ML19326C778
| ML19326C778 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/21/1978 |
| From: | David Williams ARKANSAS POWER & LIGHT CO. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| 1-048-15, 1-48-15, NUDOCS 8004280713 | |
| Download: ML19326C778 (2) | |
Text
NR0 '" r.M 495 U.S. NUCLEAR CEGULATORY (
WSSION OCCKET NUMIE R 12 7ei SD 3/3 NRO DISTRIBUTION roR PART 50 DOCKET MATERIAL lTO:
Mr. R.W. Reid FROM: Ark. Power & LLight Co.
DATE F0 UMENT f
Little Rock, Ark.
72203 D. H. Williams DATE El O
25.ETTE n CNoToRtzED PROP INPUT FORM NUMBER OF CDPtES RECEIVED CORio:NAL MC LAS$1FIE D WC0" t
reL2W cEsCRIPTION Ltr furn addl inf0 On ECCS small ENCLCSURE l
break analysis interim solution....1P 3
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THis DOCUMENT CONTAlNS POOR QUAUTY PAGES E
PLANT NAME : Ark. One Unit 1 DHL 4-24-78 nur & P D em #whs garrTv FOR ACTION /INFORMATION ENVIRONMENTAL act'cNen AD:
ASSIGNED AD:
V. MOORE (LTR)
BRANCH CHIEF:
BRANCH CHIEF:
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April 21, 1978 I
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L 1-m e-is li Director of Nuclear Reactor Regulation ATT't:
Mr. R. W. Ruid, Chief f
Operating Reactors Branch f4 l
l1. S. Nuclear Regulatory Co:rission
[
Washington, D. C.
20535 i
Subject:
Arkansas Nuc1 car One-Unit 1 Docket No. 50-313 j,
1,1 cense No. DPR-51
~
h Raportable occurrence No. 50-313/78-9 ECCS Scall Break Analysis i
Interim Solution (File: 0520)
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centie:.en:
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As a followup to Mr. Ruater's letter on the above captioned i
subject earlier today, the following infor ation is provided in response j
to Mr. Vissing's requests for additional information.
p Based on cos:unication with BW ve believe that 100% Tull Powar (FP) op.: ration with one :sakeup pump in operation co.nbined with our proposed lateria fix provides substantial margin to 10CFR50.46.
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- te vill submit the results of the Br4 analysis including break spectru:n, h,
identification of worst break, justification for adequacy of core uncovery F
ta=peratures, and justification that ti=c scale for operator is within y
analysis assu=ptions, as soon as they are available.
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'Je will subnit a Technical specification change request (per your request) as appropriate to imple=ent the interim fix.
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We v111 submit a proposal for a 1cng term fix, with 1sss ra11ance on a g ']
high state of operator readiness, within three (3) ::enths of this date.
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Very truly yours.
fQ I
S Daniel H. Wil11ans f
Manager, Licensing DW:J!Et tv c
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