ML19317H163

Requests Addl Info Re ECCS Equipment Failure & Performance Analysis.Verification Supporting ECCS & Supporting Subsys Single Failure Criteria & Proposed Design Mod Implementation Required within 60 Days of Receipt of Ltr

ML19317H163
Person / Time
Site:	Arkansas Nuclear
Issue date:	05/07/1976
From:	Ziemann D Office of Nuclear Reactor Regulation
To:	Phillips J ARKANSAS POWER & LIGHT CO.
References
NUDOCS 8004210628
Download: ML19317H163 (6)

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RE: ARKANSAS NUCLEAR'ONE - UNIT NO. 1^

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The Acceptance Criteria for Emergency Core Cooling Systems for Light Water Nuclear Power Rc actors, 10 CFR Part 50.46, requires that an analysis of

_ possible failure modes.of ECCS equipment _ and of,.their ef fects on,.EC,CS, hy&

3 a e..e performance'be perfor.med. -3.t.his.-a.n. al. ys.i,.s shou ld.. de.,m.ons tra te tha..ts yo.u. r. ECC8 %'v 4 ~

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< that'documentat. ion of"this analys.is)he provided in sufficient detail'to Fj.

Eemable.the staff to (1)f verify -that the analysis demonstrates that the ECCS E

~ rad supporting.' subsystems meet the'aingle" failure" criterion;as def~ined im]P

,IEEE'Std 179-1971, and (2) determide thei accept' ability and verify't'he 7OV

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.;implimentation :of anyOroposed.desi'gm[medification,.informatten re J

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- ' reference info..rmatten presently on the d'oike't is acceptable as s' basi fo'e.g.e" s

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our review'. ' Five c'epies of requested FEIDs and electrical drawings are *' ~

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asincerely, Ct-1M' n1 Signed by:1

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@Sl DOCUMENT CONTAINS 9 d.br:

'*4 POOR QUAUTY 'PlGES Dennis I Z O E n, Chief Operati.g Reactors Branch f2 Division of Operating Reactors r

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Request for Addit ional o.: 0

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Focus AEC.318 (Rev. 9-53) AE"M 0240

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e Arkansas Power 6 Light Company Vlty *y ',1978 cc w/ enclosure:

Horace Jewell, Esquire House, Holms 6 Jewell 1550 Tower Building Little Rock, Arkansas 72201 Mr. William Cavanaugh, III Manager, Nuclear Services Arkansas Power 4 Light Company Post Office Box 551 Little ".ock, Arkansas 72201 Arkansas Polytachnic College Russellville, Arkansas 72801 1

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A The-Acceptance Criteria _ for Emergency Core Coolin's Systems for Light [e.s y.

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n'l possible failure modes of ICCS equipment and of their ef fectsion ECCS pe$wW -

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the staff to (1) verify that the analysis demonstrates that the ECCS and.- we.

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desinatof~the ctuation system.;dIdentify any non-& fy m l

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Identify all electrical equipment, both safety and non-safety, that, w-en.,.,

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