Event Notification Report for April 24, 2005
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/23/2005 - 04/24/2005
EVENT NUMBERS
41631
Power Reactor
Event Number: 41631
Facility: SUSQUEHANNA
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: RON FRY
HQ OPS Officer: CHAUNCEY GOULD
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: RON FRY
HQ OPS Officer: CHAUNCEY GOULD
Notification Date: 04/24/2005
Notification Time: 21:39 [ET]
Event Date: 04/24/2005
Event Time: 21:30 [EST]
Last Update Date: 04/24/2005
Notification Time: 21:39 [ET]
Event Date: 04/24/2005
Event Time: 21:30 [EST]
Last Update Date: 04/24/2005
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
DAVID SILK (R1)
MOHAMED SHANBAKY (R1)
DAVID SILK (R1)
MOHAMED SHANBAKY (R1)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
SPDS (SAFETY PARAMETER DISPLAY SYSTEM) IS DOWN FOR PLANNED MAINTENANCE
"At 2130 hours on 04/24/2005 the Unit 1 SPDS system will be removed from service for planned maintenance (cable rework). The duration of work is expected to be 32 hours (scheduled for completion at 0530 hours on 04/26/2005).
"ERDS will remain operable during the work window but several points will not be available. For example 23 of 58 ERDS points will be unavailable while SPDS is out of service. However, the ERDS system will still be operable and transmit the remaining points.
"Loss of Emergency Assessment Capability - A review of the ability of the Emergency organization to function without SPDS was performed. Alternate sources for many of the points in SPDS were identified and are contained on an Emergency Plan format in PICSY (plant integrated computer system). Those points not available from PICSY can be obtained from the control room. With these compensatory actions and the communications in place between the facilities, there will not be a major loss of emergency assessment capability.
"Since the Unit 1-SPDS computer system will be unavailable for greater than 8 hours, this is considered a Loss of Emergency Assessment Capability and reportable under 10CFR50.72(b)(3)(xiii)."
The NRC Resident Inspector was notified.
"At 2130 hours on 04/24/2005 the Unit 1 SPDS system will be removed from service for planned maintenance (cable rework). The duration of work is expected to be 32 hours (scheduled for completion at 0530 hours on 04/26/2005).
"ERDS will remain operable during the work window but several points will not be available. For example 23 of 58 ERDS points will be unavailable while SPDS is out of service. However, the ERDS system will still be operable and transmit the remaining points.
"Loss of Emergency Assessment Capability - A review of the ability of the Emergency organization to function without SPDS was performed. Alternate sources for many of the points in SPDS were identified and are contained on an Emergency Plan format in PICSY (plant integrated computer system). Those points not available from PICSY can be obtained from the control room. With these compensatory actions and the communications in place between the facilities, there will not be a major loss of emergency assessment capability.
"Since the Unit 1-SPDS computer system will be unavailable for greater than 8 hours, this is considered a Loss of Emergency Assessment Capability and reportable under 10CFR50.72(b)(3)(xiii)."
The NRC Resident Inspector was notified.