Rcport on Anticipated Transients Without Scram for Water-Cooled Power Reactors",

September 1973, a copy of which Xs enclosed for your information.

Sou have included an analysis of-the capability of Nine kfile Point Unit 1 to accommodate an ATWS event in your application for conversion of Provisional Operating License Ho. DPR-17 to a full-term operating license.

This analysis concluded that the trip of the recirculation pumps combined with liquid poison in)ection would effectively augment the present reactor safety system design.

Zn a letter to you dated September 28, 1973, regarding additional information on the full-term 1icense review, we requested that you propose appropriate technical specifications to reflect the requirement of tripping the recirculation pumps whenever reactor pressure is equal to or greater than 1150 psia

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Niagara Hohavk Pover Corporation OtlT 1 9 1973 This approach may be consi,dered to be an acceptable measure for your facilityM reference to the provisions set forth in Section XI-C of Appendix A to the staff report on ATWS.

In addition, you are requested to xeview your analysis and conclusions against the staff position described in the enclosed repox't and confirm that your proposal is consistent with the staff position, Please provide this confirmation by December 1, 1973.

Sincerely,

~A. Gismbusso Dspusy Director for ReactorProspects Directorate of Licensing J

Enclosure:

Technical Report on Anticipated Tx'ansients Without Scram for Water-Cooled Power Reactors cc v/enclosure-'.

Bruce HacDona3.d, Esquix'e Deputy Commissioner and Counsel Nev York State Department of Commerce and Counsel to the Atomic Energy Council 99 Washington Avenue Albany, Nev York 12210 Arvin Eo Upton> Esquire LeBoeuf, Lamb, Leiby 6 MacRae Dr. William Seymour Staff Coordinator Ns Y. State Atomic Energy Council 112 State Street Albany, Nev York 12207 Distribution AEC PDR L Reading RP Reading Branch Reading DJSkovholt, L:OR AGiambusso, L:RP TJCarter,. L:OR ACRS (16)

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