ML19270F722
| ML19270F722 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 03/16/1979 |
| From: | Short T OMAHA PUBLIC POWER DISTRICT |
| To: | Stello V Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7903210019 | |
| Download: ML19270F722 (2) | |
Text
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Omaha Public Power District 1623 HARNEY a O M AH A.
NEBRASKA 68102 e TELEPHONE 536-4000 AREA CODE 402 flarch 16, 1979 Mr. Victor Stello, Jr. Director Division of Operating Reactors U. S. Nuclear Regulatory Commission Washington, D. C.
20555
Reference:
Docket 50-285
Dear Mr. Stello:
As requested by NRC Inspection and Enforcement Bulletin 79-01, dated February 8,1979, the Omaha Public Power District hereby gives 24-hour notice that certain safety-related electrical equipment installed at the Fort Calhoun Station has failed to meet environmental qualification criteria.
Specifically, stem-mounted limit switches, providing valve position indication, located on pneumatically operated containment isolation valves are not qualified.
Several of these switches were identified in an OPPD letter to the Commission dated March 22, 1978, responding to NRC Inspection and Enforcement Bulletin 78-04, dated March 22, 1978.
As reported in our letter of March 22, the District has performed a detailed safety evaluation, assuming complete failure of these limit switches, and concluded that the operability of associated safety-related valves is not impaired and therefore containment isolation capability remains intact.
Consequently, the health and safety of the public is not jeopardized.
A detailed written report addressing this subject will be submitted within 14 days.
Sincerely, tj
'YlO
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Mr. Victor Stello, Jr., Director March 16, 1979 U. S. Nuclear Regulatory Commission Page Two xc:
Mr. K. V. Seyfrit, Director Office of Inspection & Enforcement Region IV 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011 Mr. Robert W. Reid, Chief Operating Reactors Branch No. 4 U. S. Nuclear Regulatory Commission Washington, D. C.
20555 LeBoeuf, Lamb, Leiby & MacRae 1757 "N" Street, N. W.
Washington, D. C.
20036