ML20129B872

Forwards Safety Evaluation Supporting Response to Generic Ltr 81-21 Re Reactor Vessel Upper Head Steam Formation During Natural Circulation Cooldown.Cooldown to DHR Sys Actuation Can Be Performed in 8 H W/O Void Formation

ML20129B872
Person / Time
Site:	Arkansas Nuclear
Issue date:	07/11/1985
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Jeffery Griffin ARKANSAS POWER & LIGHT CO.
Shared Package
ML20129B877	List: ML20129B872 ML20129B949
References
GL-81-21, NUDOCS 8507290285
Download: ML20129B872 (2)

Text

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.. JUL 111985 Docket No. 50-313 DISTRIBUTION

• Dochet Files JPartlow NRC PDR ACRS-10 L PDR RIngrum Mr. John Griffin ORB #4 Rdg GVissing Senior Vice President HThompson Gray File of Energy Supply OELD EBrach Arkansas Power and Light Company EJordan H0rnstein P. O. Box 551 BGrimes KHeitner Little Rock, Arkansas 72203 RJones

Dear Mr. Griffin:

We have completed our reviewed of your response to our questions (Generic t.etter 81-21) regarding reactor vessel upper head steam formation during a natural circulation cooldown for Arkansas Nuclear One, Unit 1 (ANO-1).

You have performed analyses for a natural circulation cooldown using continuous venting of the reactor vessel head and you have committed to revise your natural circulation cooldown procedure to reflect the method analyzed.

We have determined that your responses are acceptable. We have concluded that ANO-1 can perform a natural circulation cooldown to Decay Heat Removal System actuation conditions in approximately eight hours without void formation.

Our associated Safety Evaluation Report is enclosed.

Sincerely,

%uu.a. a a.u ut J(ani J. 31%4" John F. Stolz, Chief Operating Reactors Branch #4 Division of Licensing

Enclosures:

As Stated ,

cc w/ enclosures:

See next page

/ RB#4:DL OR@ :DL GVissing;cr JStbi 7/// /85 7/ / SV 8507290285 850711 DR ADOCK 050 3y3

q. .

Pr. J. M. Griffin Arkansas Power & Light Company Arkansas Nuclear One, Unit I cc:

Mr. J. Ted Enos, Manager Licensing Arkansas Power & Light Company P. O. Box 551 Little Rock, Arkansas 72203 Mr. James M. Levine, General Manager Arkansas Nuclear One P. O. Box 608 Russellville, Arkansas 72801 Mr. Nicholas S. Reynolds Bishop. Liberman, Cook, Purcell & Reynolds 1200 Seventeenth Street, NW Washington, D.C. 20036 Mr. Robert B. Borsum Babcock & Wilcox ,

Nuclear Power Generation Division -

Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814 Resident Inspector U.S. Nuclear Regulatory Comission P. O. Box 2090 Russellville, Arkansas 72801 '

Regional Administrator, Region IV U.S. Nuclear Regulatory Comission Office of Executive Director -

for Operations 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011 Mr. Frank Wilson, Director Division of Environmental Health Protection Department of Health

' Arkansas Department of Health 4815 West Markham Street Little Rock, Arkansas 72201 Honorable Ennil Grant Acting County Judge of Pope County Pope County Courthouse Russellville, Arkansas 72801

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