ML20207M880

Provides Summary Rept of Unusual Event at Facility,Per Rev 1 to NUREG-0654.On 870102,smoke Discovered in Area of High Pressure Turbine at Unit 1.Caused by Minor Bearing Shaft Seal Leak.Event Did Not Affect Health & Safety of Public

ML20207M880
Person / Time
Site:	Diablo Canyon
Issue date:	01/05/1987
From:	Thornberry R PACIFIC GAS & ELECTRIC CO.
To:	Briam W SAN LUIS OBISPO, CA
References
RTR-NUREG-0654, RTR-NUREG-654 NUDOCS 8701130320
Download: ML20207M880 (2)

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I PACIFIC GAS AND E LE C T RIC C O M PANY

, DIABLO CANYON POWER PLANT RO. Box 56. Avila Beach California 93424 . (805) 595-7351 lllllllll R C. THORNBERRY PLANT MANAGER January 5, 1987 Mr. William Briam, Administrator San Luis Obispo County Administrative Office County Government Center San Luis Obispo, CA 93408

Dear Mr. Briam:

Pursuant to NUREG-0654. Revision 1, Appendix 1, the following is a summary report concerning an Unusual Event at the Diablo Canyon Power Plant site.

l At 1715 PST, January 2,1987, smoke was discovered in the area of the Unit 1 High l Pressure Turbine. The smoke was determined to be coming from lubricating oil

. smoldering in steam line insulation. Subsequent investigation has revealed the source of the oil to be a very minor bearing shaft seal leak. An Unusual Event was declared by the Shift Foreman at 1742 PST. The California Department of Forestry was called in and other emergency notifications were initiated.

Notifications were initially conducted to organizations as appropriate for a l Significant Event, rather than an Unusual Event and resulted in a delay of about li hours in notification of the County Sheriff. We are taking corrective 7

measures to assure this delay does not occur again. The unit was shutdown at 1818 PST and the fire was reported out at 1850 PST.

At 1916 PST, January 2,1987, the Unusual Event was concluded. This event 8.as in no way affected the health and safety of the public and no discharge of radioactive materials was made to the environment.

l

&L R. C. Thornberry RCT:1m ,

8701130320 870105 "

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l cc Mr. Benjamin P. Tong, Chief Nuclear Power Plant Planning P. O. Box 9577 Sacramento, CA 95823 Mr. John B. Martin, Administrator U. S. Nuclear Regulatory Commission, Region V 1450 Maria Lane, Suite 210 Walnut Creek, CA 94596-5368 Mr. George Whiting, Sheriff San Luis Obispo County P. O. Box 32 San Luis Obispo, CA 93401 Mr. George W. Knighton, Chief Licensing Branch No. 3 Division of Licensing Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Director, Office of Management Information and Program Control U. S. Nuclear Regulatory Commission Washington, D. C. 20555 l

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