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| Entered date | Event description | |
|---|---|---|
| ENS 57170 | 11 June 2024 17:52:00 | The following information was provided by the California Department of Public Health (the Department) via email: At 1034 PDT on June 6, 2024, the Department received an email from the Mistras Group, notifying the Department of an event at the MRC Martinez Refinery. At 1407 PDT on June 3, 2024, the radiation safety officer (RSO) received a call from a radiography crew at MRC Martinez Refinery regarding a 61 curie Ir-192 source (serial number 475 I) that would not retract back into the industrial nuclear IR-100 radiographic exposure device (serial number 4059). The RSO arrived on the site at 1444 PDT to find that the extension tube female end crimp had dislodged from the tubing and was laying on the deck of the structure that the crew was working on. At 1555 PDT, the RSO was able to manipulate the cable into a position where they were able to retract the source back into the locked and shielded position without incident or overexposure. Five crew members were present during the time the source was in an unshielded position: the RSO, one radiographer trainer, and three assistants. The highest exposure recorded to their instadose (dosimeter) was 40 mR for the radiographer trainer. The RSO will submit a written report within 30 days following an investigation. California 5010 report number: 060424 |