The following information was provided by the
South Carolina Department of Environmental Services (the Department) via phone and email:
During a routine inspection conducted by the Department on December 3, 2024, inspection and maintenance records indicated that a float switch for a panoramic pool irradiator had failed on August 13, 2024. Between December 3, 2024, and December 13, 2024, the licensee evaluated the event for reporting applicability. On December 13, 2024, the licensee reported the event to the Department. The licensee is reporting that the float switch on a Nordion (model JS8900) continuous panoramic pool irradiator (serial number IR97) failed on August 13, 2024, during routine maintenance and inspection checks. The float switch was replaced on August 13, 2024. Specifically, the float did not operate the full length to the hard stop. The licensee is reporting no current health and safety concerns. This event is under investigation by the Department.
The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:
The float switch alarms radiation workers of low water levels which would result in higher radiation levels.
- * * UPDATE ON 01/09/25 AT 0806 EST FROM A GAUSE TO K COTTON * * *
The following information was provided by the South Carolina Department of Environmental Services (the Department) via email:
The licensee submitted a 30-day written report on December 29, 2024. The details of the 30-day written report were consistent with the initial reports. The licensee reported that the cause of the event to be attributed to the wiring harness securing nut being loose, allowing the wiring harness to move which could have caused the low water wire to move out of the intended position. The licensee reported that the new float switch assemble was sealed with an epoxy at the top to ensure that the wiring harness does not move out of position. The licensee's corrective actions included replacing the pool water float assembly and ensuring that all future pool water float assemblies are sealed with epoxy to ensure that wiring does not move from the tested position.
This event/investigation is considered closed.
Notified RDO1(Dimitriadis); NMSS_EVENTS_NOTIFICATION