Event Notification Report for November 04, 2020
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
11/03/2020 - 11/04/2020
Agreement State
Event Number: 54985
Rep Org: CALIFORNIA RADIATION CONTROL PRGM
Licensee: Moore Twining Associates, Inc.
Region: 4
City: Sand City State: CA
County:
License #: 8329-27
Agreement: Y
Docket:
NRC Notified By: Arunika Hewadikaram
HQ OPS Officer: Andrew Waugh
Licensee: Moore Twining Associates, Inc.
Region: 4
City: Sand City State: CA
County:
License #: 8329-27
Agreement: Y
Docket:
NRC Notified By: Arunika Hewadikaram
HQ OPS Officer: Andrew Waugh
Notification Date: 11/05/2020
Notification Time: 19:35 [ET]
Event Date: 11/04/2020
Event Time: 00:00 [PST]
Last Update Date: 11/05/2020
Notification Time: 19:35 [ET]
Event Date: 11/04/2020
Event Time: 00:00 [PST]
Last Update Date: 11/05/2020
Emergency Class: Non Emergency
10 CFR Section:
Agreement State
10 CFR Section:
Agreement State
Person (Organization):
PROULX, DAVID (R4DO)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
PROULX, DAVID (R4DO)
NMSS_EVENTS_NOTIFICATION, (EMAIL)
AGREEMENT STATE REPORT - DAMAGED GAUGE
The following is a summary of information was received via email:
On 11/4/20, one of the licensee's moisture density gauges was damaged at a job site in Chualar, California. The gauge was not in use and the sources were in the shielded position when it was run over by a scraper. The area was immediately secured and the scraper was taken out of service. The source rod was broken off at the top of the shielding and the outer casing of the gauge was heavily damaged. On the day of the incident, gauge was transported to licensee's storage facility. On 11/5/20, the gauge was taken to InstroTek for disposal. Leak tests performed at InstroTek were negative for any contamination.
The gauge was a CPN MC3-Elite (S/N: 800338) containing 10 mCi Cs-137 and 50 mCi of Am-241.
California 5010 Number: 110420
The following is a summary of information was received via email:
On 11/4/20, one of the licensee's moisture density gauges was damaged at a job site in Chualar, California. The gauge was not in use and the sources were in the shielded position when it was run over by a scraper. The area was immediately secured and the scraper was taken out of service. The source rod was broken off at the top of the shielding and the outer casing of the gauge was heavily damaged. On the day of the incident, gauge was transported to licensee's storage facility. On 11/5/20, the gauge was taken to InstroTek for disposal. Leak tests performed at InstroTek were negative for any contamination.
The gauge was a CPN MC3-Elite (S/N: 800338) containing 10 mCi Cs-137 and 50 mCi of Am-241.
California 5010 Number: 110420
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 54983
Facility: Browns Ferry
Region: 2 State: AL
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4,[3] GE-4
NRC Notified By: Michael Millsap
HQ OPS Officer: Bethany Cecere
Region: 2 State: AL
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4,[3] GE-4
NRC Notified By: Michael Millsap
HQ OPS Officer: Bethany Cecere
Notification Date: 11/05/2020
Notification Time: 06:32 [ET]
Event Date: 11/04/2020
Event Time: 21:50 [CST]
Last Update Date: 12/29/2020
Notification Time: 06:32 [ET]
Event Date: 11/04/2020
Event Time: 21:50 [CST]
Last Update Date: 12/29/2020
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
10 CFR Section:
50.72(b)(3)(v)(D) - Accident Mitigation
Person (Organization):
MARK MILLER (R2DO)
MARK MILLER (R2DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 17 | Power Operation | 16 | Power Operation |
EN Revision Imported Date: 12/30/2020
EN Revision Text: HIGH PRESSURE COOLANT INJECTION INOPERABLE
"At 2150 CST on 11/04/2020, it was discovered that Unit 1 High Pressure Coolant Injection System (HPCI) was INOPERABLE; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v), as an event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident.
"During performance of 1-SR-3.5.1.7, HPCI Main and Booster Pump Set Developed Head and Flow Rate Test at Rated Reactor Pressure, Unit 1 HPCI was manually tripped by the control room operator due to local report of excessive shaking of the cooling water supply from the booster pump line.
"There was no impact to the safety of the public or plant personnel. The NRC Resident Inspector has been notified.
"CR 1650042 documents this condition in the Corrective Action Program."
The Unit is in a 14-day LCO 3.5.1(c). The RCIC System is operable.
* * * RETRACTION FROM MARK ACKER TO HOWIE CROUCH AT 1607 EST ON 12/29/2020 * * *
"ENS Event number 54983, made on 11/05/2020 is being retracted. NRC notification 54983 was made to ensure that the Eight-Hour Non-Emergency reporting requirements of 10 CFR 50.72 were met when Unit 1 HPCI was manually tripped by the control room operator due to a local report for excessive shaking of the cooling water supply from the booster pump line.
"A subsequent engineering evaluation concluded on 11/06/2020 there was reasonable assurance of operability with no additional intrusive maintenance performed and that the condition was bounded by a previous evaluation documented in [Condition Report] CR 1347736. As such, the circumstances discussed in the report did not result in any condition that at the time of discovery could have prevented the fulfillment of the safety function of structures of the system that are needed to mitigate the consequences of an accident. Therefore, this event is not reportable under 10 CFR 50.72(b)(3)(v).
"TVA's evaluation of this event is documented in the corrective action program.
"The licensee has notified the NRC Resident Inspector."
Notified R2DO (Miller).
EN Revision Text: HIGH PRESSURE COOLANT INJECTION INOPERABLE
"At 2150 CST on 11/04/2020, it was discovered that Unit 1 High Pressure Coolant Injection System (HPCI) was INOPERABLE; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v), as an event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident.
"During performance of 1-SR-3.5.1.7, HPCI Main and Booster Pump Set Developed Head and Flow Rate Test at Rated Reactor Pressure, Unit 1 HPCI was manually tripped by the control room operator due to local report of excessive shaking of the cooling water supply from the booster pump line.
"There was no impact to the safety of the public or plant personnel. The NRC Resident Inspector has been notified.
"CR 1650042 documents this condition in the Corrective Action Program."
The Unit is in a 14-day LCO 3.5.1(c). The RCIC System is operable.
* * * RETRACTION FROM MARK ACKER TO HOWIE CROUCH AT 1607 EST ON 12/29/2020 * * *
"ENS Event number 54983, made on 11/05/2020 is being retracted. NRC notification 54983 was made to ensure that the Eight-Hour Non-Emergency reporting requirements of 10 CFR 50.72 were met when Unit 1 HPCI was manually tripped by the control room operator due to a local report for excessive shaking of the cooling water supply from the booster pump line.
"A subsequent engineering evaluation concluded on 11/06/2020 there was reasonable assurance of operability with no additional intrusive maintenance performed and that the condition was bounded by a previous evaluation documented in [Condition Report] CR 1347736. As such, the circumstances discussed in the report did not result in any condition that at the time of discovery could have prevented the fulfillment of the safety function of structures of the system that are needed to mitigate the consequences of an accident. Therefore, this event is not reportable under 10 CFR 50.72(b)(3)(v).
"TVA's evaluation of this event is documented in the corrective action program.
"The licensee has notified the NRC Resident Inspector."
Notified R2DO (Miller).