Event Notification Report for August 01, 2001
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/31/2001 - 08/01/2001
Power Reactor
Event Number: 38179
Facility: PRAIRIE ISLAND
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] W-2-LP,[2] W-2-LP
NRC Notified By: BRUCE ANDERSON
HQ OPS Officer: BOB STRANSKY
Region: 3 State: MN
Unit: [1] [] []
RX Type: [1] W-2-LP,[2] W-2-LP
NRC Notified By: BRUCE ANDERSON
HQ OPS Officer: BOB STRANSKY
Notification Date: 08/01/2001
Notification Time: 09:05 [ET]
Event Date: 08/01/2001
Event Time: 07:01 [CDT]
Last Update Date: 08/02/2001
Notification Time: 09:05 [ET]
Event Date: 08/01/2001
Event Time: 07:01 [CDT]
Last Update Date: 08/02/2001
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
PATRICK HILAND (R3)
PATRICK HILAND (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | A/R | Y | 100 | Power Operation | 0 | Hot Standby |
AUTOMATIC REACTOR TRIP DUE TO NEGATIVE FLUX RATE
The unit automatically tripped from 100%; the first out annunciator was Flux Rate Reactor Trip. Immediately following the trip, the rod position indicator showed that five control rods did not insert completely. The stuck control rods indicated 15-20 steps out from bottom. Operators entered their reactor trip/safety injection emergency procedure (1E0), but were able to transition to the trip recovery procedure (1ES0.1). One of the stuck control rods subsequently indicated full insertion. The unit is currently stable in Mode 3. Operators are emergency borating the reactor per 1ES0.1 a total of 1000 gallons (250 gallons per stuck rod). The licensee is continuing their trip recovery. Preliminary investigation indicates a problem with the rod control system may have led to one or more dropped control rods.
The NRC resident inspector has been informed of this event by the licensee.
* * * UPDATE 1025 EDT 8/1/01 FROM DAMMANN TAKEN BY JONES * * *
The licensee reported that the auxiliary feedwater (AFW) system (pumps 11 and 12) automatically actuated on steam generator low-low level following the trip, as expected. In addition, two of the stuck rods are now indicating full insertion. The NRC resident inspector has been informed of this update.
* * * UPDATE 1624 EDT 08/01/01 FROM GOSMAN TAKEN BY MACKINNON * * *
After interviewing the Reactor Operators it was determined that 6 rod bottom lights did not immediately come on after the reactor trip. Also a media press release will be made concerning this event. R3DO (John Madera) notified.
The NRC resident inspector was notified of this update by the licensee.
* * * UPDATE 0431 EDT 8/2/01 FROM IRVIN TAKEN BY STRANSKY * * *
"Investigation into the cause of the reactor trip has determined that control rods associated with Rod Control Power Cabinet 2AC began to insert into the core. As designed, the reactor protection system actuated to insert the remaining control rods.
"In accordance with procedures, operators verified the reactor had safely shutdown. However, indicator lights for six of twenty-nine individual control rods did not indicate that the rods had fully inserted. This situation is addressed in the reactor trip procedure and the operators responded appropriately by borating to compensate.
"Control rod drop testing has been performed and has verified that all control rods fully inserted. Individual rod position indication calibration check is in progress."
The NRC resident inspector will be informed of this update by the licensee.
The unit automatically tripped from 100%; the first out annunciator was Flux Rate Reactor Trip. Immediately following the trip, the rod position indicator showed that five control rods did not insert completely. The stuck control rods indicated 15-20 steps out from bottom. Operators entered their reactor trip/safety injection emergency procedure (1E0), but were able to transition to the trip recovery procedure (1ES0.1). One of the stuck control rods subsequently indicated full insertion. The unit is currently stable in Mode 3. Operators are emergency borating the reactor per 1ES0.1 a total of 1000 gallons (250 gallons per stuck rod). The licensee is continuing their trip recovery. Preliminary investigation indicates a problem with the rod control system may have led to one or more dropped control rods.
The NRC resident inspector has been informed of this event by the licensee.
* * * UPDATE 1025 EDT 8/1/01 FROM DAMMANN TAKEN BY JONES * * *
The licensee reported that the auxiliary feedwater (AFW) system (pumps 11 and 12) automatically actuated on steam generator low-low level following the trip, as expected. In addition, two of the stuck rods are now indicating full insertion. The NRC resident inspector has been informed of this update.
* * * UPDATE 1624 EDT 08/01/01 FROM GOSMAN TAKEN BY MACKINNON * * *
After interviewing the Reactor Operators it was determined that 6 rod bottom lights did not immediately come on after the reactor trip. Also a media press release will be made concerning this event. R3DO (John Madera) notified.
The NRC resident inspector was notified of this update by the licensee.
* * * UPDATE 0431 EDT 8/2/01 FROM IRVIN TAKEN BY STRANSKY * * *
"Investigation into the cause of the reactor trip has determined that control rods associated with Rod Control Power Cabinet 2AC began to insert into the core. As designed, the reactor protection system actuated to insert the remaining control rods.
"In accordance with procedures, operators verified the reactor had safely shutdown. However, indicator lights for six of twenty-nine individual control rods did not indicate that the rods had fully inserted. This situation is addressed in the reactor trip procedure and the operators responded appropriately by borating to compensate.
"Control rod drop testing has been performed and has verified that all control rods fully inserted. Individual rod position indication calibration check is in progress."
The NRC resident inspector will be informed of this update by the licensee.
Other Nuclear Material
Event Number: 38794
Rep Org: MICHIGAN DEPT OF ENVIRONMENTAL QUAL
Licensee: FORD MOTOR COMPANY
Region: 3
City: DEARBORN State: MI
County:
License #: 1429-1811-GL
Agreement: N
Docket:
NRC Notified By: T. R. WENTWORTH
HQ OPS Officer: GERRY WAIG
Licensee: FORD MOTOR COMPANY
Region: 3
City: DEARBORN State: MI
County:
License #: 1429-1811-GL
Agreement: N
Docket:
NRC Notified By: T. R. WENTWORTH
HQ OPS Officer: GERRY WAIG
Notification Date: 03/21/2002
Notification Time: 15:52 [ET]
Event Date: 08/01/2001
Event Time: 00:00 [EST]
Last Update Date: 03/21/2002
Notification Time: 15:52 [ET]
Event Date: 08/01/2001
Event Time: 00:00 [EST]
Last Update Date: 03/21/2002
Emergency Class: NON EMERGENCY
10 CFR Section:
20.2201(a)(1)(i) - LOST/STOLEN LNM>1000X
10 CFR Section:
20.2201(a)(1)(i) - LOST/STOLEN LNM>1000X
Person (Organization):
MONTE PHILLIPS (R3)
JOHN HICKEY (NMSS)
MONTE PHILLIPS (R3)
JOHN HICKEY (NMSS)
LOSS OF POLONIUM-210 STATIC ELIMINATOR
The lost source was a 10 millicurie source (3/01) manufactured by NRD Inc.
The following is taken from a letter from Mr. Larry Hathorne, Ford Motor Co. to Mr. David Minnar, Michigan Dept of Environmental Quality dated March 15, 2002:
"This letter is pertinent to the lost of an anti-static air gun. The model number is P-2021. The serial number A2AW954 is on lease number 007136 and was shipped on 3/19/01. The device was used for spraying acrylic and also to prevent dust. The device was used in the Plastic Shop. It was last used doing the Month of August, 2001. To my knowledge, the device was misplaced or stolen. The efforts that was made was searching of the shop and questioning the shop personnel. This situation has been brought to management attention. The decision was made to not replace the anti-static gun."
The lost source was a 10 millicurie source (3/01) manufactured by NRD Inc.
The following is taken from a letter from Mr. Larry Hathorne, Ford Motor Co. to Mr. David Minnar, Michigan Dept of Environmental Quality dated March 15, 2002:
"This letter is pertinent to the lost of an anti-static air gun. The model number is P-2021. The serial number A2AW954 is on lease number 007136 and was shipped on 3/19/01. The device was used for spraying acrylic and also to prevent dust. The device was used in the Plastic Shop. It was last used doing the Month of August, 2001. To my knowledge, the device was misplaced or stolen. The efforts that was made was searching of the shop and questioning the shop personnel. This situation has been brought to management attention. The decision was made to not replace the anti-static gun."