ML19316A308
| ML19316A308 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 04/21/1977 |
| From: | Parker W DUKE POWER CO. |
| To: | Rusche B Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19316A309 | List: |
| References | |
| NUDOCS 7912050878 | |
| Download: ML19316A308 (2) | |
Text
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DATE oF DOCUMENT Duke Power Company 4/21/77 Charlotte, North Carolina Mr. Benard C. Rusche Mr Willima O Parker, Jr.
4/26/77
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Consists of Report entitled Evaluation of Potential for Turbine Building Flooding"..
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Mr. Benard C. Rusche, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Re: Oconec Nuclear Station Docket Nos. 50-269, -270, -287
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Dear Mr. Rusche:
In an October 25, 1976 letter (Reportable Occurrence Report R0-287/
76-18) to Mr. Norman C. Moseley, NRC/0IE, Region II, an incident was described in which the Oconee Nuclear Station Turbine Building had become partially flooded. This action had resulted from a combination of the following events:
the Oconee Unit 3 condenser manways were opened for inspection; a failure of the power supply which provides power to solenoids controlling pneumatic piston-operated condenser circulating water discharge valves; and the failure of a jackscrew device which maintained these valves closed. Immediately following this incident, an investigation was initiated to determine the cause and to make recommendations to prevent recurrence. Additionally, a study was commissioned in which a determination would be made as to any potential sources of flooding, and if should occur, to provide additional assurance that critical equipment in the Turbine Building and/or Auxiliary Building would be adequately protected. The incident investigation and our more detailed study of the potential for Turbine Building flooding were described in meetings with members of your staff on November 9, 1976 in Bethesda and November 19, 1976 at Oconee. The purpose of this letter is to appraise you of our approach to final resolution. The attached report details those actions to be taken.
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/ William O. Parker, Jr.v MST:vr Attachment ec:
Mr. Norman C. Moseley
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