ML20040E170
| ML20040E170 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 01/28/1982 |
| From: | William Jones OMAHA PUBLIC POWER DISTRICT |
| To: | Clark R Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20040E171 | List: |
| References | |
| LTC-82-022, LTC-82-22, NUDOCS 8202030209 | |
| Download: ML20040E170 (1) | |
Text
s Omaha Public Power District 1623 HARNEY a OMAHA. NEBRASKA 68102 a TELEPHONE 536-4000 AREA CODE 402 January 28, 1982 LIC-82-022 e-m a
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Mr. Robert A. Clark, Chief p
RECE!ygg U. S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation FEB2 iggs 7 v; "$7[pirm h!
Division of Licensing n
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Operating Reactors Branch No. 3 Washington, D.C.
20555 q,
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Reference:
Docket No. 50-285
Dear Mr. Clark:
The attached report was requested during a telephone discussion between Mr. T. Patterson and Mr. R. Kellogg of Omaha Public Power District, Mr. E. Tourigny of your staff, and Mr. Carl Czajkowski of Brookhaven National Laboratory. The report presents the results of a detailed examination perfonned on severely corroded reactor coolant pump (RCP) case closure studs from the Fort Calhoun Station. The closure studs corroded as a result of leakage past the casing flexitallic gaskets, as reported in the Fort Calhoun Station Licensee Event Report 80-10, dated June 17, 1980.
The sixteen RCP closure studs for each of the four pumps were again visually inspected during the recently completed refur. ling outage.
Boric acid residue was noted on studs for pumps A, B, C, and D.
For pumps A and B, five studs from each pump were replaced and four studs from pump C were replaced.
However, the worst noted corrosion was about one-quarter inch wastage, which would not be a threat to the stud's effectiveness.
The inspection program which has been implemented pro-vides for monitoring corrosion and implementing any required corrective action.
Sincerely, W.C./, Jones N
Division Manager Production Operations y/
I WCJ/KJM/TLP:jmm Attachment
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cc:
LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.
Washington, D.C.
20036 8202030209 820128 PDR ADOCK 0500028S P
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