On June 13, 2013, the licensee notified the Agency [State of Texas] that after completing maintenance on cables on Hoppers that one of the retest was to operate shutters on all nuclear
gauges. The failures were identified on June 12, 2013. Eight
gauge shutters failed to operate. The shutters are on Thermo Fisher Model #5197
gauges each containing 100 mCi of
Cesium-137. The licensee stated that open is the normal operating position for the shutter and the
gauge does not pose an exposure risk to any individual. The sources are not accessible to the general public or workers in the area. The licensee stated that a service provider will most likely remove and possible replace the
gauges. The
gauges have been in operation for approximately 30 years. Additional information will be provided as it is received in accordance with
SA 300.
Texas Incident # I-9091