Event Notification Report for June 08, 2001
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/07/2001 - 06/08/2001
EVENT NUMBERS
38059
Power Reactor
Event Number: 38059
Facility: PILGRIM
Region: 1 State: MA
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: ERIC OLSON
HQ OPS Officer: STEVE SANDIN
Region: 1 State: MA
Unit: [1] [] []
RX Type: [1] GE-3
NRC Notified By: ERIC OLSON
HQ OPS Officer: STEVE SANDIN
Notification Date: 06/08/2001
Notification Time: 17:12 [ET]
Event Date: 06/08/2001
Event Time: 16:15 [EDT]
Last Update Date: 06/08/2001
Notification Time: 17:12 [ET]
Event Date: 06/08/2001
Event Time: 16:15 [EDT]
Last Update Date: 06/08/2001
Emergency Class: NON EMERGENCY
10 CFR Section:
70.52(a) - LOSS OF SNM/CRIT
10 CFR Section:
70.52(a) - LOSS OF SNM/CRIT
Person (Organization):
MICHELE EVANS (R1)
M. WAYNE HODGES (NMSS)
TAD MARSH (NRR)
MICHELE EVANS (R1)
M. WAYNE HODGES (NMSS)
TAD MARSH (NRR)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
SPECIAL NUCLEAR MATERIAL (SNM) REPORT INVOLVING 1 MILLIGRAM U-235
"During [the] process of replacing the 'A' Transverse In-Core Probe (TIP) Detector, the old detector was removed and its serial number recorded. The serial number was not the serial number expected. The expected serial number was 6553444 and the detector that was removed had serial number 6608500. The TIP detector is a fission chamber that utilizes approximately 1 milligram of enriched uranium and is therefore treated as SNM.
"During 1975 to 1986, Pilgrim did not track TIP detectors as SNM due to being less than one gram of SNM. It is suspected that during this time frame this detector was changed out. In 1987 a records search was made but did not reveal maintenance performed on this detector. However, an intensive records search will be performed as well as corrective actions yet to be determined."
The licensee informed the NRC resident inspector.
"During [the] process of replacing the 'A' Transverse In-Core Probe (TIP) Detector, the old detector was removed and its serial number recorded. The serial number was not the serial number expected. The expected serial number was 6553444 and the detector that was removed had serial number 6608500. The TIP detector is a fission chamber that utilizes approximately 1 milligram of enriched uranium and is therefore treated as SNM.
"During 1975 to 1986, Pilgrim did not track TIP detectors as SNM due to being less than one gram of SNM. It is suspected that during this time frame this detector was changed out. In 1987 a records search was made but did not reveal maintenance performed on this detector. However, an intensive records search will be performed as well as corrective actions yet to be determined."
The licensee informed the NRC resident inspector.