ENS 55230

v t e 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

ENS 55230 +/-
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
v • d • e

v t e Emergency Notification System
Sterigenics Us, Llc with Agreement State
WEEKMONTHYEAR2021-05-01T08:40:00 [Table view]
[ENS list for Sterigenics Us, Llc]

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