Event Notification Report for December 13, 2006
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/12/2006 - 12/13/2006
Power Reactor
Event Number: 43049
Facility: PERRY
Region: 3 State: OH
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: ROBERT KIDDER
HQ OPS Officer: JOE O'HARA
Region: 3 State: OH
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: ROBERT KIDDER
HQ OPS Officer: JOE O'HARA
Notification Date: 12/13/2006
Notification Time: 05:49 [ET]
Event Date: 12/13/2006
Event Time: 04:35 [EST]
Last Update Date: 12/13/2006
Notification Time: 05:49 [ET]
Event Date: 12/13/2006
Event Time: 04:35 [EST]
Last Update Date: 12/13/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Person (Organization):
JULIO LARA (R3)
JULIO LARA (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | M/R | Y | 100 | Power Operation | 0 | Hot Shutdown |
REACTOR SCRAM - LOSS OF INSTRUMENT AIR RESULTING IN FEEDWATER TRANSIENT AND MANUAL REACTOR SCRAM
"A loss of instrument air caused a transient in feed system causing a lowering Hot Surge Tank Level. The Reactor was manually scrammed when Reactor Feed Booster Pumps were cavitating. Control Rod 42-55 did not insert on the initial scram. Control Rod 42-55 did insert when ARI was manually initiated."
The loss of instrument air was the result of an air line rupture, and the licensee is steaming to the condenser while maintaining vessel level with feedwater. There was no ECCS injection, and the licensee is investigating the cause of the line rupture.
The licensee notified the NRC Resident Inspector.
* * * UPDATE AT 0814 ON 12/13/2006 FROM MICHAEL BROGAN TO MARK ABRAMOVITZ * * *
"This update is being made in accordance with 10CFR50.72(c)(2) to immediately report the results of ensuing evaluations or assessments of plant conditions, the effectiveness of response or protective measures taken, and information related to plant behavior that is not understood. On December 13, 2006, at 0549 hours, the Perry Nuclear Power Plant notified the NRC Operations Center (Event Number 43049) of a manual Reactor Protection System actuation associated with a loss of instrument air. In the initial report, it was stated that control rod 42-55 did not insert on the initial scram, but did insert when Alternate Rod Insertion was manually initiated. Subsequently, reactor engineering review of control rod performance during the event determined that the control rod scram time for control rod 4255 was satisfactory and that the problem was with the control rod indication. The plant remains stable at this time."
Control rod indication has two channels. Control rod 42-55 displayed one fully inserted indication and one blinking green indication (i.e. not fully inserted). When the system was reset, all rods indicated fully inserted with a "00" position indication.
The licensee notified the NRC Resident Inspector.
Notified the R3DO (Lara).
"A loss of instrument air caused a transient in feed system causing a lowering Hot Surge Tank Level. The Reactor was manually scrammed when Reactor Feed Booster Pumps were cavitating. Control Rod 42-55 did not insert on the initial scram. Control Rod 42-55 did insert when ARI was manually initiated."
The loss of instrument air was the result of an air line rupture, and the licensee is steaming to the condenser while maintaining vessel level with feedwater. There was no ECCS injection, and the licensee is investigating the cause of the line rupture.
The licensee notified the NRC Resident Inspector.
* * * UPDATE AT 0814 ON 12/13/2006 FROM MICHAEL BROGAN TO MARK ABRAMOVITZ * * *
"This update is being made in accordance with 10CFR50.72(c)(2) to immediately report the results of ensuing evaluations or assessments of plant conditions, the effectiveness of response or protective measures taken, and information related to plant behavior that is not understood. On December 13, 2006, at 0549 hours, the Perry Nuclear Power Plant notified the NRC Operations Center (Event Number 43049) of a manual Reactor Protection System actuation associated with a loss of instrument air. In the initial report, it was stated that control rod 42-55 did not insert on the initial scram, but did insert when Alternate Rod Insertion was manually initiated. Subsequently, reactor engineering review of control rod performance during the event determined that the control rod scram time for control rod 4255 was satisfactory and that the problem was with the control rod indication. The plant remains stable at this time."
Control rod indication has two channels. Control rod 42-55 displayed one fully inserted indication and one blinking green indication (i.e. not fully inserted). When the system was reset, all rods indicated fully inserted with a "00" position indication.
The licensee notified the NRC Resident Inspector.
Notified the R3DO (Lara).
Power Reactor
Event Number: 43050
Facility: THREE MILE ISLAND
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] B&W-L-LP,[2] B&W-L-LP
NRC Notified By: STUART BRANTLEY
HQ OPS Officer: JEFF ROTTON
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] B&W-L-LP,[2] B&W-L-LP
NRC Notified By: STUART BRANTLEY
HQ OPS Officer: JEFF ROTTON
Notification Date: 12/13/2006
Notification Time: 21:00 [ET]
Event Date: 12/13/2006
Event Time: 17:48 [EST]
Last Update Date: 12/13/2006
Notification Time: 21:00 [ET]
Event Date: 12/13/2006
Event Time: 17:48 [EST]
Last Update Date: 12/13/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Person (Organization):
RICHARD CONTE (R1)
RICHARD CONTE (R1)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | A/R | Y | 100 | Power Operation | 0 | Hot Shutdown |
UNIT REACTOR TRIP DUE TO GRID DISTURBANCE
"While operating at 100 % power the unit experienced an automatic Reactor trip from Reactor Protection System actuation at 17:48 on 12/13/06. At the time of the trip there was a grid disturbance followed by the unit tripping. The cause of the trip is under investigation. All plant systems functioned as designed. The unit is being maintained in Hot Shutdown conditions using applicable plant procedures."
All control rods inserted fully after the reactor trip. S/G safety valves lifted and reset per design during the transient. The S/Gs are being supplied with normal feedwater and decay heat is being removed to the main condenser via the steam dump valves. The electric plant is in a normal shutdown lineup and the EDGs are available.
The licensee notified the NRC Resident Inspector, PEMA, the Counties of Dauphin, Cumberland, Lancaster, York, and Lebanon.
"While operating at 100 % power the unit experienced an automatic Reactor trip from Reactor Protection System actuation at 17:48 on 12/13/06. At the time of the trip there was a grid disturbance followed by the unit tripping. The cause of the trip is under investigation. All plant systems functioned as designed. The unit is being maintained in Hot Shutdown conditions using applicable plant procedures."
All control rods inserted fully after the reactor trip. S/G safety valves lifted and reset per design during the transient. The S/Gs are being supplied with normal feedwater and decay heat is being removed to the main condenser via the steam dump valves. The electric plant is in a normal shutdown lineup and the EDGs are available.
The licensee notified the NRC Resident Inspector, PEMA, the Counties of Dauphin, Cumberland, Lancaster, York, and Lebanon.
General Information or Other
Event Number: 43051
Rep Org: OHIO BUREAU OF RADIATION PROTECTION
Licensee: BOWSER-MORNER, INC.
Region: 3
City: DAYTON State: OH
County:
License #: OH31210580003
Agreement: Y
Docket:
NRC Notified By: STEPHEN JAMES
HQ OPS Officer: JOHN MacKINNON
Licensee: BOWSER-MORNER, INC.
Region: 3
City: DAYTON State: OH
County:
License #: OH31210580003
Agreement: Y
Docket:
NRC Notified By: STEPHEN JAMES
HQ OPS Officer: JOHN MacKINNON
Notification Date: 12/14/2006
Notification Time: 12:27 [ET]
Event Date: 12/13/2006
Event Time: 15:30 [EST]
Last Update Date: 12/14/2006
Notification Time: 12:27 [ET]
Event Date: 12/13/2006
Event Time: 15:30 [EST]
Last Update Date: 12/14/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
JULIO LARA (R3)
GREG MORELL (NMSS)
ILTAB via email
JULIO LARA (R3)
GREG MORELL (NMSS)
ILTAB via email
OHIO AGREEMENT STATE REPORT - LOST/STOLEN MOISTURE DENSITY GAUGE
"Lost or stolen Troxler moisture density gauge from Toledo Office of licensee. Last physically seen on 11/28/06 in secure storage area. Was discovered missing when periodic inventory was being performed on 12/13/06. Gauge is not on licensee's premises or in possession of any current employees. Gauge has not been signed out in any utilization log since 11/28/06. Incident has been reported to Toledo Police Department. Licensee is still investigating. Troxler model 3440, S/N 023819, containing 10 mCi (millicuries) Cs-137 and 40 mCi Am-241. Reported to BRP on 12/13/06 at (approx.) 3: 30 PM."
Reference Number 2006-103
THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks.
"Lost or stolen Troxler moisture density gauge from Toledo Office of licensee. Last physically seen on 11/28/06 in secure storage area. Was discovered missing when periodic inventory was being performed on 12/13/06. Gauge is not on licensee's premises or in possession of any current employees. Gauge has not been signed out in any utilization log since 11/28/06. Incident has been reported to Toledo Police Department. Licensee is still investigating. Troxler model 3440, S/N 023819, containing 10 mCi (millicuries) Cs-137 and 40 mCi Am-241. Reported to BRP on 12/13/06 at (approx.) 3: 30 PM."
Reference Number 2006-103
THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks.