Event Notification Report for November 08, 2021
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
11/07/2021 - 11/08/2021
Non-Power Reactor
Event Number: 55568
Rep Org: Univ Of Missouri-Columbia (MISC)
Licensee: University Of Missouri
Region: 0
City: Columbia State: MO
County: Boone
License #: R-103
Agreement: N
Docket: 05000186
NRC Notified By: Bruce Meffert
HQ OPS Officer: Brian Lin
Licensee: University Of Missouri
Region: 0
City: Columbia State: MO
County: Boone
License #: R-103
Agreement: N
Docket: 05000186
NRC Notified By: Bruce Meffert
HQ OPS Officer: Brian Lin
Notification Date: 11/09/2021
Notification Time: 23:50 [ET]
Event Date: 11/08/2021
Event Time: 00:00 [CST]
Last Update Date: 11/10/2021
Notification Time: 23:50 [ET]
Event Date: 11/08/2021
Event Time: 00:00 [CST]
Last Update Date: 11/10/2021
Emergency Class: Non Emergency
10 CFR Section:
10 CFR Section:
Person (Organization):
Wertz, Geoffrey (PM)
Takacs, Michael (NPR COOR)
Wertz, Geoffrey (PM)
Takacs, Michael (NPR COOR)
EN Revision Imported Date: 12/9/2021
EN Revision Text: TECHNICAL SPECIFICATION VIOLATION
"This is a required notification per University Of Missouri Research Reactor (MURR) Technical Specification (TS) 6.6.c(1) to report to the NRC Operations Center that an Abnormal Occurrence, as defined by MURR TS 1.1, had occurred. MURR was not in compliance with one Limiting Conditions of Operations (LCO). TS 3.2.f states, 'The reactor shall not be operated unless the following rod run-in functions are operable.' Specifically, the rod run-in function that occurs when water level in the anti-siphon system is greater than or equal to 6 inches above the anti-siphon isolation valves was not operable as required by TS 3.2.f.6.
"On 11/8/21 while the reactor was shut down for maintenance and conducting surveillance testing on the anti-siphon system high level rod run-in instrument channel, the surveillance testing provided measurement that indicated the rod run-in actuation may not have occurred until water level was slightly greater than 6 inches above the anti-siphon isolation valves. Previously on 4/22/2021, the anti-siphon system high level rod run-in instrument channel activated the rod run-in well below the top of the anti-siphon isolation valves.
"Troubleshooting revealed the stainless-steel cable that connects the channel's level controller to its suspended displacer (float) had developed loops in it, effectively shortening the cable. The cable with loops made the rod run-in actuation occur at a higher water level than when the cable has no loops in it. The loops in the cable were removed. The instrument channel was retested and documented to be back in compliance with TS 3.2.f.6.
"On 11/9/21, MURR engineers analyzed the data collected from the 11/8/21 measurement and concluded that prior to removing the loops from the level controller cable, the rod run-in was actuating at a level of approximately 7.3 inches above the anti-siphon isolation valves, which is greater than the maximum of 6 inches above the valves required by TS 3.2.f.6.
"In accordance with TS 6.6.c(4) before it was known if MURR deviated from TS 3.2.f.6, the Acting Reactor Facility Director was briefed and gave permission to restart the reactor prior to the reactor returning to operation later on 11/8/21. Currently, MURR is operating at 10 MW. A detailed event report will follow within 14 days as required by MURR TS 6.6.c(3)."
EN Revision Text: TECHNICAL SPECIFICATION VIOLATION
"This is a required notification per University Of Missouri Research Reactor (MURR) Technical Specification (TS) 6.6.c(1) to report to the NRC Operations Center that an Abnormal Occurrence, as defined by MURR TS 1.1, had occurred. MURR was not in compliance with one Limiting Conditions of Operations (LCO). TS 3.2.f states, 'The reactor shall not be operated unless the following rod run-in functions are operable.' Specifically, the rod run-in function that occurs when water level in the anti-siphon system is greater than or equal to 6 inches above the anti-siphon isolation valves was not operable as required by TS 3.2.f.6.
"On 11/8/21 while the reactor was shut down for maintenance and conducting surveillance testing on the anti-siphon system high level rod run-in instrument channel, the surveillance testing provided measurement that indicated the rod run-in actuation may not have occurred until water level was slightly greater than 6 inches above the anti-siphon isolation valves. Previously on 4/22/2021, the anti-siphon system high level rod run-in instrument channel activated the rod run-in well below the top of the anti-siphon isolation valves.
"Troubleshooting revealed the stainless-steel cable that connects the channel's level controller to its suspended displacer (float) had developed loops in it, effectively shortening the cable. The cable with loops made the rod run-in actuation occur at a higher water level than when the cable has no loops in it. The loops in the cable were removed. The instrument channel was retested and documented to be back in compliance with TS 3.2.f.6.
"On 11/9/21, MURR engineers analyzed the data collected from the 11/8/21 measurement and concluded that prior to removing the loops from the level controller cable, the rod run-in was actuating at a level of approximately 7.3 inches above the anti-siphon isolation valves, which is greater than the maximum of 6 inches above the valves required by TS 3.2.f.6.
"In accordance with TS 6.6.c(4) before it was known if MURR deviated from TS 3.2.f.6, the Acting Reactor Facility Director was briefed and gave permission to restart the reactor prior to the reactor returning to operation later on 11/8/21. Currently, MURR is operating at 10 MW. A detailed event report will follow within 14 days as required by MURR TS 6.6.c(3)."
Power Reactor
Event Number: 55566
Facility: Fort Calhoun
Region: 4 State: NE
Unit: [1] [] []
RX Type: (1) CE
NRC Notified By: Jeff Minor
HQ OPS Officer: Kerby Scales
Region: 4 State: NE
Unit: [1] [] []
RX Type: (1) CE
NRC Notified By: Jeff Minor
HQ OPS Officer: Kerby Scales
Notification Date: 11/08/2021
Notification Time: 13:05 [ET]
Event Date: 11/08/2021
Event Time: 10:15 [CST]
Last Update Date: 11/08/2021
Notification Time: 13:05 [ET]
Event Date: 11/08/2021
Event Time: 10:15 [CST]
Last Update Date: 11/08/2021
Emergency Class: Non Emergency
10 CFR Section:
50.72(b)(2)(xi) - Offsite Notification
10 CFR Section:
50.72(b)(2)(xi) - Offsite Notification
Person (Organization):
Gaddy, Vincent (R4)
Gaddy, Vincent (R4)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Defueled | 0 | Defueled |
EN Revision Imported Date: 12/8/2021
EN Revision Text: OFFSITE NOTIFICATION
"At 1015 CST, a report was made to the State of Nebraska Department of Environment and Energy (NDEE) based on the analytical report for soil samples from the area surrounding the removed FO-10, Auxiliary Boiler Fuel Oil Storage Tank. The tank was removed as part of Fort Calhoun Station decommissioning and soil samples were tested due to historical information from a similar tank removal earlier this year (June 2021). The soil contamination levels are from the historic use of the tank. The contamination levels [of Volatile Organic Compounds] are above the lab reporting limits and thereby reportable to the State of Nebraska Department of Environment and Energy. There was no contamination noted in the groundwater samples. The NDEE will determine what, if any, remediation may be required. The state NDEE requested the District utilize their Spill Form because this is the simplest method of State notification for tanks exempted due to 40 CFR280.10(c)(4).
"No active petroleum spills are in progress and appropriate remediation actions will be taken in accordance with Nebraska State regulation and guidance."
The licensee will notify NRC Region 4 personnel.
EN Revision Text: OFFSITE NOTIFICATION
"At 1015 CST, a report was made to the State of Nebraska Department of Environment and Energy (NDEE) based on the analytical report for soil samples from the area surrounding the removed FO-10, Auxiliary Boiler Fuel Oil Storage Tank. The tank was removed as part of Fort Calhoun Station decommissioning and soil samples were tested due to historical information from a similar tank removal earlier this year (June 2021). The soil contamination levels are from the historic use of the tank. The contamination levels [of Volatile Organic Compounds] are above the lab reporting limits and thereby reportable to the State of Nebraska Department of Environment and Energy. There was no contamination noted in the groundwater samples. The NDEE will determine what, if any, remediation may be required. The state NDEE requested the District utilize their Spill Form because this is the simplest method of State notification for tanks exempted due to 40 CFR280.10(c)(4).
"No active petroleum spills are in progress and appropriate remediation actions will be taken in accordance with Nebraska State regulation and guidance."
The licensee will notify NRC Region 4 personnel.