ML20003E932

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Provides Justification for Continued Safe Operation of Facility in Response to 810327 Ltr W/List of Potential Deficiences Re Environ Qualification of safety-related Electrical Equipment
ML20003E932
Person / Time
Site: Fort Calhoun Omaha Public Power District icon.png
Issue date: 04/08/1981
From: William Jones
OMAHA PUBLIC POWER DISTRICT
To: Novak T
Office of Nuclear Reactor Regulation
References
NUDOCS 8104170527
Download: ML20003E932 (2)


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' Z-g, p' Omaha Public Power District 1623 HARNEY e O M AH A. NEBRASKA 68102 s TELEPHONE 536 4000 AREA CODE 402 April 8, 1981 Mr. Thomas M. Novak Assistant Director for Operating Reactors U. S. Nuclear Regulatory Commission Division of Licensing Washington, D.C. 20555

Reference:

Docket No. 50-285

Dear Mr. Novak:

The Commission's letter dated March 27, 1981, provided the pre-liminary results of your review of the environmental qualification of safety-related electrical equipment installed in the Fort Calhoun Station Unit No.1. Included in the Commission's letter was a list of potential equipment deficiencies. Omaha Public Power District has completed a preliminary review of the Commission's list of potential deficiencies and, as a result of this review, the District believes that continued safe operation of the Fort Calhoun Station is justified. A l summary of the District's justification is provided below.

The Commission's letter identified several concerns generic to much of the District's equipment, including: (1) lack of a complete display instrumentation listing and associated qualification information, (2) a LOCA temperature less than the saturation temperature for the predicted peak pressure, (3) effect of the Main Steam Line Break (MSLB) temper-l ature profile on environmental qualification not analyzed, (4) effects l of caustic spray on some equipment not justified, and (5) the radiation level used for qualification did not " envelope" the 00R guidelines value ~

of 4x107 rads. The Commission's letter also included a list of specific equipment deficiencies, but did not provide detailed info: nation.

Therefore, it was assumed that the generic concerns listed above were the pertinent concerns on specific equipment, unless the District had identified open items in our earlier submittals. Therefore, the Dis-

, trict evaluated the five generic concerns identified in the Commission's l letter, as it related to safe operation of the plant. In all cases for the Fort Calhoun Station, the District believes adequate information has been provided to the Commission to support adequate environmental quali-fication of all safety-related equipment. This information that has been provided to the Connission may not be in the format desired or of sufficient detail, but in all cases supporting information is available.

Therefore, it is the District's conclusion that the potential defi-ciencies identified in the Commission's letter did not identify any concerns that posed a threat to continued safe plant operation. b \

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l 8104170527 i

,,. i' Mr. Thomas M. Novak April 8, 1981 Page Two The detailed deficiencies identified in the Commission's Safety Evalu-ation Report (SER) will be addressed in detail once it is received. The potential deficiencies identified in the Commission's ~ letter dated March 27, 1981, identified no areas of concern regarding safe operation of the Fort Calhoun Station and, pending receipt of the Commission's more detailed SER, the District believes that continued safe operation is justified.

Sincerely, I

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W. C. Jones Division Manager Production Operations WCJ/KJM/TLP:jmm cc: LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.

Washington, D.C. 20036 Subscribed and sworn to before me this C . day of f - , ~ , 1981.

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. Notary Public l

l l cessam nommy-si.i. e n.w.m.

l J. T. GUMSON .

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