Event Notification Report for October 11, 2016
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
10/10/2016 - 10/11/2016
EVENT NUMBERS
52294
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 52294
Facility: SALEM
Region: 1 State: NJ
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: MATT MOG
HQ OPS Officer: HOWIE CROUCH
Region: 1 State: NJ
Unit: [1] [] []
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: MATT MOG
HQ OPS Officer: HOWIE CROUCH
Notification Date: 10/11/2016
Notification Time: 16:48 [ET]
Event Date: 10/11/2016
Event Time: 09:38 [EDT]
Last Update Date: 12/12/2016
Notification Time: 16:48 [ET]
Event Date: 10/11/2016
Event Time: 09:38 [EDT]
Last Update Date: 12/12/2016
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):
FRANK ARNER (R1DO)
FRANK ARNER (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
UNANALYZED CONDITION DUE TO FAILURE OF A WATERTIGHT DOOR TO CLOSE
"At 0938 [EDT], the watertight door in the Unit 1 Inboard Service Water Penetration Area was unable to be closed. The watertight door serves as a High Energy Line Break (HELB) and Medium Energy Line Break (MELB) barrier between the mechanical penetration room and the service water penetration room. A HELB/MELB event occurring in a room with its barrier door open could adversely affect equipment in an adjacent room. Consequently, a HELB/MELB event could have rendered equipment in the adjacent room inoperable.
"At 1005, station maintenance was able to successfully close and latch the door restoring the barrier.
"This event is being reported under the requirements of 10CFR50.72(b)(3)(ii)(B) as, 'the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety.' An ENS notification is required if an unanalyzed condition occurred within 3 years of the date of discovery even if the event is not on-going at the time of discovery."
The licensee notified Lower Alloways Creek Township and the NRC Resident Inspector.
* * * RETRACTION FROM JOHN OSBORNE TO JOHN SHOEMAKER AT 1545 EST ON 12/12/16 * * *
"The purpose of this notification is to retract event report number 52294 made on 10/11/2016 at 1648 (ET). Previously PSEG reported that Salem Unit 1 was determined to be in an unanalyzed condition due to being unable to close the Unit 1 Inboard Service Water Penetration Area Water Tight Door. The watertight door was reported to serve as a High Energy Line Break (HELB) and Medium Energy Line Break (MELB) barrier between the mechanical penetration room and the service water penetration room.
"Subsequent review identified that the condition did not meet the reporting criterion.
"Engineering evaluation determined that the service water penetration room had been previously evaluated for the impact due to a HELB event occurring in the adjacent mechanical penetration area with the watertight door open and that the event would not impact the operability of the service system.
"Engineering evaluation also determined that the Salem Unit 1 Design Basis does not require analysis of a MELB event occurring in the service water penetration room. This is due to the timing of the Unit 1 operating license issue date. At the time of the issuance of the Unit 1 operating license analysis of a MELB event was not required. Therefore an unanalyzed condition for a MELB event did not exist.
"Additionally while the door was difficult to close, it was able to be closed and dogged in a reasonable time interval (27 minutes), therefore, any potential internal flooding which would have been detected immediately by the attendant with required actions taken to close the door and isolate the leak rapidly.
"Therefore PSEG is retracting the notification made under 10 CFR 50.72(b)(3)(ii)(B).
"The NRC Resident Inspector was notified of this retraction by the licensee."
Notified R1DO (Schroeder).
"At 0938 [EDT], the watertight door in the Unit 1 Inboard Service Water Penetration Area was unable to be closed. The watertight door serves as a High Energy Line Break (HELB) and Medium Energy Line Break (MELB) barrier between the mechanical penetration room and the service water penetration room. A HELB/MELB event occurring in a room with its barrier door open could adversely affect equipment in an adjacent room. Consequently, a HELB/MELB event could have rendered equipment in the adjacent room inoperable.
"At 1005, station maintenance was able to successfully close and latch the door restoring the barrier.
"This event is being reported under the requirements of 10CFR50.72(b)(3)(ii)(B) as, 'the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety.' An ENS notification is required if an unanalyzed condition occurred within 3 years of the date of discovery even if the event is not on-going at the time of discovery."
The licensee notified Lower Alloways Creek Township and the NRC Resident Inspector.
* * * RETRACTION FROM JOHN OSBORNE TO JOHN SHOEMAKER AT 1545 EST ON 12/12/16 * * *
"The purpose of this notification is to retract event report number 52294 made on 10/11/2016 at 1648 (ET). Previously PSEG reported that Salem Unit 1 was determined to be in an unanalyzed condition due to being unable to close the Unit 1 Inboard Service Water Penetration Area Water Tight Door. The watertight door was reported to serve as a High Energy Line Break (HELB) and Medium Energy Line Break (MELB) barrier between the mechanical penetration room and the service water penetration room.
"Subsequent review identified that the condition did not meet the reporting criterion.
"Engineering evaluation determined that the service water penetration room had been previously evaluated for the impact due to a HELB event occurring in the adjacent mechanical penetration area with the watertight door open and that the event would not impact the operability of the service system.
"Engineering evaluation also determined that the Salem Unit 1 Design Basis does not require analysis of a MELB event occurring in the service water penetration room. This is due to the timing of the Unit 1 operating license issue date. At the time of the issuance of the Unit 1 operating license analysis of a MELB event was not required. Therefore an unanalyzed condition for a MELB event did not exist.
"Additionally while the door was difficult to close, it was able to be closed and dogged in a reasonable time interval (27 minutes), therefore, any potential internal flooding which would have been detected immediately by the attendant with required actions taken to close the door and isolate the leak rapidly.
"Therefore PSEG is retracting the notification made under 10 CFR 50.72(b)(3)(ii)(B).
"The NRC Resident Inspector was notified of this retraction by the licensee."
Notified R1DO (Schroeder).