Event Notification Report for November 12, 2002
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
11/11/2002 - 11/12/2002
Power Reactor
Event Number: 39364
Facility: SALEM
Region: 1 State: NJ
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Joe Sullivan
HQ OPS Officer: ERIC THOMAS
Region: 1 State: NJ
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: Joe Sullivan
HQ OPS Officer: ERIC THOMAS
Notification Date: 11/12/2002
Notification Time: 13:01 [ET]
Event Date: 11/12/2002
Event Time: 09:48 [EST]
Last Update Date: 11/12/2002
Notification Time: 13:01 [ET]
Event Date: 11/12/2002
Event Time: 09:48 [EST]
Last Update Date: 11/12/2002
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Person (Organization):
HAROLD GRAY (R1)
HAROLD GRAY (R1)
| 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 |
MANUAL REACTOR TRIP OF SALEM UNIT 1 DUE TO LOW S/G WATER LEVEL CAUSED BY FEED PUMP RUNBACK
"This 4-hour notification is being made to report that Salem Unit 1 reactor was manually tripped at 0948 [EST] (RPS actuation). The trip was initiated due to low steam generator level (~16% narrow range). The low SG level appears to have been caused due to a runback of the 11 steam generator feed pump (SGFP) to idle. The cause of the runback has not been determined at this time. As a result of the runback, the level in steam generators dropped and the operators initiated a main turbine runback and tripped 11 SGFP manually. When operators observed the steam generators approaching the automatic reactor trip setpoint (14%), a manual reactor trip was initiated.
"11, 12 & 13 auxiliary feed water pumps auto started after the trip due to valid steam generator low level, as expected on a unit trip. Main feedwater to the steam generators was isolated due to the "feed water interlock" which is expected on a normal trip. Additionally the ATWS mitigation system (AMSAC) did actuate post trip due to low steam generator levels but all auxiliary feed water pumps were already running prior to the actuation.
"Salem Unit-1 is currently in MODE 3 [Hot Standby]. Reactor coolant system temperature is 547 [degrees] F with pressure at 2235 PSIG. Unit 1 has no shutdown tech. spec. action statements in effect. Major equipment out of service for planned maintenance includes the 16 service water pump which is expected back later today and Salem Unit-3 which is scheduled to be available on 11/15/02.
"There were no personnel injuries or radiological occurrences associated with this event."
Additionally, the licensee indicated that while the exact cause of the runback is not known, there was ongoing work on the limit switches for the 11 SGFP at the time of the runback, and there was some arcing in the switches.
The licensee notified the resident inspector of this event.
"This 4-hour notification is being made to report that Salem Unit 1 reactor was manually tripped at 0948 [EST] (RPS actuation). The trip was initiated due to low steam generator level (~16% narrow range). The low SG level appears to have been caused due to a runback of the 11 steam generator feed pump (SGFP) to idle. The cause of the runback has not been determined at this time. As a result of the runback, the level in steam generators dropped and the operators initiated a main turbine runback and tripped 11 SGFP manually. When operators observed the steam generators approaching the automatic reactor trip setpoint (14%), a manual reactor trip was initiated.
"11, 12 & 13 auxiliary feed water pumps auto started after the trip due to valid steam generator low level, as expected on a unit trip. Main feedwater to the steam generators was isolated due to the "feed water interlock" which is expected on a normal trip. Additionally the ATWS mitigation system (AMSAC) did actuate post trip due to low steam generator levels but all auxiliary feed water pumps were already running prior to the actuation.
"Salem Unit-1 is currently in MODE 3 [Hot Standby]. Reactor coolant system temperature is 547 [degrees] F with pressure at 2235 PSIG. Unit 1 has no shutdown tech. spec. action statements in effect. Major equipment out of service for planned maintenance includes the 16 service water pump which is expected back later today and Salem Unit-3 which is scheduled to be available on 11/15/02.
"There were no personnel injuries or radiological occurrences associated with this event."
Additionally, the licensee indicated that while the exact cause of the runback is not known, there was ongoing work on the limit switches for the 11 SGFP at the time of the runback, and there was some arcing in the switches.
The licensee notified the resident inspector of this event.
Power Reactor
Event Number: 39365
Facility: PALO VERDE
Region: 4 State: AZ
Unit: [1] [2] [3]
RX Type: [1] CE,[2] CE,[3] CE
NRC Notified By: DON STRAKA
HQ OPS Officer: ERIC THOMAS
Region: 4 State: AZ
Unit: [1] [2] [3]
RX Type: [1] CE,[2] CE,[3] CE
NRC Notified By: DON STRAKA
HQ OPS Officer: ERIC THOMAS
Notification Date: 11/12/2002
Notification Time: 16:12 [ET]
Event Date: 11/12/2002
Event Time: 12:30 [MST]
Last Update Date: 11/12/2002
Notification Time: 16:12 [ET]
Event Date: 11/12/2002
Event Time: 12:30 [MST]
Last Update Date: 11/12/2002
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
Person (Organization):
CHUCK CAIN (R4)
CHUCK CAIN (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Startup | 0 | Startup |
| 2 | N | Y | 99 | Power Operation | 99 | Power Operation |
| 3 | N | Y | 99 | Power Operation | 99 | Power Operation |
UNINTENTIONAL RELEASE OF REVERSE OSMOSIS PRODUCT WATER
"The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.
"On November 12, 2002, APS reported to the Arizona Department of Environmental Quality (ADEQ) the unintentional release of less than 500 gallons of reverse osmosis (RO) product water to sedimentation basin #2 that occurred on October 19, 2002 during a storm. RO product water is make-up water to the site drinking water system and meets all aquifer water quality standards. The Ground Water Quality Protection Permit does not authorize such a release.
"This report to the ADEQ is in the form of a letter sent via certified mail.
"No news release is anticipated."
The licensee notified the resident inspector of this event.
"The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.
"On November 12, 2002, APS reported to the Arizona Department of Environmental Quality (ADEQ) the unintentional release of less than 500 gallons of reverse osmosis (RO) product water to sedimentation basin #2 that occurred on October 19, 2002 during a storm. RO product water is make-up water to the site drinking water system and meets all aquifer water quality standards. The Ground Water Quality Protection Permit does not authorize such a release.
"This report to the ADEQ is in the form of a letter sent via certified mail.
"No news release is anticipated."
The licensee notified the resident inspector of this event.