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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 48535 | 26 November 2012 14:30:00 | 10 CFR 30.50(b)(2) | Process Instrument Shutter Failure | During a routine semiannual periodic inspection, a process gauge with a 15 milliCurie Cs-137 source was identified to have a stuck shutter. The gauge was an Ohmart Model SHF1-A45, S/N 0923GK. The instrument is permanently installed on a distillation column about 30 - 35 ft. from the ground. The integrity of the gauge is fine. Surveys indicated that radiation levels surrounding the gauge were less than 1 millirem per hour. The same issue involving this specific gauge was reported previously in EN #46913. The licensee plans on having the gauge repaired by the manufacturer. | ||
| ENS 48335 | 22 September 2012 02:30:00 | 10 CFR 30.50(b)(2) | Density Gauge Shutter Failure | A density gauge with a 4 milliCurie Cs-137 source was identified to have a stuck shutter. The gauge is an Ohmart Vega Model SHF1A-0, S/N 0964CO, and is permanently installed on a process line in an isolated tower area. This event did not result in exposure to any personnel. The licensee barricaded the area, which read less than 1mR/hr. The licensee plans on having the gauge repaired by the manufacturer. | ||
| ENS 47958 | 24 May 2012 18:00:00 | 10 CFR 30.50(b)(2) | Density Gauge Shutter Failure | During a routine bi-annual periodic inspection, a density gauge with a 4 milliCurie Cs-137 source was identified to have a stuck shutter. The gauge was an Ohmart Vega Model SHF1-A, S/N 0964C0. The instrument is permanently installed in an isolated tower area, and this event did not result in exposure to any personnel. The licensee plans on having the gauge repaired by the manufacturer. The licensee notified R3 (Bramnik). THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf | ||
| ENS 46913 | 31 May 2011 21:00:00 | 10 CFR 30.50(b)(2) | Process Instrument Shutter Failure | During a routine semiannual periodic inspection, a process gauge with a 15 milliCurie Cs-137 source was identified to have a stuck shutter. The gauge was an Ohmart Model SHF1-A45, S/N 09236K. The instrument is permanently installed on a distillation column about 30 - 35 ft. from the ground. The integrity of the gauge is fine. Surveys indicated that radiation levels surrounding the gauge were less than 1 millirem per hour. The licensee plans on having the gauge repaired by the manufacturer. |