Event Notification Report for April 03, 2005
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/02/2005 - 04/03/2005
EVENT NUMBERS
41682
Power Reactor
Event Number: 41682
Facility: DRESDEN
Region: 3 State: IL
Unit: [] [2] []
RX Type: [1] GE-1,[2] GE-3,[3] GE-3
NRC Notified By: GARY SIPE
HQ OPS Officer: MARK ABRAMOVITZ
Region: 3 State: IL
Unit: [] [2] []
RX Type: [1] GE-1,[2] GE-3,[3] GE-3
NRC Notified By: GARY SIPE
HQ OPS Officer: MARK ABRAMOVITZ
Notification Date: 05/09/2005
Notification Time: 21:37 [ET]
Event Date: 04/03/2005
Event Time: 06:04 [CDT]
Last Update Date: 05/09/2005
Notification Time: 21:37 [ET]
Event Date: 04/03/2005
Event Time: 06:04 [CDT]
Last Update Date: 05/09/2005
Emergency Class: NON EMERGENCY
10 CFR Section:
50.73(a)(1) - INVALID SPECIF SYSTEM ACTUATION
10 CFR Section:
50.73(a)(1) - INVALID SPECIF SYSTEM ACTUATION
Person (Organization):
KENNETH RIEMER (R3)
KENNETH RIEMER (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | N | Y | 97 | Power Operation | 97 | Power Operation |
CONTAINMENT ISOLATION VALVE CLOSURE
"This telephone notification is provided in accordance with 10 CFR 50.73(a)(1), to report an invalid actuation reportable under 10 CFR 50.73(a)(2)(iv)(A), 'Any event or condition that resulted in manual or automatic actuation of any system listed in paragraph (a)(2)(iv)(B).' General containment isolation signals affecting containment isolation valves in more than one system are identified in paragraph (a)(2)(iv)(B).
"On April 3, 2005, at 0604 hours, with Unit 2 in Mode 1, 'Power Operation,' fuse 2-902-3-RR-F20 in the 902-3 panel failed, which resulted in a partial Group 2 Primary Containment Isolation. The containment isolation signal affected containment isolation valves in more than one system. All affected containment isolation valves operated as designed.
"The fuse was successfully replaced and all affected components were restored to operable status."
The fuse was replaced at 0630 on 4/3/2005 and isolation valves were restored to the normal at-power lineup at 0637.
The licensee notified the NRC Resident Inspector.
"This telephone notification is provided in accordance with 10 CFR 50.73(a)(1), to report an invalid actuation reportable under 10 CFR 50.73(a)(2)(iv)(A), 'Any event or condition that resulted in manual or automatic actuation of any system listed in paragraph (a)(2)(iv)(B).' General containment isolation signals affecting containment isolation valves in more than one system are identified in paragraph (a)(2)(iv)(B).
"On April 3, 2005, at 0604 hours, with Unit 2 in Mode 1, 'Power Operation,' fuse 2-902-3-RR-F20 in the 902-3 panel failed, which resulted in a partial Group 2 Primary Containment Isolation. The containment isolation signal affected containment isolation valves in more than one system. All affected containment isolation valves operated as designed.
"The fuse was successfully replaced and all affected components were restored to operable status."
The fuse was replaced at 0630 on 4/3/2005 and isolation valves were restored to the normal at-power lineup at 0637.
The licensee notified the NRC Resident Inspector.