PNO-I-87-105A, as of 871112,offsite Power Remained Unavailable to Site.Personnel Shutdown Emergency Diesel Generator B Due to Problem W/Transformer C,Resulting in Another Shutdown Cooling Isolation.Switchyards Sprayed

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PNO-I-87-105A:as of 871112,offsite Power Remained Unavailable to Site.Personnel Shutdown Emergency Diesel Generator B Due to Problem W/Transformer C,Resulting in Another Shutdown Cooling Isolation.Switchyards Sprayed
ML20236P682
Person / Time
Site: Pilgrim
Issue date: 11/12/1987
From: Blough R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
References
PNO-I-87-105A, NUDOCS 8711180100
Download: ML20236P682 (1)


.

DCS No: 50293871112 l' Date: 11/12/87

- PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-I-87-105A

-This preliminary notification constitutes EARLY' notice of events.of PC.SSIBLE safety J or public interest significance. The information is as initially received without

- verification or evaluation, and is basically all that is known by the Region I 4 staff on this date. l L .

Facility: Boston. Edison Company . Licensee. Emergency; Classification: .

l Pilgrim Nuclear Power Sta. Notification of Unusual: Event.

Plymouth, MA DN 50-293 Alert Site Area Emergency

)

l General Emergency l X -Not Applicable l

Subject:

LOSS OF 0FFSITE POWER (UPDATE) .,

As of 3:00 p.m., 11/12/87, offsite power remained unavailable to the site. :At 11:48:

a.m., operations personnel shutdown.the 'B' Emergency Diesel Generator due to a. problem with the 'C' phase current transformer. _ This resulted in loss of the only operable ai_r -

compressor and another shutdown cooling isolation. However, reactor. coolant temperature- ,

is stable, at approximately 170 F, due to the extremely' low decay heat loads, l l

The weather conditions have improved. The licensee continues to spray clean the switch- a yard and insulators and troubleshoot the startup transformer. Portions.of the-switch- l yard ring header have been re-energized from both incoming offsite power lines. l Two resident inspectors and a Region I DRP Section Chief are onsite monitoring. licensee actions. Two additional resident inspectors are in transit to the site. ..

The Commonwealth of Massachusetts.has been updated-on the plant status.

~N i, There has been significant media interest in the event and the licensee has issued a press release.

CONTACT: R. Blough 488-1146 DISTRIBUTION: -

H. St. MNBB Phillips E/W Willste Mail: ADM:DMB Chairman Zech ED0 NRR NMSS 00T:Trans only  !

Comm. Roberts PA OIA RES

, Comm. Bernthal OGC AE00 NRC Ops Crt l Comm. Carr Comm. Rogers ACRS Air Rights INP0----

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PDR Regional Offices TMI Resident Section RI Resident Office Licensee: ..(Reactor Licensees) 8711100100 PDR I&E 871112 i PND-I-87-105A PDR (A

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