ENS 49036
ENS Event | |
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04:00 May 15, 2013 | |
Title | Missing Licensed Material |
Event Description | This is a non-emergency 30 day notification for missing licensed material. This event is reportable in accordance with 10CFR20.2201(a)(1)(ii).
On April 16, 2013, while performing the required semi-annual source leak check and inventory, Radiation Protection personnel could not locate the source label tag or cable for source RMC-0169 on radiation monitor 1EMF44H (This monitor has not been in use since 1995). The monitor's pre-amplifier box had been removed as well. 1EMH44H was inspected and the source was not found within the housing. A search was conducted for this missing source, however it could not be located. During the previous source leak check and inventory on October 4, 2012, the source was in its expected location. Source RMC-0169 is a 200 milligram depleted uranium source. The total original activity of the source was 9.998E-02 microCuries (3.03E-02 micro curies; U-234; 1.98E-03 microCuries; U-235, 6.77E-02 microCuries; U-238). The reportable limit for U-234 (the shortest-lived isotope in the source is U-234 with a half-live of 2.46E+05 years) is 0.01 microCuries per 10CFR20, Appendix C. Based on the activity of U-234 present in the source of 0.03 microCuries, this 30 day phone notification to the NRC is being provided pursuant to 10CFR22.2201(a)(1)(ii). The external dose to an individual from this source is negligible due to the small quantity and the type of material involved. Therefore, this event has no adverse effect upon the health and safety of employees or the public. The required written report pursuant to 10CFR20.2201(b)(1) will be provided to the NRC within 30 days of the telephone notification. The NRC Resident Inspector has been notified. The licensee with notify State and local authorities. 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 |
Where | |
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Catawba South Carolina (NRC Region 2) | |
Reporting | |
10 CFR 20.2201(a)(1)(ii) | |
Time - Person (Reporting Time:+11 h0.458 days <br />0.0655 weeks <br />0.0151 months <br />) | |
Opened: | Aaron Michalski 15:00 May 15, 2013 |
NRC Officer: | Vince Klco |
Last Updated: | May 15, 2013 |
49036 - NRC Website
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Unit 1 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
WEEKMONTHYEARENS 490362013-05-15T04:00:00015 May 2013 04:00:00
[Table view]10 CFR 20.2201(a)(1)(ii) Missing Licensed Material ENS 480702012-06-21T20:00:00021 June 2012 20:00:00 10 CFR 20.2201(a)(1)(ii) Two Incore Detectors Containing U-235 Unaccounted for During Inventory 2013-05-15T04:00:00 | |