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Event Notification Report for September 18, 2008

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
09/17/2008 - 09/18/2008

** EVENT NUMBERS **


44483 44498

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Power Reactor Event Number: 44483
Facility: OCONEE
Region: 2 State: SC
Unit: [1] [2] [3]
RX Type: [1] B&W-L-LP,[2] B&W-L-LP,[3] B&W-L-LP
NRC Notified By: JAMES WEAST
HQ OPS Officer: VINCE KLCO
Notification Date: 09/11/2008
Notification Time: 22:45 [ET]
Event Date: 09/11/2008
Event Time: 21:35 [EDT]
Last Update Date: 09/11/2008
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
CHARLIE PAYNE (R2)
MICHELE EVANS (NRR)
ANTHONY McMURTRAY (IRD)

Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N Y 100 Power Operation 100 Power Operation
2 N Y 100 Power Operation 100 Power Operation
3 N Y 100 Power Operation 100 Power Operation

Event Text

OFFSITE NOTIFICATION DUE TO WORK-RELATED FATALITY

"On Tuesday, September 9, 2008 a maintenance contractor suffered an apparent heart attack at approximately 0900. On site Medical Emergency Response personnel responded until ambulatory transport to Oconee Medical Center and then Greenville Memorial Hospital. On Thursday, September 11, 2008 at 1755 he passed away at Greenville Memorial Hospital.

"At 2135 on September 11, 2008, Oconee Environmental Health and Safety notified OSHA due to the death of an Oconee contractor. This notification is being made in accordance with Duke Energy Corporation administrative procedures due to notification of a federal agency.

"Licensee notified the NRC Resident Inspector."

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Power Reactor Event Number: 44498
Facility: MONTICELLO
Region: 3 State: MN
Unit: [1] [ ] [ ]
RX Type: [1] GE-3
NRC Notified By: RANDY SANDS
HQ OPS Officer: BILL HUFFMAN
Notification Date: 09/17/2008
Notification Time: 11:40 [ET]
Event Date: 09/17/2008
Event Time: 10:17 [CDT]
Last Update Date: 09/17/2008
Emergency Class: UNUSUAL EVENT
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLARED
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
ANNE MARIE STONE (R3)
JOHN THORP (NRR)
ERIC LEEDS (ET)
MARK SATORIOUS ()
BRIAN McDERMOTT (IRD)
VIA (FEMA)
HILL (DHS)

Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode
1 N N 0 Cold Shutdown 0 Cold Shutdown

Event Text

UNUSUAL EVENT DUE TO LOSS OF SHUTDOWN COOLING

Monticello lost the 1R offsite power transformer due to an industrial accident that grounded the bus and resulted in a fatality of an employee onsite. At the time of this event, the 2R offsite transformer was already out of service due to a previous event (see EN #44484). This effectively resulted in a loss of all normal offsite power. The 1AR safety related offsite power source remained available and the safety related buses are energized and diesels are available. However, shutdown cooling was lost during the event due to a Group 2 isolation and cannot be restored. The shutdown cooling suction isolation valves #2020 and #2030 have power but until the Group 2 logic can be reset the valves cannot be reopened. The licensee needs to repower the RPS bus to reset the logic. Based on the uncertainty in reestablishing shutdown cooling an Unusual Event was declared based on Emergency Director judgment (EAL HU5.1). Current reactor coolant temperature is approximately 110 degrees with a heatup rate of about 20 degrees an hour.

State and local authorities and the NRC resident inspector have been notified. The licensee will likely be making a press release.

* * * UPDATE AT 1417 EDT ON 09/17/08 FROM CORY JASKOWIAK TO S. SANDIN * * *

"On Wednesday, September 17, 2008 Monticello Nuclear Generating Plant (MNGP) experienced a loss of power to the station transformer resulting in a valid actuation of the following systems: Reactor Protection System (with the reactor shutdown), Containment Isolation, and Emergency Diesel Generators.

"The cause of the loss of power was due to contact of a 115kV transmission line by a manlift. A vendor employee was electrocuted. On-site Medical Emergency Response personnel responded until the individual was transported to North Memorial Medical Center. The individual was pronounced dead at North Memorial Medical Center.

"Notifications of offsite agencies and a media press release are in progress. 'This notification is being made in accordance 10CFR50.72(b)(2)(xi) and 10CFR50.72(b)(3)(iv)(A).'

"Licensee notified the NRC Resident Inspector."

Notified R3IRC (Garza)


* * * UPDATE AT 1715 EDT ON 09/17/08 FROM R. BAUMER TO S. SANDIN * * *

"This is a follow-up to Event notification #44498. The station has completed notifications to off-site agencies and to the media. The station continues to troubleshoot and restore plant equipment and respond to media inquiries.

"NUE update - As of 1113 CDT shutdown cooling was restored."

Notified R3IRC.

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Thursday, March 29, 2012