Event Notification Report for July 03, 2017
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/02/2017 - 07/03/2017
EVENT NUMBERS
52839
Power Reactor
Event Number: 52839
Facility: OYSTER CREEK
Region: 1 State: NJ
Unit: [1] [] []
RX Type: [1] GE-2
NRC Notified By: JOSH MCGUIRE
HQ OPS Officer: MARK ABRAMOVITZ
Region: 1 State: NJ
Unit: [1] [] []
RX Type: [1] GE-2
NRC Notified By: JOSH MCGUIRE
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 07/03/2017
Notification Time: 12:32 [ET]
Event Date: 07/03/2017
Event Time: 10:15 [EDT]
Last Update Date: 07/03/2017
Notification Time: 12:32 [ET]
Event Date: 07/03/2017
Event Time: 10:15 [EDT]
Last Update Date: 07/03/2017
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
RAY POWELL (R1DO)
RAY POWELL (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | M/R | Y | 42 | Power Operation | 0 | Hot Shutdown |
MANUAL REACTOR SCRAM ON LOW CONDENSER VACUUM
"At 1015 [EDT] a manual reactor scram was inserted due to degrading main condenser vacuum. All rods inserted into the core as expected and all systems functioned as expected during the scram.
"This event is reportable within 4 hours per 10 CFR 50.72(b)(2)(iv)(B) 'any event or condition that results in actuation of the Reactor Protection System (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation.'
"At 1033 [EDT] an automatic reactor scram occurred on low reactor water level. Due to the previous manual reactor scram, all rods were [already] inserted.
"This event is reportable within 8 hours per 10 CFR 50.72(b)(3)(iv)(A) 'any event or condition that results in valid actuation of any of the systems listed in paragraph (b)(3)(iv)(B) of this section, except when the actuation results from and is part of a preplanned sequence during testing or reactor operation. (1) Reactor protection system (RPS) including : Reactor scram and reactor trip.'"
Decay heat is being removed using main feedwater and the turbine bypass valves.
The licensee notified the NRC Resident Inspector.
This event was characterized as a "configuration control event" where a valve misposition allowed the offgas line to flood.
"At 1015 [EDT] a manual reactor scram was inserted due to degrading main condenser vacuum. All rods inserted into the core as expected and all systems functioned as expected during the scram.
"This event is reportable within 4 hours per 10 CFR 50.72(b)(2)(iv)(B) 'any event or condition that results in actuation of the Reactor Protection System (RPS) when the reactor is critical except when the actuation results from and is part of a pre-planned sequence during testing or reactor operation.'
"At 1033 [EDT] an automatic reactor scram occurred on low reactor water level. Due to the previous manual reactor scram, all rods were [already] inserted.
"This event is reportable within 8 hours per 10 CFR 50.72(b)(3)(iv)(A) 'any event or condition that results in valid actuation of any of the systems listed in paragraph (b)(3)(iv)(B) of this section, except when the actuation results from and is part of a preplanned sequence during testing or reactor operation. (1) Reactor protection system (RPS) including : Reactor scram and reactor trip.'"
Decay heat is being removed using main feedwater and the turbine bypass valves.
The licensee notified the NRC Resident Inspector.
This event was characterized as a "configuration control event" where a valve misposition allowed the offgas line to flood.