ML19211C764

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Responds to Requesting Confirmation That Fuel Rod Strain & Flow Blockage Models Are Conservative.Loca Analysis Being Prepared by Vendor & Will Be Submitted in Jan 1980
ML19211C764
Person / Time
Site: Fort Calhoun 
Issue date: 01/08/1980
From: William Jones
OMAHA PUBLIC POWER DISTRICT
To: Eisenhut D
Office of Nuclear Reactor Regulation
References
NUDOCS 8001140457
Download: ML19211C764 (1)


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Omaha Public Power District 1623 MARNEV OMANA. NEBRASMA 68102

?!LEPHO N E S36 4000 ASEA 000E 402 January 3, '980 ifr. Carrell G. Eisenhut, Acting Director Division of Operating Reactors Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Comission Washington, D. C.

20555

Reference:

Occket No. 50-235

Dear Mr. Eisenhut:

The Cmaha Public Power District received the Comission's letter of November 9,1979, requesting that a review be concucted to ensure that new fuel cladding strain and fuel assembly flow blockage medels, used in the Fort Calhoun Station ECCS calculations, are conservative with respect to the Staff's new models.

This letter is to inform you that the District's fuel vendor, Exxon Nuclear Co., Inc., is currently preparing a large break LOCA analysis, in support of Fort Calhoun Station Cycle 5 operation, which employes the Staff's recomendations contained in your letter. This analysis will be submitted to the Comission for review in January,1980.

Cycle 6 operation is scheduled to commence in mid-March,1980, af ter our 1980 refueling outage.

It is believed that the Staff's review of our analysis will resolve the flow blockage issue for the Fort Calhoun Station.

Sincerely, W. C. Jones Division Manager Production Coerations WCJ/KJM/sJH/1p d'

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