ML19326C682
| ML19326C682 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/07/1976 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Phillips J ARKANSAS POWER & LIGHT CO. |
| Shared Package | |
| ML19326C683 | List: |
| References | |
| NUDOCS 8004250497 | |
| Download: ML19326C682 (2) | |
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Docket No. 50-313
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Arkansas Powr % Licht Company
. ~f ATTil: :;r. J. D. Phillips
'NE Senior Vice President
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Production Transmission and Engineering Sixth and Pine Streets
-7 Pine Bluff, Arkansas 71601
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RE : ARKAMSAS MUCLEAP, O'4E - ANO-1 4
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urino the course of our review of energency core coolira syster (ECCS) n ovaluation models, it has cone to our attention that the Rabcock and
'filcox (Dia) ECf.S evaluation nodel, which was used for' your facility,.
nses a nucleate boilino heat transfer correlation du^q hlowdown after critical heat flux (CI'F) is first predicted.
This
- 1t conforn to the recaire wnts of Appen:iix X to 10 CFR 50.
The er :.a la for corviliance.~
'ith 5.apendix K have been established by the 'iRC staff and discussed with n~J! representatives.
Enclosed is a copy of our letter to PW requesting that a correctc,3 ECCS nodel be sutnitted for our evaluation as soon as r,oss i bl e.
This natter i.s si.*ilar to one i_dentified with respect to another nuclear steau systea suoplier's evaluation model; and, based on our experience in connection with developing a correction for that_riodel, we have concluded that there are acceptable correlations which can be.used and mich have a 5S11 effect on the calculated ceak clad temperature.
It is excceted tnat i.he effect on calculated peak clad tercerature would be small enough so that modification of your tecimical specifications would-not be requi. ed: however, this must be verified for your facility by reevaluation of the ECCS cooling performance using a corrected raodel.
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- 7' 1 THIS DOCUMENT,CONTAINS
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POOR QUAUTY PAGES
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s Arkansas Power ?. Light Company DEC 7 1976 Accordingly, sutx,it is soon as possible a reevaluation of your ECCS cool'ing performance using an NRC staff approved raodel that does not
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use a nucleate boiling heat transfer correlation during blowlown after CHF has been predicted by the approved CHF correlation.
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Dennis L. Ziemann,' Chief Operating Reactors Branch #2 7
Division of Operating Reactors
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DISTRIBUTION
- b,3-Horace Jewell, Esquire Docket House, Holms 4 Jewell NRC PDR
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' Local PDR
'A, Little Tock, Arkansas 72201 ORB #2 Reading RHDiggs 3
u-Mr. Donald Dieter VStello bnager, Licensint; KRGoller
- rkansas Power & Light Company TJCArter s
Post Office Sox 551 RSnaider Little Rock, Arkansas 72201 RDSilver OELD 1
Arkansas Polytechnic College OI&E(3)
Russellville, Arkansas 72201 DEisenhut TBAbernathy i
Phillip K. Lyon, Esquire JRBuchanan thuse, Holr's & Jewell
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