ENS 44602
ENS Event | |
|---|---|
08:03 Oct 27, 2008 | |
| Title | Unusual Event Declared Due to Explosion in the Protected Area |
| Event Description | Quad Cities Station has declared an Unusual Event under EAL HU6 due to an explosion in the protected area. The radwaste floor drain surge tank building has physical damage after reports of an explosion in the area. The building is located outside the vital area West of the Turbine building. There are no reports of fire in the area. First responders are on the scene and assessing the situation. This event is being reported under 10 CFR 50.72.(a).
The licensee stated that there were no injuries or release of radioactive material and no impact on the reactors. The damage was to block structure of the radwaste floor drain surge tank building but the radwaste tank itself was not impacted. The cause of the explosion is still unknown but appears to be related to a buildup of some kind of hydrocarbon gas. No offsite assistance from the fire department has been requested by the licensee. The explosion was reported to occur at 0242 CDT. The States of Illinois and Iowa have been notified. The licensee has also notified local authorities and will notify the NRC Resident Inspector.
Unusual Event - Termination This is an update to EN #44602. On October 27, 2008, at 0303 hours0.00351 days <br />0.0842 hours <br />5.009921e-4 weeks <br />1.152915e-4 months <br /> CDT, Quad Cities declared an Unusual Event under EAL HU6 due to an explosion in the protected area. The radwaste floor drain surge tank building incurred physical damage. A walkdown of the area confirmed that the explosion had no impact on any safety related structures or components. There were no injuries. The combustible atmosphere in the surge tank building has been attributed to the accumulation of methane gas, which originated in the surge tank. Actions have been initiated to purge and monitor the surge tank atmosphere to ensure conditions will not deteriorate. Conditions no longer meet an emergency action level, the event was terminated at 1530 CDT hours on October 28, 2008. A press release will be issued on the termination of the Unusual Event. The licensee has notified the NRC Resident Inspector, Illinois EMA, Illinois REAC, Iowa EMD, Scott County - Iowa, and Clinton County - Iowa. Notified R3RA (Caldwell), R3DO (Kozak), NRR EO (Skeen), IRD (Gott). DHS (Hill), and FEMA (Blankenship). |
| Where | |
|---|---|
Quad Cities  Illinois (NRC Region 3) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-3.25 h-0.135 days <br />-0.0193 weeks <br />-0.00445 months <br />) | |
| Opened: | Jeff Kopacz 04:48 Oct 27, 2008 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Oct 28, 2008 |
| 44602 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (98 %) |
| After | Power Operation (97 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (97 %) |
| After | Power Operation (97 %) |
WEEKMONTHYEARENS 525272017-02-02T01:38:0002 February 2017 01:38:00
[Table view]10 CFR 50.72(a)(1)(i), Emergency Class Declaration Alert - Fire in Safety Related System ENS 499882014-04-02T18:40:0002 April 2014 18:40:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Alert Declared Due to Fire in Unit 2 Turbine Building ENS 459352010-05-19T18:30:00019 May 2010 18:30:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Potentially Toxic Atmosphere in an Access Faciliity ENS 446022008-10-27T08:03:00027 October 2008 08:03:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Explosion in the Protected Area ENS 408462004-06-28T06:47:00028 June 2004 06:47:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Earthquake Felt at the Site 2017-02-02T01:38:00 | |