ENS 47111
ENS Event | |
|---|---|
15:30 Jul 31, 2011 | |
| Title | Unplanned Contamination Area |
| Event Description | {{#Wiki_filter:On 07/31/11 a water leak was found coming through the C-310 North NaF (Sodium Fluoride) trap room ceiling. The leak was coming from a steam condensate header located over the trap room. The leak had created a puddle, approximately 8' by 6', in the trap room. The area was checked by Health Physics and the spill area in the trap room was upgraded to a Contamination Areas at 1030 [CDT]. The condensate water is not contaminated but is spreading contamination from a contamination area above the ceiling. Decontamination of the trap room has been performed; however, due to a small amount of water that continues to leak into the area the area is being recontaminated. Access to the area has been restricted with the contamination area requirements for more than 24 hours.
This event is reportable as a 24 hour event in accordance with 10 CFR 76.120(c)(1)(i) 'An unplanned contamination event that: Requires access to the contaminated area, by workers or the public, to be restricted for more than 24 hours by imposing additional radiological controls or by prohibiting entry into the area.' The NRC Senior Resident Inspector has been notified of this event. PGDP Problem Report No. ATRC�11-1944: PGDP Event Report No. PAD-2011-12.
Once the floor was decontaminated and down posted, which was within the 24-hour limit, a Nuclear Criticality Safety (NCS) approved 5.5 gallon container was placed on the floor to contain the continuing leak. Due to the fact that the water dripping into the container was contaminated, the container was posted as a contamination area. The above statement that the area was being recontaminated by a small amount of water that continued to leak is referring to the water dripping into the bucket. A review of the sequence of actions to contain the water leak and decontaminate the area resulted in the conclusion that the contaminated area was down posted within the 24-hour limit. The fact that the NCS approved 5.5 gallon container placed on the floor to contain the leak was posted as a contamination area is not considered a continuation of the spread of contamination event. The spread of contamination onto the floor had been stopped and the floor decontaminated. With the leak contained, the floor decontaminated, and returned to the radiological control level that existed prior to the leak within the 24-hour limit, the event notification was not required. Thus, the notification is being retracted. The licensee has notified the NRC Resident Inspector. Notified R2DO (Hopper) and NMSS EO (Hiltz). }}[[Event description::Description::{{#Regex_clear:On 07/31/11 a water leak was found coming through the C-310 North NaF (Sodium Fluoride) trap room ceiling. The leak was coming from a steam condensate header located over the trap room. The leak had created a puddle, approximately 8' by 6', in the trap room. The area was checked by Health Physics and the spill area in the trap room was upgraded to a Contamination Areas at 1030 [CDT]. The condensate water is not contaminated but is spreading contamination from a contamination area above the ceiling. Decontamination of the trap room has been performed; however, due to a small amount of water that continues to leak into the area the area is being recontaminated. Access to the area has been restricted with the contamination area requirements for more than 24 hours. This event is reportable as a 24 hour event in accordance with 10 CFR 76.120(c)(1)(i) 'An unplanned contamination event that: Requires access to the contaminated area, by workers or the public, to be restricted for more than 24 hours by imposing additional radiological controls or by prohibiting entry into the area.' The NRC Senior Resident Inspector has been notified of this event. PGDP Problem Report No. ATRC�11-1944: PGDP Event Report No. PAD-2011-12.
Once the floor was decontaminated and down posted, which was within the 24-hour limit, a Nuclear Criticality Safety (NCS) approved 5.5 gallon container was placed on the floor to contain the continuing leak. Due to the fact that the water dripping into the container was contaminated, the container was posted as a contamination area. The above statement that the area was being recontaminated by a small amount of water that continued to leak is referring to the water dripping into the bucket. A review of the sequence of actions to contain the water leak and decontaminate the area resulted in the conclusion that the contaminated area was down posted within the 24-hour limit. The fact that the NCS approved 5.5 gallon container placed on the floor to contain the leak was posted as a contamination area is not considered a continuation of the spread of contamination event. The spread of contamination onto the floor had been stopped and the floor decontaminated. With the leak contained, the floor decontaminated, and returned to the radiological control level that existed prior to the leak within the 24-hour limit, the event notification was not required. Thus, the notification is being retracted. The licensee has notified the NRC Resident Inspector. Notified R2DO (Hopper) and NMSS EO (Hiltz). }}| ]] |
| Where | |
|---|---|
| Paducah Gaseous Diffusion Plant Paducah, Kentucky (NRC Region 2) | |
| License number: | GDP-1 |
| Reporting | |
| 10 CFR 76.120(c)(1) | |
| Time - Person (Reporting Time:+19.95 h0.831 days <br />0.119 weeks <br />0.0273 months <br />) | |
| Opened: | Billy Wallace 11:27 Aug 1, 2011 |
| NRC Officer: | Joe O'Hara |
| Last Updated: | Aug 11, 2011 |
| 47111 - NRC Website | |
Paducah Gaseous Diffusion Plant with 10 CFR 76.120(c)(1) | |
WEEKMONTHYEARENS 492332013-08-02T14:32:0002 August 2013 14:32:00
[Table view]10 CFR 76.120(c)(1) Contamination Found in Process Building ENS 491652013-06-28T19:09:00028 June 2013 19:09:00 10 CFR 76.120(c)(1) Unplanned Contamination Event That Restricted Access for Greater than 24 Hours ENS 489902013-04-30T18:20:00030 April 2013 18:20:00 10 CFR 76.120(c)(1) Area Access Restricted for More than 24 Hours Due to Increased Radiological Controls ENS 471112011-07-31T15:30:00031 July 2011 15:30:00 10 CFR 76.120(c)(1) Unplanned Contamination Area ENS 454132009-10-04T20:00:0004 October 2009 20:00:00 10 CFR 76.120(c)(1) Unplanned Contamination During Startup ENS 438642007-12-23T09:58:00023 December 2007 09:58:00 Other Unspec Reqmnt, 10 CFR 76.120(c)(1) Small Uf6 Process Leak ENS 438292007-12-07T02:44:0007 December 2007 02:44:00 Other Unspec Reqmnt, 10 CFR 76.120(c)(1) Unplanned Safety System Actuation and Contamination Event ENS 438282007-12-06T21:50:0006 December 2007 21:50:00 Other Unspec Reqmnt, 10 CFR 76.120(c)(1) Unplanned Safety System Actuation and Contamination Event 2013-08-02T14:32:00 | |