ENS 45195
From kanterella
Jump to navigation
Jump to search
ENS Event | |
|---|---|
01:00 Jul 11, 2009 | |
| Title | Unplanned Contamination Event Requiring Additional Radiological Controls (Respirators) for More than 24 Hours |
| Event Description | An unplanned contamination event occurred on 10 July 2009. This is a reportable event in accordance with 10CFR40.60 sub paragraph (1) based on an unplanned event that resulted in additional radiological controls being required for more than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period ended at 2000 CDT on 11 July 2009 (the reported event). The additional control imposed was the wearing of air purifying respirators on the fourth floor of the Feed Materials Building. The location of the event was the Feed Materials Building fourth floor. The Feed Materials Building converts milled uranium oxide material to uranium hexafluoride by using a dry process. Air samples from the fourth floor were analyzed and the airborne radioactivity averaged approximately 6.11E-11 microcuries/ml. The airborne contaminant was natural uranium ore concentrate and the physical form is a light microscopic dust. The processes in the area of elevated levels of airborne radioactivity have been secured and potential leakage paths are being investigated.
The licensee will notify NRC Region II. HOO Note: See similar Event Number 44857, 44871, 45058, and 45163.
The isotope responsible for the increased controls was natural uranium in the chemical form of uranium tetraflouride (UF4); green salt. The amount of unplanned contamination that was released in the form of green salt was estimated to exceed 5 times the ALI [Annual Limit on Intake] (3 grams). The airborne activity averaged approximately 6.11E-11 microCuries/ml. (5.0E-11 microCuries/ml is 30% of 1 DAC [Derived Air Concentration]). The licensee states that bioassay sampling of any potentially exposed individuals will be performed within the routine sampling frequency, but prior to 7/30/09. The licensee has notified NRC Region II. Notified R2DO (O'Donohue) and NMSS EO (Kotzalas). |
| Where | |
|---|---|
| Honeywell International, Inc. Metropolis, Illinois (NRC Region 2) | |
| License number: | SUB-526 |
| Reporting | |
| 10 CFR 40.60(b)(1) | |
| Time - Person (Reporting Time:+23.13 h0.964 days <br />0.138 weeks <br />0.0317 months <br />) | |
| Opened: | Michael Greeno 00:08 Jul 12, 2009 |
| NRC Officer: | Donald Norwood |
| Last Updated: | Jul 14, 2009 |
| 45195 - NRC Website | |
Honeywell International, Inc. with 10 CFR 40.60(b)(1) | |
WEEKMONTHYEARENS 451952009-07-11T01:00:00011 July 2009 01:00:00
[Table view]10 CFR 40.60(b)(1) Unplanned Contamination Event Requiring Additional Radiological Controls (Respirators) for More than 24 Hours ENS 451632009-06-24T15:45:00024 June 2009 15:45:00 10 CFR 40.60(b)(1) Access Restriction Due to Unplanned Contamination ENS 450582009-05-11T16:30:00011 May 2009 16:30:00 10 CFR 40.60(b)(1) Multiple Failures to Meet 24 Hour Reporting Criteria ENS 449392009-03-24T18:30:00024 March 2009 18:30:00 10 CFR 40.60(b)(1) Building Contaminated During Maintenance ENS 448712009-02-23T16:30:00023 February 2009 16:30:00 10 CFR 40.60(b)(1) Airborne Contamination Over the Limit in the Feed Materials Building ENS 448572009-02-16T16:30:00016 February 2009 16:30:00 10 CFR 40.60(b)(1) 24-Hour Report Involving an Unplanned Contamination Event ENS 444442008-08-27T15:00:00027 August 2008 15:00:00 10 CFR 40.60(b)(1) Unplanned Contamination Event ENS 419772005-09-09T15:00:0009 September 2005 15:00:00 10 CFR 40.60(b)(1) Unplanned Contamination Event ENS 418792005-07-25T14:18:00025 July 2005 14:18:00 10 CFR 40.60(b)(1) Unplanned Contamination Event Due to Filter Failure 2009-07-11T01:00:00 | |
Retrieved from "https://kanterella.com/w/index.php?title=ENS_45195&oldid=1183868"