Event Notification Report for November 27, 2006
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
11/26/2006 - 11/27/2006
Power Reactor
Event Number: 43013
Facility: FT CALHOUN
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] CE
NRC Notified By: CHUCK MARASCO
HQ OPS Officer: STEVE SANDIN
Region: 4 State: NE
Unit: [1] [] []
RX Type: [1] CE
NRC Notified By: CHUCK MARASCO
HQ OPS Officer: STEVE SANDIN
Notification Date: 11/27/2006
Notification Time: 16:47 [ET]
Event Date: 11/27/2006
Event Time: 13:30 [CST]
Last Update Date: 11/27/2006
Notification Time: 16:47 [ET]
Event Date: 11/27/2006
Event Time: 13:30 [CST]
Last Update Date: 11/27/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(B) - POT RHR INOP
10 CFR Section:
50.72(b)(3)(v)(B) - POT RHR INOP
Person (Organization):
RUSSELL BYWATER (R4)
RUSSELL BYWATER (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Hot Standby | 0 | Hot Shutdown |
MOMENTARY LOSS OF SHUTDOWN COOLING DUE TO RHR ISOLATION SIGNAL
"On November 27, 2006 Fort Calhoun Station was on shutdown cooling, while in the process of moving the plant from Mode 3 to Mode 4 to fix a leak on an In-Core Instrument (ICI) Grayloc fitting. At 1327 Reactor Coolant Pump RC-3B was secured. At 1330, the last Reactor Coolant Pump (RC-3A) was secured. Once the reactor coolant pumps were secured, spray to the pressurizer was lost. This loss of pressurizer spray caused pressure in the pressurizer to rise; the systems pressure interlock caused HCV-347, Shutdown Cooling Loop 2 Outboard Isolation Valve, and HCV-348, Loop 2 to Shutdown Cooling Isolation Valve to close due to pressurizer pressure being greater than 250 psia.
"At 1330 the Control Room entered AOP-19 for a Loss of Shutdown Cooling. The control room operators initiated auxiliary spray, lowered pressure, reopened HCV-347/348, and started Low Pressure Safety Injection Pump SI-1A. At 1342 shutdown cooling was reestablished. At 1352 all conditions to exit AOP-19 were met and the procedure was exited. During the 12 minutes that shutdown cooling was lost the highest pressure reached in the RCS was 254 psia up from 233 psi and the highest temperature was 135 degrees, up from 134 degrees as read on the core exit thermocouples."
The licensee informed the NRC Resident Inspector.
"On November 27, 2006 Fort Calhoun Station was on shutdown cooling, while in the process of moving the plant from Mode 3 to Mode 4 to fix a leak on an In-Core Instrument (ICI) Grayloc fitting. At 1327 Reactor Coolant Pump RC-3B was secured. At 1330, the last Reactor Coolant Pump (RC-3A) was secured. Once the reactor coolant pumps were secured, spray to the pressurizer was lost. This loss of pressurizer spray caused pressure in the pressurizer to rise; the systems pressure interlock caused HCV-347, Shutdown Cooling Loop 2 Outboard Isolation Valve, and HCV-348, Loop 2 to Shutdown Cooling Isolation Valve to close due to pressurizer pressure being greater than 250 psia.
"At 1330 the Control Room entered AOP-19 for a Loss of Shutdown Cooling. The control room operators initiated auxiliary spray, lowered pressure, reopened HCV-347/348, and started Low Pressure Safety Injection Pump SI-1A. At 1342 shutdown cooling was reestablished. At 1352 all conditions to exit AOP-19 were met and the procedure was exited. During the 12 minutes that shutdown cooling was lost the highest pressure reached in the RCS was 254 psia up from 233 psi and the highest temperature was 135 degrees, up from 134 degrees as read on the core exit thermocouples."
The licensee informed the NRC Resident Inspector.
General Information or Other
Event Number: 43045
Rep Org: NE DIV OF RADIOACTIVE MATERIALS
Licensee: NO FRILLS SUPERMARKETS
Region: 4
City: OMAHA State: NE
County:
License #: GL0189
Agreement: Y
Docket:
NRC Notified By: TRUDY HILLS
HQ OPS Officer: JEFF ROTTON
Licensee: NO FRILLS SUPERMARKETS
Region: 4
City: OMAHA State: NE
County:
License #: GL0189
Agreement: Y
Docket:
NRC Notified By: TRUDY HILLS
HQ OPS Officer: JEFF ROTTON
Notification Date: 12/11/2006
Notification Time: 16:14 [ET]
Event Date: 11/27/2006
Event Time: 00:00 [CST]
Last Update Date: 12/11/2006
Notification Time: 16:14 [ET]
Event Date: 11/27/2006
Event Time: 00:00 [CST]
Last Update Date: 12/11/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
LINDA SMITH (R4)
GARY JANOSKO (NMSS)
ILTAB via email
LINDA SMITH (R4)
GARY JANOSKO (NMSS)
ILTAB via email
NEBRASKA AGREEMENT STATE REPORT - MISSING TRITIUM EXIT SIGN
The licensee provided the following information via email:
"The licensee discovered a missing self-luminous sign (Safety Light Model 2040, Serial number D76434) upon doing the annual inventory. They believe the sign was removed by the contractor during a remodeling project in the building about four months before. They believe the sign is in the landfill. They will replace all of the self-luminous exit signs with non radioactive exit signs in 2007."
Isotope - Tritium, Activity - 25 Curies.
Nebraska Event Number: NE060008
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.
This source is not amongst those sources or devices identified by the IAEA Code of Conduct for the Safety & Security of Radioactive Sources to be of concern from a radiological standpoint. Therefore is it being categorized as a less than Category 3 source
The licensee provided the following information via email:
"The licensee discovered a missing self-luminous sign (Safety Light Model 2040, Serial number D76434) upon doing the annual inventory. They believe the sign was removed by the contractor during a remodeling project in the building about four months before. They believe the sign is in the landfill. They will replace all of the self-luminous exit signs with non radioactive exit signs in 2007."
Isotope - Tritium, Activity - 25 Curies.
Nebraska Event Number: NE060008
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.
This source is not amongst those sources or devices identified by the IAEA Code of Conduct for the Safety & Security of Radioactive Sources to be of concern from a radiological standpoint. Therefore is it being categorized as a less than Category 3 source