Event Notification Report for January 09, 2005
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
01/08/2005 - 01/09/2005
Power Reactor
Event Number: 41319
Facility: PALISADES
Region: 3 State: MI
Unit: [1] [] []
RX Type: [1] CE
NRC Notified By: DAVID VANDEWALLE
HQ OPS Officer: JEFF ROTTON
Region: 3 State: MI
Unit: [1] [] []
RX Type: [1] CE
NRC Notified By: DAVID VANDEWALLE
HQ OPS Officer: JEFF ROTTON
Notification Date: 01/09/2005
Notification Time: 13:42 [ET]
Event Date: 01/09/2005
Event Time: 11:27 [EST]
Last Update Date: 01/09/2005
Notification Time: 13:42 [ET]
Event Date: 01/09/2005
Event Time: 11:27 [EST]
Last Update Date: 01/09/2005
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):
SONIA BURGESS (R3)
SONIA BURGESS (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | M/R | Y | 75 | Power Operation | 0 | Hot Standby |
MANUAL REACTOR TRIP DUE TO LOWERING MAIN CONDENSER VACUUM
"The Palisades reactor was manually tripped from approximately 75% power at 1127 hours EST due to lowering main condenser vacuum. Prior to the reactor trip, power was lowered from 100% to 75% in accordance with off-normal procedures in an effort to restore condenser vacuum. The reason for the loss of condenser vacuum is not understood and is being investigated. At 1135 hours an automatic actuation of the auxiliary feedwater system occurred, as designed, to maintain steam generator levels. The atmospheric steam dump valves opened per design on reactor trip, however one dump valve did not fully re-close until instrument air was manually isolated to it. Reactor decay heat is being removed via steaming through the turbine bypass valve to the main condenser. Reportable under 10CFR50.72(b)(2)(iv)(B) and (b)(3)(iv)(A)."
After the reactor trip, Main Condenser vacuum rose to 25 inches - sufficient for using the Turbine Bypass valves for removing decay heat. All rods inserted on the manual reactor trip. The electric grid is stable.
Licensee notified NRC Resident Inspector.
"The Palisades reactor was manually tripped from approximately 75% power at 1127 hours EST due to lowering main condenser vacuum. Prior to the reactor trip, power was lowered from 100% to 75% in accordance with off-normal procedures in an effort to restore condenser vacuum. The reason for the loss of condenser vacuum is not understood and is being investigated. At 1135 hours an automatic actuation of the auxiliary feedwater system occurred, as designed, to maintain steam generator levels. The atmospheric steam dump valves opened per design on reactor trip, however one dump valve did not fully re-close until instrument air was manually isolated to it. Reactor decay heat is being removed via steaming through the turbine bypass valve to the main condenser. Reportable under 10CFR50.72(b)(2)(iv)(B) and (b)(3)(iv)(A)."
After the reactor trip, Main Condenser vacuum rose to 25 inches - sufficient for using the Turbine Bypass valves for removing decay heat. All rods inserted on the manual reactor trip. The electric grid is stable.
Licensee notified NRC Resident Inspector.
Power Reactor
Event Number: 41320
Facility: SAN ONOFRE
Region: 4 State: CA
Unit: [1] [2] [3]
RX Type: [1] W-3-LP,[2] CE,[3] CE
NRC Notified By: CLAY WILLIAMS
HQ OPS Officer: HOWIE CROUCH
Region: 4 State: CA
Unit: [1] [2] [3]
RX Type: [1] W-3-LP,[2] CE,[3] CE
NRC Notified By: CLAY WILLIAMS
HQ OPS Officer: HOWIE CROUCH
Notification Date: 01/10/2005
Notification Time: 00:56 [ET]
Event Date: 01/09/2005
Event Time: 19:45 [PST]
Last Update Date: 01/11/2005
Notification Time: 00:56 [ET]
Event Date: 01/09/2005
Event Time: 19:45 [PST]
Last Update Date: 01/11/2005
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
LINDA SMITH (R4)
LINDA SMITH (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Decommissioned | 0 | Decommissioned |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
| 3 | N | Y | 65 | Power Operation | 65 | Power Operation |
SAN ONOFRE EMERGENCY OPERATIONS (EOF) INACCESSIBLE DUE TO ROAD FLOODING
The following information was received from the licensee via e-mail:
"On January 9, 2005, at about 1945 PST, the access road to the SONGS MESA facilities became flooded after several days of rain. The San Onofre Emergency Operations Facility (EOF) is located at the MESA and because of the flooding, is inaccessible to passenger vehicles. While the EOF itself is operable, in the event of an Emergency at San Onofre, SCE would direct EOF emergency responders to the alternate EOF located in Irvine, California. SCE is reporting this occurrence to the NRC in accordance with 10CFR50.72(b)(3)(xiii).
"At the time of this occurrence, Unit 2 was operating at about 100% power and Unit 3 was operating at about 65% power. SCE will notify the NRC resident inspectors about this occurrence and will provide them with a copy of this report."
* * * UPDATE PROVIDED BY C. WILLIAMS TO JEFF ROTTON AT 1418 EST ON 01/10/05 * * *
"On January 10, 2005 at about 0143 PST, flooding had dissipated sufficiently for one lane to be passable; at 0615 PST, both lanes were passable. In the event of an Emergency at San Onofre, there is no longer a need to redirect emergency responders to the alternate EOF located in Irvine, California. This report is to advise the NRC of this change in EOF access status. Also note that it is continuing to rain at SONGS and this status is subject to change.
"At the time of this report, Unit 2 was operating at about 85% power and Unit 3 was at about 80% power. SCE has informed the NRC resident inspectors and will provide them with a copy of this report."
Notified R4DO (Bywater).
* * * UPDATE PROVIDED BY C. WILLIAMS TO HOWIE CROUCH @ 0425 EST ON 01/11/05 * * *
"On January 11, 2005, at about 0041 PST, the access road to the SONGS MESA facilities again became flooded after several days of rain (reference NRC Operations Log Number 41320). The San Onofre Emergency Operations Facility (EOF) is located at the MESA and because of the flooding, is inaccessible to passenger vehicles. While the EOF itself is operable, in the event of an Emergency at San Onofre, SCE would direct EOF emergency responders to the alternate EOF located in Irvine California. SCE is reporting this occurrence to the NRC in accordance with 10CFR50.72(b)(3)(xiii).
"At the time of this occurrence, Unit 2 was operating at about 85% power and Unit 3 was at about 80% power. SCE will notify the NRC resident inspectors about this occurrence and will provide them with a copy of this report."
Notified R4DO (Bywater).
* * * UPDATE 1430 EST ON 1/11/05 FROM CLAY WILLIAMS TO S. SANDIN * * *
"On January 11, 2005, at 0125 PST, Southern California Edison (SCE) reported that the access road to the SONGS MESA facilities had again flooded after several days of rain and that the SONGS Emergency Operations Facility (EOF) was inaccessible to passenger vehicles (NRC Operations Log Number 41320).
"On January 11, 2005 at about 0535 PST, flooding had dissipated sufficiently for the road to be passable. In the event of an Emergency at San Onofre, there is no longer a need to redirect emergency responders to the alternate EOF located in Irvine California. This report is to advise the NRC of this change in EOF access status.
"At the time of this report, Unit 2 was operating at about 85% power and Unit 3 was at about 81% power. SCE has informed the NRC resident inspectors and will provide them with a copy of this report."
Notified R4DO (Russ Bywater).
The following information was received from the licensee via e-mail:
"On January 9, 2005, at about 1945 PST, the access road to the SONGS MESA facilities became flooded after several days of rain. The San Onofre Emergency Operations Facility (EOF) is located at the MESA and because of the flooding, is inaccessible to passenger vehicles. While the EOF itself is operable, in the event of an Emergency at San Onofre, SCE would direct EOF emergency responders to the alternate EOF located in Irvine, California. SCE is reporting this occurrence to the NRC in accordance with 10CFR50.72(b)(3)(xiii).
"At the time of this occurrence, Unit 2 was operating at about 100% power and Unit 3 was operating at about 65% power. SCE will notify the NRC resident inspectors about this occurrence and will provide them with a copy of this report."
* * * UPDATE PROVIDED BY C. WILLIAMS TO JEFF ROTTON AT 1418 EST ON 01/10/05 * * *
"On January 10, 2005 at about 0143 PST, flooding had dissipated sufficiently for one lane to be passable; at 0615 PST, both lanes were passable. In the event of an Emergency at San Onofre, there is no longer a need to redirect emergency responders to the alternate EOF located in Irvine, California. This report is to advise the NRC of this change in EOF access status. Also note that it is continuing to rain at SONGS and this status is subject to change.
"At the time of this report, Unit 2 was operating at about 85% power and Unit 3 was at about 80% power. SCE has informed the NRC resident inspectors and will provide them with a copy of this report."
Notified R4DO (Bywater).
* * * UPDATE PROVIDED BY C. WILLIAMS TO HOWIE CROUCH @ 0425 EST ON 01/11/05 * * *
"On January 11, 2005, at about 0041 PST, the access road to the SONGS MESA facilities again became flooded after several days of rain (reference NRC Operations Log Number 41320). The San Onofre Emergency Operations Facility (EOF) is located at the MESA and because of the flooding, is inaccessible to passenger vehicles. While the EOF itself is operable, in the event of an Emergency at San Onofre, SCE would direct EOF emergency responders to the alternate EOF located in Irvine California. SCE is reporting this occurrence to the NRC in accordance with 10CFR50.72(b)(3)(xiii).
"At the time of this occurrence, Unit 2 was operating at about 85% power and Unit 3 was at about 80% power. SCE will notify the NRC resident inspectors about this occurrence and will provide them with a copy of this report."
Notified R4DO (Bywater).
* * * UPDATE 1430 EST ON 1/11/05 FROM CLAY WILLIAMS TO S. SANDIN * * *
"On January 11, 2005, at 0125 PST, Southern California Edison (SCE) reported that the access road to the SONGS MESA facilities had again flooded after several days of rain and that the SONGS Emergency Operations Facility (EOF) was inaccessible to passenger vehicles (NRC Operations Log Number 41320).
"On January 11, 2005 at about 0535 PST, flooding had dissipated sufficiently for the road to be passable. In the event of an Emergency at San Onofre, there is no longer a need to redirect emergency responders to the alternate EOF located in Irvine California. This report is to advise the NRC of this change in EOF access status.
"At the time of this report, Unit 2 was operating at about 85% power and Unit 3 was at about 81% power. SCE has informed the NRC resident inspectors and will provide them with a copy of this report."
Notified R4DO (Russ Bywater).