ENS 40194
ENS Event | |
|---|---|
18:20 Sep 23, 2003 | |
| Title | Unusual Event |
| Event Description | While in Mode 5, refueling Shutdown with Core offload in progress a fuel assembly in the Spent Fuel Pool became ungrappled. The assembly is currently sitting on the top of the Spent Fuel pool racks resting against the Pool wall at approximately 15 degrees. There is no damage to the Fuel Assembly, evident by no change in area radiation dose rates. EAL 1.14, Plant Conditions Warrant Increased Awareness By Plant Staff or Government Authorities. An investigation has begun to determine the cause of the event and a team is being assembled to plan the fuel bundle recovery.
The licensee notified the NRC Resident Inspector.
The licensee remains in a NOUE (Notice of Unusual Event) due to the ungrappled spent fuel assembly. The position of the spent fuel assembly remains the same as previously reported. No damage to the fuel assembly nor the spent fuel rack has been detected. No abnormal radiation readings have been observed. As a precaution, the licensee has suspended all fuel movement operations and evacuated the auxiliary and containment buildings. The licensee plans to stabilize the fuel assembly, attach a lifting tool, and place it into a permanent storage position in the spent fuel pool. Notified R4DO (Greg Pick)
At 12:42 CDT the fabricated stabilization device installation was completed and it is currently secured to two walls of the spent fuel pool. The plant will remain in a NOUE until the fuel assembly is lowered into a safe location in the spent fuel pool. A tool has been fabricated to grapple the fuel assembly and it will be moved with the Spent Fuel Pool Refueling Machine. The tool is currently being tested and weighed. All unnecessary personnel were moved from the Protected Area to the Administration and Training Buildings during the placement of the stabilization device. The NRC Resident Inspector was notified. Reg 4 RDO (Greg Pick) was notified
The licensee reported that the ungrappled spent fuel assembly was placed in a permanent storage position in the spent fuel pool at 1654 CDT. As a result of this action, the licensee terminated the Notice of Unusual Event (NOUE) condition at this time. Normal access to the facility protected area and radiation control area has been restored. Fuel movement operations remain suspended and a root cause investigation of this event is being conducted. The licensee notified the NRC Resident Inspector. NRC R4DO (Greg Pick), DIRO (Richard Wessman), NRR EO (Gene Imbro), FEMA (Ken Sweetser), DOE (Joe Stanbaugh), DHS (Sam Neglia) were notified by the Headquarters Operations Officer. |
| Where | |
|---|---|
Ft Calhoun  Nebraska (NRC Region 4) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-3.27 h-0.136 days <br />-0.0195 weeks <br />-0.00448 months <br />) | |
| Opened: | Randy Cade 15:04 Sep 23, 2003 |
| NRC Officer: | Eric Thomas |
| Last Updated: | Sep 24, 2003 |
| 40194 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Cold Shutdown (0 %) |
| After | Cold Shutdown (0 %) |
WEEKMONTHYEARENS 514392015-10-02T14:05:0002 October 2015 14:05:00
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