ENS 55930
ENS Event | |
|---|---|
01:00 Jun 8, 2022 | |
| Title | UF6 Leakage Inside Autoclave |
| Event Description | The following information was provided by the licensee via email:
The plant is in a safe configuration. On June 3, 2022, isolated pressure fall (IPF) and isolated pressure rise (IPR) tests were completed satisfactory on manifold 1. A satisfactory Item Relied on For Safety [IROFS] surveillance was completed for manifold 1 and 1003 Autoclave was placed in service. On June 7, 2022 during the disconnect of 1003 Autoclave, an Operator noticed a white/yellowish film on the hex nut of the manifold and the upper portion of the cylinder valve. The Operator surveyed the film and found 4,000 to 6,000 dpm alpha and beta contamination. Prior to opening the door of 1003 Autoclave, the internal atmosphere was sampled for hydrogen fluoride (HF). No HF was detected by HF monitor. 1003 Autoclave has been taken out of service. Autoclave sampling manifold 1 has been isolated and IROFS 28 declared INOPERABLE. The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance: No employee exposures occurred. The leakage was contained inside the autoclave.
The following was provided by the licensee via email: The IROFS28 boundary, components, associated accident sequences and manifold leak were evaluated by Urenco-USA (UUSA) engineering. The evaluation determined that the leakage from the manifold did not result in IROFS28 being inoperable. IROFS28 was determined to be operable during this event. Based on this reevaluation, UUSA is retracting event notification EN 55930. UUSA will be notifying Region II. Notified R2DO (Miller), and NMSS (Clark), NMSS Day (Rivera-Capella), NMSS Events (email). |
| Where | |
|---|---|
| Louisiana Energy Services Eunice, New Mexico (NRC Region 2) | |
| License number: | SNM-2010 |
| Reporting | |
| Part 70 App A (A)(4) | |
| Time - Person (Reporting Time:+-3.17 h-0.132 days <br />-0.0189 weeks <br />-0.00434 months <br />) | |
| Opened: | Michael Bolling 21:50 Jun 7, 2022 |
| NRC Officer: | Brian Lin |
| Last Updated: | Jun 10, 2022 |
| 55930 - NRC Website | |
Louisiana Energy Services with Part 70 App A (A)(4) | |
WEEKMONTHYEARENS 570612024-04-02T05:45:0002 April 2024 05:45:00
[Table view]Part 70 App A (A)(4) Item Relied on for Safety (Irofs) Inoperable ENS 563022023-01-05T21:45:0005 January 2023 21:45:00 Part 70 App A (A)(4) Safety Item Unavailable ENS 559302022-06-08T01:00:0008 June 2022 01:00:00 Part 70 App A (A)(4) UF6 Leakage Inside Autoclave ENS 557702022-03-07T17:45:0007 March 2022 17:45:00 Part 70 App A (A)(4) Item Relied on for Safety (IROFS) Inoperable ENS 544922020-01-22T23:23:00022 January 2020 23:23:00 Part 70 App A (A)(4) Required Procedural Controls Were Not Followed ENS 528862017-08-03T21:00:0003 August 2017 21:00:00 Part 70 App A (A)(4) Administrative Criticality Controls Not Used ENS 517762016-03-07T23:15:0007 March 2016 23:15:00 Part 70 App A (A)(4) Administrative Items Relied on for Safety (Irofs) Not Performed ENS 500232013-09-10T21:05:00010 September 2013 21:05:00 Part 70 App A (A)(4) Uf6 Present in the Small Component Decontamination Train 2024-04-02T05:45:00 | |