Semantic search
Jump to navigation
Jump to search
| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 55234 | 4 May 2021 06:00:00 | Agreement State | Nuclear Gauge Shutter Arm Failure | The following was received from the Texas Department of State Health Services (the Agency) by email: On May 5, 2021, the Agency was notified by the licensee that while performing fracking operations at a well site, the shutter operating arm roll pin fell out of a Berthold model 8010 nuclear gauge. The gauge contains a 20 milliCurie cesium - 137 source. The licensee was able to close the shutter. The licensee stated that the gauge roll pin had previously failed in November of 2020 (EN 54992). The licensee stated they had been experiencing problems with the gauge roll pins after changing the position of the gauge during operation making it closer to the pump and exposing it to greater vibration. This was the fourth event reported by the licensee since November 2020. The licensee stated that they have begun changing the location of the gauge by moving it further from the pump and therefore exposing it to less vibration. The licensee stated that they had discussed the current location with the manufacturer and was told by the manufacturer that the gauge should not be affected. The roll pin is 5/32 inches in diameter and is friction fitted into the operating rod and held in place by friction. No exposures occurred due to this event. Additional information will be provided as it is received in accordance with SA-300. Texas Incident No.: I-9846 |