ENS Event | |
|---|---|
08:40 May 1, 2021 | |
| Title | Electrical Fault Causes Stuck Racks |
| Event Description | The following report was received by the California Department of Public Health, Radiological Health Branch:
At approximately 0140 [PDT], the licensee received several alarms for the Cell B irradiator. An attempt to lower the source racks normally was unsuccessful. At approximately 0400 [PDT], the source racks were successfully lowered to the bottom of the pool following emergency operating procedures (EOP-034, Stuck Source Rack) for manually lowering the source rack. During this time, the irradiator entrance door remained secured by the safety system interlock system. After some review and troubleshooting, the licensee determined that there was an electrical fault in a junction box which was later determined to have been caused by a degraded wire that short circuited to ground causing the electrical malfunction. The licensee subsequently replaced this degraded wire with new components. Once repairs to the electrical system were completed and a functional safety system check of the irradiator was performed to determine that all safety systems were operating correctly, the licensee resumed operations." California NMED Report Number: 050121 |
| Where | |
|---|---|
| Sterigenics Us, Llc Corona, California (NRC Region 4) | |
| License number: | 5956 |
| Organization: | California Radiation Control Prgm |
| Reporting | |
| Agreement State | |
| Time - Person (Reporting Time:+24.5 h1.021 days <br />0.146 weeks <br />0.0336 months <br />) | |
| Opened: | Robert Greger 09:10 May 2, 2021 |
| NRC Officer: | Brian P. Smith |
| Last Updated: | May 2, 2021 |
| 55230 - NRC Website | |
Sterigenics Us, Llc with Agreement State | |
WEEKMONTHYEARENS 552302021-05-01T08:40:0001 May 2021 08:40:00
[Table view]Agreement State Electrical Fault Causes Stuck Racks ENS 512452015-07-21T07:11:00021 July 2015 07:11:00 Agreement State Agreement State Report - Source Rack Pneumatic Cylinder Failure 2021-05-01T08:40:00 | |