ENS 51974
ENS Event | |
|---|---|
16:45 Jun 2, 2016 | |
| Title | Administrative Verifications of Ventilation Clean-Out Containers Were Not Performed |
| Event Description | Description of the Event: On June 2, 2016 at 1245 [EDT], it was reported to the Environment, Health and Safety (EH&S) department that the two administrative verifications of ventilation clean-out containers were not performed.
The Conversion Area nitric acid scrubber was scheduled for annual inspection and cleaning May 27 thru June 1. On May 18th, 25 disposable clean-out containers were obtained from the storeroom in preparation for the annual scrubber cleaning. The clean-out containers are used to collect special nuclear material (SNM) from scrubber and filter house cleanings. After obtaining new clean-out containers from the storeroom and prior to using them with SNM, one container from each lot is required to be measured by an operator to assure proper dimensions (IROFS STORAGE-GEN-126). An independent measurement by a process engineer to assure proper dimensions is also required prior to use with SNM (IROFS STORAGE-GEN-127). An additional 20 clean-out containers were obtained from the storeroom on May 31st. On June 2nd, a process engineer discovered that the measurement verifications were not performed. EH&S was notified of the event by phone and the 'Redbook' reporting system. (Redbook Issue #71225). At no time was there any actual or potential health and safety consequence to the workers, the public, or the environment. The safety function of these IROFS [Items Relied on for Safety] is to preclude using an incorrect container size. The ventilation clean-out containers are a standard stocked storeroom item. They have an approximate volume capacity of 1.5 gallons, providing a substantial safety margin to the minimum requirement of 5.7 gallons in the Criticality Safety Evaluation (CSE) which assumes an optimum uranium/water mixture and full 12-inch water reflection. The CSE also requires more than 64 close packed containers with an optimum uranium/water mixture; while the containers are limited to maximum array of 25 (IROFS STORAGE-GEN-112). Additionally, the clean-out containers remained spaced 18 inches apart at all times. Based on available IROFS, this accident sequence was unlikely, a failure probability of [10E-3], and not highly unlikely, a failure probability of [10E-4] or less. Therefore, this geometry accident sequence does not meet the performance requirements of 10CFR70.61. As stated above, the actual configuration remained safe at all times. Also, no external conditions affected the event. Immediate Corrective Actions: The clean-out container dimensions were verified as correct. This event has been entered into the facility Corrective Action Prevention And Learning system (CAPAL) #1003888517. The Licensee will notify NRC Region II. |
| Where | |
|---|---|
| Westinghouse Electric Corporation Columbia, South Carolina (NRC Region 2) | |
| License number: | SNM-1107 |
| Reporting | |
| Part 70 App A (B)(2) | |
| Time - Person (Reporting Time:+18.98 h0.791 days <br />0.113 weeks <br />0.026 months <br />) | |
| Opened: | Carl Snyder 11:44 Jun 3, 2016 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Jun 3, 2016 |
| 51974 - NRC Website | |
Westinghouse Electric Corporation with Part 70 App A (B)(2) | |
WEEKMONTHYEARENS 542982019-09-27T19:15:00027 September 2019 19:15:00
[Table view]Part 70 App A (B)(2) Procedural Noncompliance with Administrative Item Relied on for Safety ENS 519742016-06-02T16:45:0002 June 2016 16:45:00 Part 70 App A (B)(2) Administrative Verifications of Ventilation Clean-Out Containers Were Not Performed ENS 510242015-04-29T14:00:00029 April 2015 14:00:00 Part 70 App A (B)(2) Valve Classified as Item Relied on for Safety Failed to Operate as Designed ENS 459262010-05-13T16:33:00013 May 2010 16:33:00 Part 70 App A (B)(2) a Valve Classified as an Item Relied on for Safety Found Closed While Position Indicator Showed Open ENS 458842010-04-29T17:04:00029 April 2010 17:04:00 Part 70 App A (B)(2) Hot Oil System Emergency Shutdown Fails Annual Preventative Maintenance Check ENS 449282009-03-23T11:30:00023 March 2009 11:30:00 Part 70 App A (B)(2) Degraded Item Required for Safety in the Pelleting Area ENS 438142007-11-30T16:00:00030 November 2007 16:00:00 Part 70 App A (B)(2) Potential Loss of Item Relied on for Safety (Irofs) ENS 414242005-02-19T21:04:00019 February 2005 21:04:00 Part 70 App A (B)(2) 24-Hour Criticality Control Report - Failure to Obtain Required Powder Samples 2019-09-27T19:15:00 | |