Event Notification Report for April 16, 2017
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/15/2017 - 04/16/2017
EVENT NUMBERS
52805
Power Reactor
Event Number: 52805
Facility: SALEM
Region: 1 State: NJ
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: MATTHEW MOG
HQ OPS Officer: JEFF HERRERA
Region: 1 State: NJ
Unit: [] [2] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: MATTHEW MOG
HQ OPS Officer: JEFF HERRERA
Notification Date: 06/15/2017
Notification Time: 11:32 [ET]
Event Date: 04/16/2017
Event Time: 10:53 [EDT]
Last Update Date: 06/15/2017
Notification Time: 11:32 [ET]
Event Date: 04/16/2017
Event Time: 10:53 [EDT]
Last Update Date: 06/15/2017
Emergency Class: NON EMERGENCY
10 CFR Section:
50.73(a)(1) - INVALID SPECIF SYSTEM ACTUATION
10 CFR Section:
50.73(a)(1) - INVALID SPECIF SYSTEM ACTUATION
Person (Organization):
MEL GRAY (R1DO)
MEL GRAY (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | N | 0 | Cold Shutdown | 0 | Cold Shutdown |
INVALID EDG ACTUATION DURING SURVEILLANCE TESTING
"This is to report the Salem Unit 2, 2C Emergency Diesel Generator (EDG) actuation due to an invalid signal.
"This report is being made per paragraphs 10CFR50.73(a)(1) and 10CFR50.73(a)(2)(iv)(A) to address the invalid actuation of the 2C EDG on April 16, 2017, while performing the 2C Safeguards Equipment Controller (SEC) Mode OPS Surveillance test.
"Plant conditions: Salem Unit 2 was in mode 5 at the time of the invalid actuation.
"On April 16, 2017, at approximately 1053 [EDT] while performing Solid State Protection System (SSPS) testing of the 2C SEC, the 2C Emergency Diesel Generator (EDG) output breaker was manually opened per the associated procedure step. The EDG output breaker unexpectedly reclosed and the 2C 4kV vital bus loaded onto the EDG in SEC Mode 2.
"The cause of the 2C EDG output breaker reclosure and 2C 4kV Vital bus loading during testing was determined to be two faulty input block switches in the 2C SEC. When Step 5.2.27 of the test procedure was performed, the 2C SEC 'input block' switches failed to block a 'blackout' actuation signal. This resulted in the breaker reclosure and loading of the 2C Vital Bus onto the EDG. Trouble shooting identified that the two failed switches exhibited high resistance across the switch contacts which is indicative of being in a 'fail to block' (the input signal) condition.
"The licensee has notified the NRC Resident Inspector."
The licensee will also notify the States of New Jersey and Delaware.
"This is to report the Salem Unit 2, 2C Emergency Diesel Generator (EDG) actuation due to an invalid signal.
"This report is being made per paragraphs 10CFR50.73(a)(1) and 10CFR50.73(a)(2)(iv)(A) to address the invalid actuation of the 2C EDG on April 16, 2017, while performing the 2C Safeguards Equipment Controller (SEC) Mode OPS Surveillance test.
"Plant conditions: Salem Unit 2 was in mode 5 at the time of the invalid actuation.
"On April 16, 2017, at approximately 1053 [EDT] while performing Solid State Protection System (SSPS) testing of the 2C SEC, the 2C Emergency Diesel Generator (EDG) output breaker was manually opened per the associated procedure step. The EDG output breaker unexpectedly reclosed and the 2C 4kV vital bus loaded onto the EDG in SEC Mode 2.
"The cause of the 2C EDG output breaker reclosure and 2C 4kV Vital bus loading during testing was determined to be two faulty input block switches in the 2C SEC. When Step 5.2.27 of the test procedure was performed, the 2C SEC 'input block' switches failed to block a 'blackout' actuation signal. This resulted in the breaker reclosure and loading of the 2C Vital Bus onto the EDG. Trouble shooting identified that the two failed switches exhibited high resistance across the switch contacts which is indicative of being in a 'fail to block' (the input signal) condition.
"The licensee has notified the NRC Resident Inspector."
The licensee will also notify the States of New Jersey and Delaware.