ML17037C236

Letter Regarding a Review of Proposed Modifications of the Reactor Building Crane to Provide a Redundant Hoisting System and Crane Movement Controls and Requesting That Niagara Mohawk Advise as to Whether Features Will Be ...

ML17037C236
Person / Time
Site:	Nine Mile Point
Issue date:	06/24/1974
From:	Goller K US Atomic Energy Commission (AEC)
To:	Raymond P Niagara Mohawk Power Corp
References
Download: ML17037C236 (8)

Text

Docket Ho. 50-220 Hiagara Hohawk Power Corporation ATTN: Hr. Philip D. Raymond Vice President - Engineering 300 Erie Boulevard Vest Syracuse, Dew York 13202 Gentlemen:

Your letter dated July 26, 1973, described the design of a proposed modification of the:fine Nile Point Unit 1 (tRP-1) reactor building crane to provide a redundant hoisting system and crane'ovement controls. Your letter dated January 25, 1974, regarding your proposal states that you plan to begin installation of the modification in July 1974. During our review .of the proposed modifications we have had a number of 'discussions with your staff including a meeting in Bethesda, IRx~land,"*on September 26, 1973.

He have completed our review and although the proposed modification of the crane is not completely designed against~ single failure, there is an additiona1 feature provided in the RP-1 spent fuel pool that offsets the concern associated with dropping the fuel cask during 'handling. This additional feature is the Cask Drop Protection System which we reviewed and authorized in our letter to you dated August 15 '973. On the basis t

of our review, we have concluded th the modifications proposed in your letter dated July 26, 1973, do not involve an unreviowed safety question although they do not fully satisfy the single failure criteria. However, the proposed modifications arc acceptable provided that (1) the trolly and the hoist are provided with variable speed controls, and (2} that the rope reeving system and fleet anglos and sheave size conform to Paragraph Hos.

H.4, if.5 and N.6 of the AXSE Standard Zo. 6 1969 for ropes, reeving and sheave .sizeso Sincerely, I&rlE. Goller Assistant Director for Operating Reactors Directorate of Licensing

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Magpra mohawk Power Corporation 2-t cc: Arvin E. 13pton, Esquire LeBoeuf, Lamb, Leiby 8 NacMe 1757 H Street, 5. U.

washington, D. C. 20036 Anthony Z. Roisn~, Esquire Berlin, Roismm and Kossler 3.732 8 Street, H. H.

washington, D. C. 20036 Oswego City Library Distribution Docket Pile AEC PDR Local PDR Branch Reading JRBuchanan ACRS (16)

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JUN 24 1974 DocI,'et;-o. 50-220 Hia~c"ara Ma~ohapjc Potter Corporation h.TK<: ! fr. Phi1 ip 9. t<aymond Vice President - Engineering 300 '.rS.o Eou3.evaxd T~'est

'3atr Yort: 13202

'yracuse, Cant3.e'en:

Your letter dated July 26,'19r3, described t'.<e design of a proposed modification of the Aine tH.le Point Unit 1 (XP-3.) reactor huU.d~mg crave to providq a redundant ho9,sting systemand crane move.'ant controls. Your 1otter datod J~-,iuary 25, 1974, re~,"ard&p your proposal- states that you gLe to b gin hxstallation M the mdLB,cation Ln July 1974. During oui review of the proposed mdifications x~e haiku had a number'f discussions with your staff includ9.ag a xaaetinj, in Bethesda, 3'arglat~d, on Soptoriber 26, 1973.

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Ue have co~>ilet'ed our reviewer and although the proposod rmdification of t'..>e crane "s not conp3.ately desi~ed aLainst single failure, there is an additional featur~+ provided in tho i~ZP-1 spent fuel pool that offsets the concern assoc'.ated arith droppino the fu 3. canc during hand3.inc. This additional fo" ture is thy 'Cas&~ Bro~ Protection Systc-, mhich wo reviewed and uthori"ed in our letter to you dkted Au~at 15, 1973. On t'e basis of our raving, me have concluded that the modL~ications proposed M your letter dated July 26, 1973, wouM'e accoptahle provided that (1) tho trolly and the hoist are provided <<ith variable speed controls, md (2) that the rope reeving system and fleet angles and sheave size conform to Paragraph ttos. <<1.4, ~~(.5 and N.6 of tthe AISE Standard Ho. 6 - 1969 for ropes, reeving and sheave sizes.

0 Hiagara?fo1>abc Power Corporation JUN $ 4 1974 Please advise uo as to (1) whether you wQ.1 incorpox'ate these features in the design, (2) your schedule for implementing all modifications associated with the reactor building crane, system and (3) what cask handling activities will occux during this period.

Sincerely, Kaxl R. Qollex'ssistant Director for Operating Reactors Directox'ate of Licensing cc: Arvin E. Upton, Esquire Dis tribution LoBoeuf, Lamb, Loiby & 5~1cRae Docket File 1757 H Street, 14. M. AEC PDR Washington, D. C. 20036 Local PDR Branch Reading Anthony Z. Roisman, Esquire JRBuchanan Berlin, Roisnan and Kessler ACRS.(16) 1712 N Street, H. 8, RO (3) 8'ashington, D. C. 20036 OGC Diggs, L:ORB 82 Oswego City Library TJCarter 120 E. Second Street CJDeBevec Oswego, Ney York 13126 RB P2 B 82 82 OPPICK~

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