ENS 57174
ENS Event | |
|---|---|
16:00 Jun 14, 2024 | |
| Title | Technical Specification Reportable Occurrence |
| Event Description | The following information was provided by the licensee via email:
At approximately 1100 CDT on June 14, 2024, during routine fuel inspections required under Technical Specification 4.1.5, a fuel pin (serial number 11420) did not pass the go/no-go test for transverse bend. This measurement is described in Technical Specification 3.1.5.2.a as part of the fuel inspection conducted under the surveillance described in Technical Specification 4.1.5. Failure of an element to meet any one of the specifications listed in Technical Specification 3.1.5.2 specifies that the fuel element is considered 'damaged' and therefore may not be used in reactor operations. Visual inspection of the pin prior to placement in the test rig did not indicate any obvious degradation that would be exceptional for a pin with seventeen years of burnup history. There have been no indications of cladding failure on routine primary coolant analyses. The pin has been removed from service and will be replaced with a spare unused element. As required by Technical Specification 4.1.5.2, an inspection of the entire core fuel inventory will be initiated and will be completed prior to resuming routine operations. After the identification of the failure, the test rig calibration was confirmed and the pin was checked again, confirming the element failed the transverse bend specification. The reactor was not operating at the time of the event. NRC Project Manager has been notified.
The following information was provided by the licensee via email: During the Technical Specification (TS) 4.1.5.2 required inspection of the entire core resulting from the finding detailed above, an additional element [SN 11391] failed to pass the inspection for transverse bend on Friday, June 21, 2024, requiring that element to be declared as 'damaged' in accordance with TS 3.1.5.2 (same as above). As this meets the definition of a 'reportable occurrence' under the definitions in TS 1.3. In accordance with the requirements of TS 6.6.2 and 6.7.2, we have hereby notified the HOO [Headquarters Operations Officer] by a revision or update of the previous report of damaged fuel, Event Number 57174. Additional details: 1. Visual inspection of the pin prior to placement in the test rig did not indicate any obvious degradation that would be exceptional for a pin with seventeen years of burnup history. 2. There have been no indications of cladding failure on routine primary coolant analyses. 3. The pin (SN 11391) has been removed from service and will be replaced with a spare element. 4. We have also informed our project managers. 5. The inspection of the remaining uninspected elements is almost complete, as of this writing no further "damaged" elements have been identified. Notified NRR PM (Boyle), NPR Event Coordinator (Waugh) |
| Where | |
|---|---|
| Texas A&Amp;M University (Tamn) College Station, Texas (NRC Region 0) | |
| License number: | R-83 |
| Reporting | |
| Non | |
| Time - Person (Reporting Time:+-0.42 h-0.0175 days <br />-0.0025 weeks <br />-5.75316e-4 months <br />) | |
| Opened: | Jere Jenkins 15:35 Jun 14, 2024 |
| NRC Officer: | Josue Ramirez |
| Last Updated: | Jun 25, 2024 |
| 57174 - NRC Website | |
with Non | |
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