Event Notification Report for September 01, 2005
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
08/31/2005 - 09/01/2005
EVENT NUMBERS
41967
Power Reactor
Event Number: 41967
Facility: PALISADES
Region: 3 State: MI
Unit: [1] [] []
RX Type: [1] CE
NRC Notified By: KEN JOHNSON
HQ OPS Officer: BILL GOTT
Region: 3 State: MI
Unit: [1] [] []
RX Type: [1] CE
NRC Notified By: KEN JOHNSON
HQ OPS Officer: BILL GOTT
Notification Date: 09/01/2005
Notification Time: 11:23 [ET]
Event Date: 09/01/2005
Event Time: 10:25 [EDT]
Last Update Date: 09/01/2005
Notification Time: 11:23 [ET]
Event Date: 09/01/2005
Event Time: 10:25 [EDT]
Last Update Date: 09/01/2005
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
STEVE ORTH (R3)
STEVE ORTH (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | M/R | Y | 100 | Power Operation | 0 | Hot Standby |
REACTOR TRIP DUE TO MAIN GENERATOR HYDROGEN LEAK
"The Palisades reactor was manually tripped from approximately 100% power at 1025 hours EDT due to a hydrogen leak from main generator. At 1027 hours, an automatic actuation of the auxiliary feedwater system occurred, as designed, to maintain steam generator levels. The atmospheric steam dump valves opened and reseated per design on reactor trip. Reactor decay heat is being removed via steaming through the turbine bypass valve to the main condenser. The source of the hydrogen leak was determined earlier to be a cracked weld that could not be repaired on line. The main generator must be purged in order to repair the weld.
"This is reportable under 10 CFR 50.72(b)(2)(iv)(B) and (b)(3)(iv)(A)."
All control rods fully inserted. There are no known Steam Generator tube leaks. The licensee notified the NRC Resident Inspector.
"The Palisades reactor was manually tripped from approximately 100% power at 1025 hours EDT due to a hydrogen leak from main generator. At 1027 hours, an automatic actuation of the auxiliary feedwater system occurred, as designed, to maintain steam generator levels. The atmospheric steam dump valves opened and reseated per design on reactor trip. Reactor decay heat is being removed via steaming through the turbine bypass valve to the main condenser. The source of the hydrogen leak was determined earlier to be a cracked weld that could not be repaired on line. The main generator must be purged in order to repair the weld.
"This is reportable under 10 CFR 50.72(b)(2)(iv)(B) and (b)(3)(iv)(A)."
All control rods fully inserted. There are no known Steam Generator tube leaks. The licensee notified the NRC Resident Inspector.