Event Notification Report for July 28, 2005
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
07/27/2005 - 07/28/2005
General Information or Other
Event Number: 41972
Rep Org: COLORADO DEPT OF HEALTH
Licensee: LAYNE CHRISTENSEN CO COLOG DIV
Region: 4
City: LAKEWOOD State: CO
County:
License #: COLO.971-01
Agreement: Y
Docket:
NRC Notified By: FAX
HQ OPS Officer: CHAUNCEY GOULD
Licensee: LAYNE CHRISTENSEN CO COLOG DIV
Region: 4
City: LAKEWOOD State: CO
County:
License #: COLO.971-01
Agreement: Y
Docket:
NRC Notified By: FAX
HQ OPS Officer: CHAUNCEY GOULD
Notification Date: 09/07/2005
Notification Time: 12:42 [ET]
Event Date: 07/28/2005
Event Time: 00:00 [MDT]
Last Update Date: 09/07/2005
Notification Time: 12:42 [ET]
Event Date: 07/28/2005
Event Time: 00:00 [MDT]
Last Update Date: 09/07/2005
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
DALE POWERS (R4)
LAWRENCE KOKAJKO (NMSS)
DALE POWERS (R4)
LAWRENCE KOKAJKO (NMSS)
WELL LOGGING SOURCE LODGED NEAR THE BOTTOM OF A 240 FOOT SHAFT
On July 28, 2005, a 100 milliCurie Cs-137 sealed source (New England Nuclear, Model 572, serial number 1623) became lodged near the bottom of a 240 foot shaft The logging probe and source had descended to that depth after breaking loose from the logging cable at the surface of the well. Repeated efforts to retrieve the source failed, Retrieval efforts were discontinued when a 4 foot section of an overshot device twisted off at approximately 210 feet down-hole.
The licensee submitted a written description of the event on August 23, 2005 and provided supplemental information on September 1, 2005 and September 2, 2005. Authorization to abandon the well formally approved on September 6, 2005.
On July 28, 2005, a 100 milliCurie Cs-137 sealed source (New England Nuclear, Model 572, serial number 1623) became lodged near the bottom of a 240 foot shaft The logging probe and source had descended to that depth after breaking loose from the logging cable at the surface of the well. Repeated efforts to retrieve the source failed, Retrieval efforts were discontinued when a 4 foot section of an overshot device twisted off at approximately 210 feet down-hole.
The licensee submitted a written description of the event on August 23, 2005 and provided supplemental information on September 1, 2005 and September 2, 2005. Authorization to abandon the well formally approved on September 6, 2005.
Fuel Cycle Facility
Event Number: 41882
Facility: PADUCAH GASEOUS DIFFUSION PLANT
Region: 2 State: KY
Unit: [] [] []
RX Type: URANIUM ENRICHMENT FACILITY
Comments: 2 DEMOCRACY CENTER
6903 ROCKLEDGE DRIVE
BETHESDA, MD 20817 (301)564-3200
NRC Notified By: M.C. PITMAN
HQ OPS Officer: JOHN KNOKE
Region: 2 State: KY
Unit: [] [] []
RX Type: URANIUM ENRICHMENT FACILITY
Comments: 2 DEMOCRACY CENTER
6903 ROCKLEDGE DRIVE
BETHESDA, MD 20817 (301)564-3200
NRC Notified By: M.C. PITMAN
HQ OPS Officer: JOHN KNOKE
Notification Date: 07/29/2005
Notification Time: 16:55 [ET]
Event Date: 07/28/2005
Event Time: 21:25 [CDT]
Last Update Date: 07/29/2005
Notification Time: 16:55 [ET]
Event Date: 07/28/2005
Event Time: 21:25 [CDT]
Last Update Date: 07/29/2005
Emergency Class: NON EMERGENCY
10 CFR Section:
76.120(c)(2) - SAFETY EQUIPMENT FAILURE
10 CFR Section:
76.120(c)(2) - SAFETY EQUIPMENT FAILURE
Person (Organization):
MALCOLM WIDMANN (R2)
JOSEPH GIITTER (NMSS)
MALCOLM WIDMANN (R2)
JOSEPH GIITTER (NMSS)
FAILURE OF SAFETY EQUIPMENT ON C-310 CYLINDER VALVE CLOSURE SYSTEM
"At 2125, on 7-29-05 the Plant Shift Superintendent was notified that the nitrogen bottle pressure for the C-310 Cylinder Valve Closure System was reading 0 psig. The function of this system is to close the cylinder valve in the case of an actuation of the UF6 Release Detection and Isolation System at the UF6 Withdrawal Station. TSR 2.3.4.1 requires this system to be operable while operating in mode 2. At the time the nitrogen bottle pressure was discovered to be reading 0 psig, withdrawal positions 3 and 4 were operating in mode 2. The UF6 Release Detection and Isolation System was declared inoperable by the PSS and withdrawal positions 3 and 4 were placed in mode 3 as required by TSR LCO 2.3.4.1.
"This event is reportable under 10 CFR 76.120(c)(2) as an event in which equipment required by the TSR is disabled or fails to function as designed.
"The NRC Senior Resident Inspector has been notified of this event."
The nitrogen bottle normally maintains a pressure of 1500-2000 psig. The system malfunction was found on the daily equipment check by the operator.
"At 2125, on 7-29-05 the Plant Shift Superintendent was notified that the nitrogen bottle pressure for the C-310 Cylinder Valve Closure System was reading 0 psig. The function of this system is to close the cylinder valve in the case of an actuation of the UF6 Release Detection and Isolation System at the UF6 Withdrawal Station. TSR 2.3.4.1 requires this system to be operable while operating in mode 2. At the time the nitrogen bottle pressure was discovered to be reading 0 psig, withdrawal positions 3 and 4 were operating in mode 2. The UF6 Release Detection and Isolation System was declared inoperable by the PSS and withdrawal positions 3 and 4 were placed in mode 3 as required by TSR LCO 2.3.4.1.
"This event is reportable under 10 CFR 76.120(c)(2) as an event in which equipment required by the TSR is disabled or fails to function as designed.
"The NRC Senior Resident Inspector has been notified of this event."
The nitrogen bottle normally maintains a pressure of 1500-2000 psig. The system malfunction was found on the daily equipment check by the operator.