Headquarters Daily Report
OCTOBER 12, 1999
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REPORT NEGATIVE NO INPUT
ATTACHED INPUT RECEIVED RECEIVED
HEADQUARTERS X
REGION I X
REGION II X
REGION III X
REGION IV X
PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION I OCTOBER 12, 1999
Licensee/Facility: Notification:
Northeast Utilities MR Number: 1-99-0039
Millstone 1 Date: 10/12/99
Waterford,Connecticut
Dockets: 50-245
BWR/GE-3
Subject: FUEL POOL CRANE FAILURE
Discussion:
Millstone Unit 1 is permanently shut down and has initiated the
decommissioning process. On Monday, October 11, the licensee was moving
a new fuel assembly out of the spent fuel pool, where it was stored, and
into the new fuel storage vault. During this move, however, the reactor
building crane auxiliary hook continued to drift downward past the stop
point and the fuel assembly came in contact with the refuel floor for a
short period of time. All fuel movements with the crane have been halted
pending the licensee's determination of the cause of the crane failure,
and completion of appropriate corrective measures. Prior to the crane
problem and subsequent placement of the affected assembly into the
storage vault, the licensee had succesfully transferred 16 assemblies
from the spent fuel pool to the new fuel vault. There was no visible
damage to the new assembly and no radiological consequences from this
event. NRC informed the State of Connecticut
Regional Action:
The resident inspector is following licensee actions to investigate the
crane problem.
Contact: Todd Jackson (610)337-5308
Paul Cataldo (860)447-3170
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REGION II MORNING REPORT PAGE 2 OCTOBER 12, 1999
Licensee/Facility: Notification:
Virginia Power Co. MR Number: 2-99-0015
Surry 1 2 Date: 10/12/99
Surry,Virginia
Dockets: 50-280,50-281
PWR/W-3-LP,PWR/W-3-LP
Subject: LOSS OF NORMAL FEED TO SURRY UNIT 1 H AND UNIT 2 J EMERGENCY
BUSSES
Discussion:
On October 9, 1999, at 12:41 pm., the cabling between the C reserve
station service transformer (RSST) buss work and the emergency switchgear
experienced an internal fault and caused a transformer lockout. The C
RSST is the normal feed for the Unit 1 H and Unit 2 J emergency busses.
The #1 and #3 emergency diesel generators (EDGs) started on undervoltage
to supply the Unit 1 H and the Unit 2 J busses respectively. Prior to
the event both Units 1 and 2 were at 100 percent power. There were no
unexpected effects on Unit 1; however, Unit 2 power decreased to
approximately 96 percent due to the momentary power lost to a turbine
electro-hydraulic control panel before the #3 EDG re-energized the J
buss. Unit 2 was restored to 100 percent power approximately two hours
later. Both units continued full power operation with the #1 and #3 EDGs
powering their associated emergency busses until approximately noon on
October 11 when the C RSST was restored to full service.
The cable fault was between the cable conductor and the cable aluminum
shielding at the point where the cable is attached to a lug. The
licensee suspects that a breakdown of the insulation and protective
covering at this location occurred. Samples of the material have been
sent offsite for evaluation. While the C RSST was out of service, the
material at all twelve connection points was replaced.
Regional Action:
Routine followup.
Contact: Robert C. Haag (404)562-4550
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