ML20039C454
| ML20039C454 | |
| Person / Time | |
|---|---|
| Site: | McGuire  |
| Issue date: | 12/18/1981 |
| From: | Parker W DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 8112290366 | |
| Download: ML20039C454 (2) | |
Text
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December 18, 1981 rca m i.c. 7c.
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c.c.. a.cm eme 2n..:a3 c)g l t p [,b Mr. J. P. O'Reilly, Director U. S. Nuclear Regulatory Commissioa g
Region II
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101 Marietta Street, Suite 3100 1;
Atlanta, Georgia 30303 h
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'j Re: McGuire Nuclear Station Unit 1
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Docket No. 50-369
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Dear Mr. O'Reilly:
Please find attached a special report submitted pursuant to Technical Specification 6.9.2.
This report concerns violation of T.S.3.7. ll, "All fire barrier penetrations (including cable penetration barriers, firedoors and fire dampers) in fire zone boundaries protecting safety-related areas, shall be functional". The actions taken described in the report will ensure the safe operation of the plant and the health and safety of the public.
Note that the annual fire protection audit discovered other fire barriers breached, but since these were restored to functional status within seven days they were not required to be included in this special report. These were reported to the commir.sion via LER report RO 369/81-184.
Very truly yours,
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William O. Parker, Jr.
PBN/jfw Attachment cc: Director Records Center Office of Manage ent and Program Analysis Institute of Nuclear Power Operations U. S. Nuclear Regulatory Cornission 1820 Water Place Washington, D. C.
20555 Atlanta, Georgia 30339 sP M
Mr. P. R. Bemis t
Senior Resident Int pector-NRC McGuire Nuclear Station 7
OFFICI AL COPY 8112290366 811218 POR ADOCK 05000369 S
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DUKE POWER COMPANY McGUIRE NUCLEAR STATION Special Report - Fire Barrier Penetrations December 18, 1981 During performance of the Annual Fire Protection Audit conducted in accordance with Technical Specification 6.5.2.91 on November 16-18, 1981, several pecetra-tions were detected in a fire boundary that were not properly sealed. This boundary is the roof of the Auxiliary Building south of the wall separating the safety related areas of the Auxiliary Building from the non-safety related areas.
The areas of the roof in question are located at approximately elevation 788+0.
At each of these locations two HVAC ducts penetrate the wall, come out above the Auxiliary Building roof inside a penthouse, and then turn and pass through the roof back into the Auxiliary Building.
In addition, four pipes also pass through the vall and the roof.
These penetrations were discussed with the resident NRC inspector by Duke Power Company and it was agreed that since the HP offices located directly below the penetrations are occupied twenty-four hours a day, an additional fire watch would not be required.
The McGuire Nuclear Station Fire Protection Review dated September 1977 and revis.
January 1979 states that the walls, floors, and ceilings of this area are reinforced concrete constructed providing 3-hour fire boundaries. The Review further states that mechanical and electrical penetrations in rated barriers are scaled with an approved silicone foam rated for 3-hours and ventilation ducts are protected with I hour UL rated fire dampers.
Drawings showing the boundaries of the fire areas are referenced in the Review.
These drawings also show fire rated walls within the boundaries, however the draw-ing showing the Auxiliary Building roof does not specify the roof as being a fire barrier. These drawings were used to determine where penetrations are re-quired to be scaled and therefore, the roof penetrations were omitted. This draw-ing will be revised to show the roof as a fire barrier.
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Fire dampers will be installed in each of the four ducts, and sealing placed around I
the duct penetrations. The four pipe penetrations will also be sealed at the time the duct penetrations are sealed. Fire dampers with three-hour fire rating have been ordered and are expected to be delivered by January 31, 1982.
Installation of the dampers and sealing of the penetrations is expected to be completed by February 15, 1982.
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