Event Notification Report for April 25, 2002
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/24/2002 - 04/25/2002
Hospital
Event Number: 38877
Rep Org: GRIFFIN HOSPITAL
Licensee: GRIFFIN HOSPITAL
Region: 1
City: BRIDGEPORT State: CT
County:
License #:
Agreement: N
Docket:
NRC Notified By: STUART KORZHIN
HQ OPS Officer: RICH LAURA
Licensee: GRIFFIN HOSPITAL
Region: 1
City: BRIDGEPORT State: CT
County:
License #:
Agreement: N
Docket:
NRC Notified By: STUART KORZHIN
HQ OPS Officer: RICH LAURA
Notification Date: 04/25/2002
Notification Time: 16:05 [ET]
Event Date: 04/25/2002
Event Time: 00:00 [EDT]
Last Update Date: 04/25/2002
Notification Time: 16:05 [ET]
Event Date: 04/25/2002
Event Time: 00:00 [EDT]
Last Update Date: 04/25/2002
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
CLIFFORD ANDERSON (R1)
DOUG BROADDUS (NMSS)
CLIFFORD ANDERSON (R1)
DOUG BROADDUS (NMSS)
TRASH BURNING FACILITY RADIATION MONITORS ALARM ON WASTE SHIPMENT FROM GRIFFIN HOSPITAL
The Bridgeport RESCO trash burning facility notified the Griffin Hospital that a waste shipment from the hospital set off the radiation monitors. A consultant from the hospital was dispatched to the trash facility to identify the cause of the alarm. The consultant reviewed the waste records from the hospital and preliminarily determined that a radioactive diaper was most probably the source of the radioactivity.
***UPDATE S. KORZHIN to R. LAURA on 4/25/02 at 1830***
Investigation found approximately 5 or 6 diapers with patient waste that had a maximum surface reading of 10 millirem per hour. The radioactive isotope involved was iodine-131. The diapers will be transported back to the hospital where they will be stored for radioactive decay. Also assisting the hospital contractor was the Connecticut Department of Environmental Protection.
Notified R1DO (C. Anderson)
The Bridgeport RESCO trash burning facility notified the Griffin Hospital that a waste shipment from the hospital set off the radiation monitors. A consultant from the hospital was dispatched to the trash facility to identify the cause of the alarm. The consultant reviewed the waste records from the hospital and preliminarily determined that a radioactive diaper was most probably the source of the radioactivity.
***UPDATE S. KORZHIN to R. LAURA on 4/25/02 at 1830***
Investigation found approximately 5 or 6 diapers with patient waste that had a maximum surface reading of 10 millirem per hour. The radioactive isotope involved was iodine-131. The diapers will be transported back to the hospital where they will be stored for radioactive decay. Also assisting the hospital contractor was the Connecticut Department of Environmental Protection.
Notified R1DO (C. Anderson)
Power Reactor
Event Number: 38876
Facility: CLINTON
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: WILLIAM MAYES
HQ OPS Officer: RICH LAURA
Region: 3 State: IL
Unit: [1] [] []
RX Type: [1] GE-6
NRC Notified By: WILLIAM MAYES
HQ OPS Officer: RICH LAURA
Notification Date: 04/25/2002
Notification Time: 12:23 [ET]
Event Date: 04/25/2002
Event Time: 05:13 [CDT]
Last Update Date: 04/25/2002
Notification Time: 12:23 [ET]
Event Date: 04/25/2002
Event Time: 05:13 [CDT]
Last Update Date: 04/25/2002
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
10 CFR Section:
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Person (Organization):
JOHN JACOBSON (R3)
JOHN JACOBSON (R3)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Refueling | 0 | Refueling |
START OF DIVISION III DIESEL DUE TO GRID VOLTAGE DIP
"On 4/25/02 at 0513 while lining up to backfeed through the main power transformers in preparation for a
Reserve Auxiliary Transformer outage, a low grid voltage condition occurred, resulting in the auto start of
the Division 3 Diesel Generator.
"The Procedure to backfeed power from the switchyard to the plant electrical buses was in progress. This
procedure was being used to support removing one of the offsite power sources supplied through the
Reserve Auxiliary Transformer (RAT) which was being removed from service for maintenance. When the
disconnect was closed in the switchyard completing the backfeed, the Static Var Compensators (SVC) for
the two offsite powers sources, the RAT SVC and the Emergency Reserve Auxiliary Transformer (ERAT)
SVC tripped. The offsite power sources supplying the RAT and ERAT remained energized
"The SVCs maintain voltage from the RAT and ERAT to the plant within a constant voltage band. Without
the SVCs, low grid voltage may result in low 4160kv bus voltage. At the time this occurred the Division 1
and 2 buses were being supplied from the RAT, which has three 345kv sources, and the Division 3 bus was
being supplied from a separate 138kv source. It was the 138 kv source that experienced the degraded
voltage that resulted in thc Division 3 ERAT supply breaker opening (offsite power source) and the
Division 3 Diesel Generator starting and closing in on the Division 3 bus.
"Following the grid voltage transient, grid voltage returned to the pretransient level. The RAT and ERAT
SVCs were restored to service and both offsite power sources were made operable. No damage to plant
equipment was observed during the initial investigation. The Division 3 Diesel Generator was paralleled to
the ERAT offsite power source and loaded. The diesel generator has been divorced from the ERAT and the
Division 3 bus is being carried by the ERAT in the normal lineup."
The NRC Resident Inspector was notified.
"On 4/25/02 at 0513 while lining up to backfeed through the main power transformers in preparation for a
Reserve Auxiliary Transformer outage, a low grid voltage condition occurred, resulting in the auto start of
the Division 3 Diesel Generator.
"The Procedure to backfeed power from the switchyard to the plant electrical buses was in progress. This
procedure was being used to support removing one of the offsite power sources supplied through the
Reserve Auxiliary Transformer (RAT) which was being removed from service for maintenance. When the
disconnect was closed in the switchyard completing the backfeed, the Static Var Compensators (SVC) for
the two offsite powers sources, the RAT SVC and the Emergency Reserve Auxiliary Transformer (ERAT)
SVC tripped. The offsite power sources supplying the RAT and ERAT remained energized
"The SVCs maintain voltage from the RAT and ERAT to the plant within a constant voltage band. Without
the SVCs, low grid voltage may result in low 4160kv bus voltage. At the time this occurred the Division 1
and 2 buses were being supplied from the RAT, which has three 345kv sources, and the Division 3 bus was
being supplied from a separate 138kv source. It was the 138 kv source that experienced the degraded
voltage that resulted in thc Division 3 ERAT supply breaker opening (offsite power source) and the
Division 3 Diesel Generator starting and closing in on the Division 3 bus.
"Following the grid voltage transient, grid voltage returned to the pretransient level. The RAT and ERAT
SVCs were restored to service and both offsite power sources were made operable. No damage to plant
equipment was observed during the initial investigation. The Division 3 Diesel Generator was paralleled to
the ERAT offsite power source and loaded. The diesel generator has been divorced from the ERAT and the
Division 3 bus is being carried by the ERAT in the normal lineup."
The NRC Resident Inspector was notified.