Event Notification Report for March 25, 2012
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
03/24/2012 - 03/25/2012
Power Reactor
Event Number: 47769
Facility: NORTH ANNA
Region: 2 State: VA
Unit: [1] [2] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: TED WEBNER
HQ OPS Officer: VINCE KLCO
Region: 2 State: VA
Unit: [1] [2] []
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: TED WEBNER
HQ OPS Officer: VINCE KLCO
Notification Date: 03/25/2012
Notification Time: 23:58 [ET]
Event Date: 03/25/2012
Event Time: 23:36 [EDT]
Last Update Date: 03/26/2012
Notification Time: 23:58 [ET]
Event Date: 03/25/2012
Event Time: 23:36 [EDT]
Last Update Date: 03/26/2012
Emergency Class: UNUSUAL EVENT
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLARED
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLARED
Person (Organization):
VICTOR MCCREE (R2RA)
ERIC LEEDS (NRR)
ROBERT HAAG (R2DO)
JEFF GRANT (IRD)
FREDERICK BROWN (NRR)
VICTOR MCCREE (R2RA)
ERIC LEEDS (NRR)
ROBERT HAAG (R2DO)
JEFF GRANT (IRD)
FREDERICK BROWN (NRR)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Refueling | 0 | Refueling |
| 2 | N | Y | 100 | Power Operation | 100 | Power Operation |
UNUSUAL EVENT DECLARED DUE TO SEISMIC ACTIVITY
On March 25, 2012 at 2336 EDT, an Unusual Event was declared due to an earthquake felt on site. The site entered EAL HU1.1. No plant systems were affected. The National Earthquake Information Center reported a magnitude 3.1 seismic event 6 miles south-south west of Mineral, Virginia. A plant inspection is on-going to determine any plant issues related to the seismic event. Unit 1 is in a refueling outage and containment integrity was maintained. Unit 2 continues in full power operation.
The licensee notified the NRC Resident Inspector, State and local agencies.
Notified DHS SWO, FEMA, NICC and Nuclear SSA via email.
* * * UPDATE FROM TED WEBNER TO VINCE KLCO ON 3/26/2012 AT 0417 EDT * * *
On March 26, 2012 at 0410 EDT, the Unusual Event was terminated. The basis for the termination was that all equipment walkdowns are complete with no damage discovered.
The licensee will notify the NRC Resident Inspector.
Notified the R2DO (Haag), NRR EO (Brown), IRD (Grant), DHS SWO, FEMA, NICC and the Nuclear SSA via email.
On March 25, 2012 at 2336 EDT, an Unusual Event was declared due to an earthquake felt on site. The site entered EAL HU1.1. No plant systems were affected. The National Earthquake Information Center reported a magnitude 3.1 seismic event 6 miles south-south west of Mineral, Virginia. A plant inspection is on-going to determine any plant issues related to the seismic event. Unit 1 is in a refueling outage and containment integrity was maintained. Unit 2 continues in full power operation.
The licensee notified the NRC Resident Inspector, State and local agencies.
Notified DHS SWO, FEMA, NICC and Nuclear SSA via email.
* * * UPDATE FROM TED WEBNER TO VINCE KLCO ON 3/26/2012 AT 0417 EDT * * *
On March 26, 2012 at 0410 EDT, the Unusual Event was terminated. The basis for the termination was that all equipment walkdowns are complete with no damage discovered.
The licensee will notify the NRC Resident Inspector.
Notified the R2DO (Haag), NRR EO (Brown), IRD (Grant), DHS SWO, FEMA, NICC and the Nuclear SSA via email.
Research Reactor
Event Number: 47770
Rep Org: MASSACHUSETTS INSTITUTE OF TECH
Licensee: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
Region: 1
City: CAMBRIDGE State: MA
County: MIDDLESEX
License #: R-37
Agreement: Y
Docket: 05000020
NRC Notified By: TOM NEWTON
HQ OPS Officer: HOWIE CROUCH
Licensee: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
Region: 1
City: CAMBRIDGE State: MA
County: MIDDLESEX
License #: R-37
Agreement: Y
Docket: 05000020
NRC Notified By: TOM NEWTON
HQ OPS Officer: HOWIE CROUCH
Notification Date: 03/26/2012
Notification Time: 10:04 [ET]
Event Date: 03/25/2012
Event Time: 05:15 [EDT]
Last Update Date: 03/26/2012
Notification Time: 10:04 [ET]
Event Date: 03/25/2012
Event Time: 05:15 [EDT]
Last Update Date: 03/26/2012
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
CHRISTOPHER NEWPORT (R1DO)
JESSIE QUICHOCHO (NRR)
AL ADAMS (NRR)
CHRISTOPHER NEWPORT (R1DO)
JESSIE QUICHOCHO (NRR)
AL ADAMS (NRR)
RESEARCH REACTOR MANUAL SCRAM
At 0356 hrs. EDT, while operating at full power, the reactor automatically scrammed on a high signal on period channel 3. At that time, it was believed that the scram was due to noise on the channel. All channels were checked and at 0449 hrs. it was decided that to restart the reactor.
During the startup, the rods were pulled to the estimated critical position (ECP) without indication on any of the period channels (3 channels installed). It was decided that the xenon could be precluding the reactor so it was decided to bump the rods out. After bumping out the rods, no increase in period was indicated. During the ensuing discussion, the operator observed power increasing and, at approximately 4 Mw, decided to manually scram the reactor.
Investigation into this event is ongoing.
At 0356 hrs. EDT, while operating at full power, the reactor automatically scrammed on a high signal on period channel 3. At that time, it was believed that the scram was due to noise on the channel. All channels were checked and at 0449 hrs. it was decided that to restart the reactor.
During the startup, the rods were pulled to the estimated critical position (ECP) without indication on any of the period channels (3 channels installed). It was decided that the xenon could be precluding the reactor so it was decided to bump the rods out. After bumping out the rods, no increase in period was indicated. During the ensuing discussion, the operator observed power increasing and, at approximately 4 Mw, decided to manually scram the reactor.
Investigation into this event is ongoing.