Event Notification Report for March 25, 2014
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
03/24/2014 - 03/25/2014
Power Reactor
Event Number: 49958
Facility: CLINTON
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: DAN HUNT
HQ OPS Officer: DONALD NORWOOD
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: DAN HUNT
HQ OPS Officer: DONALD NORWOOD
Notification Date: 03/25/2014
Notification Time: 22:44 [ET]
Event Date: 03/25/2014
Event Time: 19:42 [CDT]
Last Update Date: 03/25/2014
Notification Time: 22:44 [ET]
Event Date: 03/25/2014
Event Time: 19:42 [CDT]
Last Update Date: 03/25/2014
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):
BILLY DICKSON (R3DO)
BILLY DICKSON (R3DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | M/R | Y | 46 | Power Operation | 0 | Hot Shutdown |
MANUAL REACTOR SCRAM DUE TO LOSS OF CONDENSER VACUUM
"The plant was stable at 85 percent power when off-gas flow started lowering. The operating crew entered the loss of vacuum off-normal procedure and commenced an emergency power reduction to attempt to slow/halt the loss of vacuum while attempting various prescribed actions in the off-normal procedure. When vacuum reached 24 in. Hg, a rapid plant shutdown was performed as prescribed in the off-normal procedure. Power was at 46 percent when a rapid plant shutdown was commenced with the mode switch placed in shutdown at 1942 CDT. All control rods fully inserted on the scram, no emergency core cooling system injected or was required, no safety/relief valve(s) lifted and all systems responded as expected on the scram. The plant will remain in mode 3 with normal makeup from the feedwater system and pressure control on the turbine bypass valves with the main condenser available as a heat sink. All vital and non-vital electrical busses are powered from reserve off-site sources and no emergency diesel generators started on the scram. The cause of the loss of vacuum is under investigation."
The licensee notified the NRC Resident Inspector.
"The plant was stable at 85 percent power when off-gas flow started lowering. The operating crew entered the loss of vacuum off-normal procedure and commenced an emergency power reduction to attempt to slow/halt the loss of vacuum while attempting various prescribed actions in the off-normal procedure. When vacuum reached 24 in. Hg, a rapid plant shutdown was performed as prescribed in the off-normal procedure. Power was at 46 percent when a rapid plant shutdown was commenced with the mode switch placed in shutdown at 1942 CDT. All control rods fully inserted on the scram, no emergency core cooling system injected or was required, no safety/relief valve(s) lifted and all systems responded as expected on the scram. The plant will remain in mode 3 with normal makeup from the feedwater system and pressure control on the turbine bypass valves with the main condenser available as a heat sink. All vital and non-vital electrical busses are powered from reserve off-site sources and no emergency diesel generators started on the scram. The cause of the loss of vacuum is under investigation."
The licensee notified the NRC Resident Inspector.
Part 21
Event Number: 50013
Rep Org: UNITED CONTROLS INTERNATIONAL
Licensee: UNITED CONTROLS INTERNATIONAL
Region: 1
City: NORCROSS State: GA
County:
License #:
Agreement: Y
Docket:
NRC Notified By: KORINA LOOFT
HQ OPS Officer: STEVE SANDIN
Licensee: UNITED CONTROLS INTERNATIONAL
Region: 1
City: NORCROSS State: GA
County:
License #:
Agreement: Y
Docket:
NRC Notified By: KORINA LOOFT
HQ OPS Officer: STEVE SANDIN
Notification Date: 04/09/2014
Notification Time: 13:37 [ET]
Event Date: 03/25/2014
Event Time: 00:00 [EDT]
Last Update Date: 04/09/2014
Notification Time: 13:37 [ET]
Event Date: 03/25/2014
Event Time: 00:00 [EDT]
Last Update Date: 04/09/2014
Emergency Class: NON EMERGENCY
10 CFR Section:
21.21(a)(2) - INTERIM EVAL OF DEVIATION
10 CFR Section:
21.21(a)(2) - INTERIM EVAL OF DEVIATION
Person (Organization):
RAY POWELL (R1DO)
MALCOLM WIDMANN (R2DO)
JAMES DRAKE (R4DO)
NRR PART 21 GROUP (EMAI)
RAY POWELL (R1DO)
MALCOLM WIDMANN (R2DO)
JAMES DRAKE (R4DO)
NRR PART 21 GROUP (EMAI)
PART 21 - POTENTIAL DEFECT IN GENERAL ELECTRIC SB1 SWITCHES AND HEA RELAYS
The following is an excerpt from a fax received from United Controls International (UCI):
"The purpose of this letter is to provide the NRC with a report in general conformity of the requirements of 10CFR Part 21.21. On March 19, 2013, United Controls Issued an Interim letter regarding a discovered manufacturing change in the contact assembly of General Electric SBM series switches. Since 2009, the manufacturing process of the contact assembly of the SBM switch contacts has changed to have the whole assembly (contact holder and contact tip) tin plated. This was discovered while investigating an SBM switch that failed at a customer site due to high contact resistance across closed contacts. The finding that there was a manufacturing process change in the SBM switches lead to further discussions and evaluations regarding equipment of similar design. General Electric SB1 series switches and HEA series relays use the same contact arrangement design as the SBM series switches. The contact assemblies of the SB1 switches and HEA relays are subject to the same tin plating process of the contact assembly as previously reported on the SBM series switches.
"At this time, UCI is unable to evaluate if this manufacturing change may have an adverse effect on the capability of the General Electric SB1 switches and GE HEA relays to perform in their intended safety related application.
"UCI will notify the affected Utilities to our findings."
The affected Part Number, Utility, Order Number and Quantity is listed below:
Part Number 12HEA61B23SX2; Utility CFE; Order 700372018; Quantity 3
Part Number 12HEA61C236X2; Utility FPL Turkey Point; Order 02260642-34; Quantity 2
Part Number 12HEA61C237; Utility OPPD; Order 180520; Quantity 4
Part Number 12HEA61C238X2; Utility OPPD; Order 180520; Quantity 3
Part Number 12HEA61C237; Utility OPPD; Order 185929; Quantity 2
Part Number 12HEA61C237X2; Utility OPPD; Order 188314; Quantity 2
Part Number 12HEA63C239X2; Utility FPL St. Lucie; Order 02260642-41; Quantity 8
Part Number HEA61C234X2; Utility Antung; Order PP100204; Quantity 2
Part Number HEA61C244X2; Utility OPPD; Order 179664; Quantity 5
Part Number HEA61C241X2; Utility OPPD; Order 179664; Quantity 2
Part Number HEA63C239X2; Utility FPL St. Lucie; Order 02260642-103; Quantity 3
Part Number 12HEA61C238X2; Utility OPPD; Order 194686; Quantity 4
Part Number 16SB1BB339STS2P; Utility Duke Oconee; Order 156606; Quantity 11
Part Number 165BlFB2C85SWM2Y; Utility Nextera Seabrook; Order 2259825-3; Quantity 1
Part Number 16SB1LB2C01LSM2P; Utility CFE; Order 700327408; Quantity 3
Utility CFE is the Comisi¢n Federal de Electricidad (Mexico) and Utility Antung is located in Taiwan.
"If you have any questions or wish to discuss this matter or this report, please contact:
Jim Garrison
Engineering Manager, Seismic and Equipment Qualification
JGarrison@unitedcontrols.com
770-496-1406 X 103."
The 10CFR Part 21.21 received on March 19, 2014 is EN #49940.
The following is an excerpt from a fax received from United Controls International (UCI):
"The purpose of this letter is to provide the NRC with a report in general conformity of the requirements of 10CFR Part 21.21. On March 19, 2013, United Controls Issued an Interim letter regarding a discovered manufacturing change in the contact assembly of General Electric SBM series switches. Since 2009, the manufacturing process of the contact assembly of the SBM switch contacts has changed to have the whole assembly (contact holder and contact tip) tin plated. This was discovered while investigating an SBM switch that failed at a customer site due to high contact resistance across closed contacts. The finding that there was a manufacturing process change in the SBM switches lead to further discussions and evaluations regarding equipment of similar design. General Electric SB1 series switches and HEA series relays use the same contact arrangement design as the SBM series switches. The contact assemblies of the SB1 switches and HEA relays are subject to the same tin plating process of the contact assembly as previously reported on the SBM series switches.
"At this time, UCI is unable to evaluate if this manufacturing change may have an adverse effect on the capability of the General Electric SB1 switches and GE HEA relays to perform in their intended safety related application.
"UCI will notify the affected Utilities to our findings."
The affected Part Number, Utility, Order Number and Quantity is listed below:
Part Number 12HEA61B23SX2; Utility CFE; Order 700372018; Quantity 3
Part Number 12HEA61C236X2; Utility FPL Turkey Point; Order 02260642-34; Quantity 2
Part Number 12HEA61C237; Utility OPPD; Order 180520; Quantity 4
Part Number 12HEA61C238X2; Utility OPPD; Order 180520; Quantity 3
Part Number 12HEA61C237; Utility OPPD; Order 185929; Quantity 2
Part Number 12HEA61C237X2; Utility OPPD; Order 188314; Quantity 2
Part Number 12HEA63C239X2; Utility FPL St. Lucie; Order 02260642-41; Quantity 8
Part Number HEA61C234X2; Utility Antung; Order PP100204; Quantity 2
Part Number HEA61C244X2; Utility OPPD; Order 179664; Quantity 5
Part Number HEA61C241X2; Utility OPPD; Order 179664; Quantity 2
Part Number HEA63C239X2; Utility FPL St. Lucie; Order 02260642-103; Quantity 3
Part Number 12HEA61C238X2; Utility OPPD; Order 194686; Quantity 4
Part Number 16SB1BB339STS2P; Utility Duke Oconee; Order 156606; Quantity 11
Part Number 165BlFB2C85SWM2Y; Utility Nextera Seabrook; Order 2259825-3; Quantity 1
Part Number 16SB1LB2C01LSM2P; Utility CFE; Order 700327408; Quantity 3
Utility CFE is the Comisi¢n Federal de Electricidad (Mexico) and Utility Antung is located in Taiwan.
"If you have any questions or wish to discuss this matter or this report, please contact:
Jim Garrison
Engineering Manager, Seismic and Equipment Qualification
JGarrison@unitedcontrols.com
770-496-1406 X 103."
The 10CFR Part 21.21 received on March 19, 2014 is EN #49940.