Event Notification Report for June 19, 2001
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/18/2001 - 06/19/2001
EVENT NUMBERS
38079
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 38079
Facility: MONTICELLO
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: PEDERSON
HQ OPS Officer: CHAUNCEY GOULD
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: PEDERSON
HQ OPS Officer: CHAUNCEY GOULD
Notification Date: 06/19/2001
Notification Time: 12:13 [ET]
Event Date: 06/19/2001
Event Time: 09:15 [CDT]
Last Update Date: 06/22/2001
Notification Time: 12:13 [ET]
Event Date: 06/19/2001
Event Time: 09:15 [CDT]
Last Update Date: 06/22/2001
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
10 CFR Section:
50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Person (Organization):
MONTE PHILLIPS (R3)
MONTE PHILLIPS (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
HIGH PRESSURE COOLANT INJECTION (HPCI) SYSTEM DECLARED INOPERABLE
HPCI system was declared inoperable due to all alarm functions not operating. The local undervoltage alarms did not annunciate in the control room. This condition was discovered during a normal routine test. They were attempting to send a signal from the local HPCI panel in the plant to the control room, but the control room did not receive it. They verified that the local panel is operable. An operator was locally stationed at the subject panel to verify current alarm status and call the control room. Therefore, in this mode of operation, the HPCI system has been declared operable. They are still investigating the problem with signal transmission.
The NRC Resident Inspector was notified.
The State and local agencies will be informed.
* * * RETRACTION CALLED IN AT 1110 ET ON 06/22/01 BY BRETT WELLER TAKEN BY MACKINNON * *
This notification retracts the above notification which was made due to HPCI being declared inoperable because of a questionable 250VDC MCC power. This uncertainty was based on control room annunciator that did not operate as expected when alarm checks were performed. After investigation it was determined that there was no degraded power system, nor was there any problem with the voltage sensing circuit, and HPCI was operable at all times during the event. A faulty control room annunciator alarm card caused the confusion regarding the HPCI power source. State and Local authorities were notified of this retraction by the licensee. R3DO (B. Jorgensen) notified.
The NRC Resident Inspector will notified of this retraction by the licensee.
HPCI system was declared inoperable due to all alarm functions not operating. The local undervoltage alarms did not annunciate in the control room. This condition was discovered during a normal routine test. They were attempting to send a signal from the local HPCI panel in the plant to the control room, but the control room did not receive it. They verified that the local panel is operable. An operator was locally stationed at the subject panel to verify current alarm status and call the control room. Therefore, in this mode of operation, the HPCI system has been declared operable. They are still investigating the problem with signal transmission.
The NRC Resident Inspector was notified.
The State and local agencies will be informed.
* * * RETRACTION CALLED IN AT 1110 ET ON 06/22/01 BY BRETT WELLER TAKEN BY MACKINNON * *
This notification retracts the above notification which was made due to HPCI being declared inoperable because of a questionable 250VDC MCC power. This uncertainty was based on control room annunciator that did not operate as expected when alarm checks were performed. After investigation it was determined that there was no degraded power system, nor was there any problem with the voltage sensing circuit, and HPCI was operable at all times during the event. A faulty control room annunciator alarm card caused the confusion regarding the HPCI power source. State and Local authorities were notified of this retraction by the licensee. R3DO (B. Jorgensen) notified.
The NRC Resident Inspector will notified of this retraction by the licensee.