ML19345E979

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Forwards TR-O-MCM-001,Revision 1, Evaluation of Irradiated Capsule W-225,Reactor Vessel Matls Irradiation Surveillance Program. Includes Tabulation of Changes from Original Rept
ML19345E979
Person / Time
Site: Fort Calhoun Omaha Public Power District icon.png
Issue date: 01/23/1981
From: William Jones
OMAHA PUBLIC POWER DISTRICT
To: Harold Denton
Office of Nuclear Reactor Regulation
Shared Package
ML19345E980 List:
References
NUDOCS 8102060481
Download: ML19345E979 (1)


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Omaha Public Power District 1623 MARNEY s OMANA, NESRASMA 68102 TELEPHONE S 36- AOOO ARE A CODE 402 January 23, 1981 Mr. Harold R. Denton, Director U. S. Nuclear Regulatory Comission Office of Nuclear Reactor Regulation Washington, D.C. 20555

Reference:

Docket No. 50-285

Dear Mr. Denton:

In accordance with 10CFR50, Appendix H, Omaha Public Power Dis-trict's letter to the Comission dated March 10, 1980, forwarded the technical report entitled " Evaluation of Irradiated Capsule W-225".

Forwarded herewith as Enclosure 1 is a revised surveillance capsule evaluation report. Additionally, all of the changes from the original report are tabulated and provided in Enclosure 2.

The original report detailed the results obtained from the evalu-ation of the first surveillance capsule removed from the Fort Calhoun Station reactor vessel. The evaluation resulted in an unexplained discrepancy between reactor vessel fluence inferred from the neutron threshold detectors within the surveillance capsule and the calculated fluence. The fluence calculation was subsequently reanalyzed, with certain improvements in the model, resulting in closer agreement between the calculated and inferred vessel fluence. Factors leading to this improved agreement are discussed in the revised report.

Sincerely,

i W. C. Jones l Division Manager i

Production Operations

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i WCJ/KJM/TLP:jmm Enclosures 00 /

l cc: LeBoeuf, Lamb, Leiby & MacRae 5 1333 New Hampshire Avenue, N.W.

Washington, D.C. 20036 ,

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8102060

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