The State provided the following information via facsimile:
Fire broke out in the Coker 1 unit at Citgo. The FA201A and 201B vessel structures (24,000 cu. Ft.) holding Coker feed (heavy black oil) product were impacted by the fire / heat from fire. Each of the above-mentioned vessels have three nuclear gauges (Am-241 / Be, 500mCi activity) attached in linear formation to them. The gauges are used for product level measurements. Three of the six total number of gauges sustained fire / heat from fire that impacted the functioning of the housing of devices, specifically the shutters. According to Citgo licensee:
1) Of the three shutters impacted, two cannot be closed (and therefore, unlocked) and remain open as they usually are during regular production, the third could be closed but not locked.
2) All six gauges are scheduled to be removed by the manufacturer for maintenance, repair, etc. as needed.
3) The gauges are Kay-Ray (Thermo Measure Tech) brands.
4) The three
gauges with functional impact are:
Gauge Housing - all are model number 7100B; Sealed Source model number MRL2723C and serial numbers -- 17235, 26053, and S95M2201.