ENS 56484
ENS Event | |
|---|---|
19:45 Apr 21, 2023 | |
| Title | Item Relied on for Safety (IROFS) Not Established |
| Event Description | The following information was provided by the licensee via email:
The plant is in a safe condition. On April 21, 2023, Urenco, USA (UUSA) was staging a construction crane to be used the following week and failed to maintain procedural compliance while implementing IROFS50f and IROFS50g. The crane was properly permitted and placed inside the Controlled Access Area but was not properly permitted for operation. At all times the required spotters for IROFS50f and IROFS50g were in place and the movement of the crane was sufficiently controlled to restrict its movement to not swing into an area where damage could occur. However, visual indicators (reference markers) were not established as required by procedure. Spotters were in place and exercised appropriate control. IROFS50f/g are independent, administrative IROFS that prevent heavy vehicles from damaging equipment that could result in a UF6 release. Both IROFS are required to meet the performance requirement of 10 CFR 70.61. Work has been stopped and the crane has been demobilized. UUSA is conservatively reporting this event under 10 CFR 70 Appendix A (a)(4). The licensee will notify Region 2.
This issue has been entered into the corrective actions program as EV 160170. Following a more detailed review, IROFS50g was determined to be operable and adequately implemented. As a result, the appropriate reporting criteria is being changed to 10 CFR 70 Appendix A (b)(2). Notified R2DO (Miller) and NMSS Events Notification (email).
2nd Update: The operation of the crane has stopped and it remains south of SBM 1001. Contrary to the initial report, the required spotters were not present and controlling the movement of the boom. As a result, IROFS50f/g have been determined not to be available and reliable. The appropriate reporting criteria is being changed to 10 CFR 70 Appendix A (a)(4). The stop work involving the use of construction vehicles and IROFS50 remains in place. All work performed by site projects has been stopped. The licensee has notified Region 2. Notified R2DO (Miller) and NMSS Events Notification (email). |
| Where | |
|---|---|
| Louisiana Energy Services Eunice, New Mexico (NRC Region 2) | |
| License number: | SNM-2010 |
| Reporting | |
| Part 70 App A (B)(2) | |
| Time - Person (Reporting Time:+-3.35 h-0.14 days <br />-0.0199 weeks <br />-0.00459 months <br />) | |
| Opened: | Jim Rickman 16:24 Apr 21, 2023 |
| NRC Officer: | Bill Gott |
| Last Updated: | Apr 25, 2023 |
| 56484 - NRC Website | |
Louisiana Energy Services with Part 70 App A (B)(2) | |
WEEKMONTHYEARENS 564842023-04-21T19:45:00021 April 2023 19:45:00
[Table view]Part 70 App A (B)(2) Item Relied on for Safety (IROFS) Not Established ENS 559562022-06-21T15:00:00021 June 2022 15:00:00 Part 70 App A (B)(2) Loss of an Item Relied on for Safety ENS 538692019-02-11T22:19:00011 February 2019 22:19:00 Part 70 App A (B)(2) En Revision Imported Date 3/8/2019 ENS 543242018-06-06T16:30:0006 June 2018 16:30:00 Part 70 App A (B)(2) Pressure Instrument Isolation Valve Found in Incorrect Open Position 2023-04-21T19:45:00 | |