ML19326C699
| ML19326C699 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 05/10/1978 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| Shared Package | |
| ML19326C700 | List: |
| References | |
| NUDOCS 8004250511 | |
| Download: ML19326C699 (3) | |
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DISTRIBUTION:
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Arkansas Power a light Coseany
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ATlM: Mr. Willin Cavanaugh, III,
" Attorney, OELD Y[A &,
Encutive Director, Generation * " 0ISE~(3)
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and Construction Department E4'DEisenhut
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P. O. Box 551 4
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A 13rce nuder of PW Wigh Pressure and Low Preswre Safety Injection Systens (HPSI and LPSI) utilize a common low pressure and a. connen high pressure header to feed the several cold (and in'some cases bot); leg s
injection points. $4aintenance,of procer flow resistance and ' pressure b"
drop in the piping system to each injection point is necessary to:,
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(1) prevent total pump flow from exceeding' runout condit'fons when the systen is in its,minimas resistance configuration; (2) provide.a4
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proper flow split between injection peints in accordance witti the'j
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assumptions used in the ECCS-LOCA analyses, and (.3) provide an acceptable.Y level of total CCCS flow to all injection points equal to or ahoes that assuesd in the ECCS-LOCA analyses., Many plants have either manual.~ or:
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notor ct+ rated valve (s) in the lines to each injection point' that have elec trics) or mechanical steps whicu have been adjusted durfog pre-
.?4' operational testing of the plant to ensure that tnese flow regaf raments
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m In view of_ the safety.fanction assoc;i.ated with the _ proper setting;of
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valves used.to throttleaflow.in. these systems,"we consider 1t appropriate y' j ~
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that periodic verification be made of these ' valve positions.I.Jccordingly,;
I we request that you seternine 1f titrottle. valves are'used to obtai&_the y M,N
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required flow distributionLin the MPSI er LPSI systems. If:throttl-e. f valves are used, we-regeest"that you propose changes to your-technic ~ar c," r]
specifications.to' incorporate the survelhlance requirements given:Ta. s f, f the enclosure.
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G i h,, 4 In the event valves,are not.utfilzed to throttle flow in yourisystems.
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The above action should be ctmpleted within 60 days of receipt' of' u
this letter.
In the event you should desire further discussion of _
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m..y. Robert L Reid, Chief
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Enclosure:
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Technical Spectficat'ons A
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Arkansas Power & Light Company cc Phillip K. Lyon, Esquire House, Holms & Jewell 1550 Tower Building Li ttle Rock, Arkansas 72201 Mr. Daniel H. Williams Manager, Licensing Arkansas Power & Light Company Post Office Box 551 Little Rock, Arkansas 72203 Mr. John W. Anderson, Jr.
Plant Superintendent Arkansas Nuclear One Post Office Box 608 Russellville, Arkansas 72801 Arkansas Polytechnic College Russellville, Arkansas 72801 0
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