Event Notification Report for July 06, 2015
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/05/2015 - 07/06/2015
Agreement State
Event Number: 51203
Rep Org: TEXAS DEPT OF STATE HEALTH SERVICES
Licensee: ZILKHA BIOMASS CROCKETT
Region: 4
City: CROCKETT State: TX
County:
License #: 06381
Agreement: Y
Docket:
NRC Notified By: ARTHUR TUCKER
HQ OPS Officer: VINCE KLCO
Licensee: ZILKHA BIOMASS CROCKETT
Region: 4
City: CROCKETT State: TX
County:
License #: 06381
Agreement: Y
Docket:
NRC Notified By: ARTHUR TUCKER
HQ OPS Officer: VINCE KLCO
Notification Date: 07/07/2015
Notification Time: 16:20 [ET]
Event Date: 07/06/2015
Event Time: 00:00 [CDT]
Last Update Date: 07/07/2015
Notification Time: 16:20 [ET]
Event Date: 07/06/2015
Event Time: 00:00 [CDT]
Last Update Date: 07/07/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
MARK HAIRE (R4DO)
NMSS_EVENTS_NOTIFIC (EMAI)
MARK HAIRE (R4DO)
NMSS_EVENTS_NOTIFIC (EMAI)
AGREEMENT STATE REPORT - STUCK OPEN SHUTTER
The following information was received from the State of Texas by email:
"On July 7, 2015, the Agency [Texas Department of State Health Services-Radiation Branch] was notified by the licensee's radiation safety officer (RSO) that the shutter on a Ronan GS-400 level gauge containing a 50 millicurie cesium - 137 source was stuck in the open position. The stuck shutter was discovered during the start up of a system component. Open is the normal position for the shutter. The gauge does not possess an exposure risk to any individuals. The manufacturer has been contacted and will replace the gauge. Additional information on this event will be provided as it is received in accordance with SA-300."
Texas Incident: I-9324
The following information was received from the State of Texas by email:
"On July 7, 2015, the Agency [Texas Department of State Health Services-Radiation Branch] was notified by the licensee's radiation safety officer (RSO) that the shutter on a Ronan GS-400 level gauge containing a 50 millicurie cesium - 137 source was stuck in the open position. The stuck shutter was discovered during the start up of a system component. Open is the normal position for the shutter. The gauge does not possess an exposure risk to any individuals. The manufacturer has been contacted and will replace the gauge. Additional information on this event will be provided as it is received in accordance with SA-300."
Texas Incident: I-9324
Power Reactor
Event Number: 51201
Facility: COLUMBIA GENERATING STATION
Region: 4 State: WA
Unit: [2] [] []
RX Type: [2] GE-5
NRC Notified By: DAVID PORTER
HQ OPS Officer: JEFF HERRERA
Region: 4 State: WA
Unit: [2] [] []
RX Type: [2] GE-5
NRC Notified By: DAVID PORTER
HQ OPS Officer: JEFF HERRERA
Notification Date: 07/06/2015
Notification Time: 20:41 [ET]
Event Date: 07/06/2015
Event Time: 14:20 [PDT]
Last Update Date: 07/06/2015
Notification Time: 20:41 [ET]
Event Date: 07/06/2015
Event Time: 14:20 [PDT]
Last Update Date: 07/06/2015
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION
Person (Organization):
MARK HAIRE (R4DO)
MARK HAIRE (R4DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 64 | Power Operation | 64 | Power Operation |
POSTULATED MULTIPLE SPURIOUS OPERATIONS SCENARIO THAT COULD ADVERSELY IMPACT POST-FIRE SAFE SHUTDOWN
"A recent review of Fire Protection and Post Fire Safe Shutdown (PFSS) Programs at Columbia Generating Station (CGS) identified a potential unanalyzed condition with Multiple Spurious Operation (MSO) Scenario 2x.
"Review of the circuit design for High Pressure Core Spray (HPCS) HPCS-V-10, HPCS-V-11 and HPCS-V-15 identified that fire-induced circuit failure (hot shorts) on the OPEN function control circuits for each valve would create the flow path to potentially drain inventory from the suppression pool (SP). The normal operation of HPCS-P-3 (keep-fill pump) would allow additional inventory from the SP to be transferred to the CSTs [Condensate Storage Tank]. If a fourth hot short is postulated, HPCS-P-1 would transfer inventory from the SP to the CST at a much faster rate.
"HPCS-V-11 was deactivated on 6/12/2015 due to a maintenance repair issue and will be left in the fully closed position. This plant alignment resolves current concern for MSO scenario 2x as fire-induced circuit damage cannot cause spurious opening of HPCS-V-11. However, with an incomplete analysis for MSO scenario 2x, compliance with PFSS MSO requirements would have been challenged from the completion of the MSO project (October 2012) up to June 2015.
"CGS is reporting this event as an unanalyzed condition in conformance with 10 CFR 50.72(b)(3)(ii)(B). Further analyses are being implemented to confirm the condition and to develop appropriate remedial actions."
The licensee will notify the NRC Resident Inspector.
"A recent review of Fire Protection and Post Fire Safe Shutdown (PFSS) Programs at Columbia Generating Station (CGS) identified a potential unanalyzed condition with Multiple Spurious Operation (MSO) Scenario 2x.
"Review of the circuit design for High Pressure Core Spray (HPCS) HPCS-V-10, HPCS-V-11 and HPCS-V-15 identified that fire-induced circuit failure (hot shorts) on the OPEN function control circuits for each valve would create the flow path to potentially drain inventory from the suppression pool (SP). The normal operation of HPCS-P-3 (keep-fill pump) would allow additional inventory from the SP to be transferred to the CSTs [Condensate Storage Tank]. If a fourth hot short is postulated, HPCS-P-1 would transfer inventory from the SP to the CST at a much faster rate.
"HPCS-V-11 was deactivated on 6/12/2015 due to a maintenance repair issue and will be left in the fully closed position. This plant alignment resolves current concern for MSO scenario 2x as fire-induced circuit damage cannot cause spurious opening of HPCS-V-11. However, with an incomplete analysis for MSO scenario 2x, compliance with PFSS MSO requirements would have been challenged from the completion of the MSO project (October 2012) up to June 2015.
"CGS is reporting this event as an unanalyzed condition in conformance with 10 CFR 50.72(b)(3)(ii)(B). Further analyses are being implemented to confirm the condition and to develop appropriate remedial actions."
The licensee will notify the NRC Resident Inspector.