ENS 40489
ENS Event | |
---|---|
17:30 Jan 30, 2004 | |
Title | Unusual Event |
Event Description | At 1151 CST, the licensee declared an Unusual Event per chart P.
At approximately 1115 CST, while filling the CARDOX carbon dioxide (CO2) storage tank, the tank had reached the full mark and the operator requested the trucker to stop filling the tank. The operator verified tank filling had stopped and isolated the fill line at the tank. The operator then isolated the fill line at the truck bay. The fill line relief valve lifted, causing the vent line to bleed CO2 through a weep hole in the tank room. At 1140 CST, the shift manager was informed that CO2 levels in the tank room were at life threatening levels (40,000 ppm at floor level, 30,000 ppm at waist level). At 1155 CST, the shift manager was informed that CO2 concentration had decreased below life threatening levels. At 1215 CST, no further leakage of CO2 through the weep hole into the room was observed. At 1245 CST, CO2 levels in the CARDOX room and adjacent spaces had returned to at or near normal levels. At 1343 EST, the NRC decided not to enter Monitoring mode. The licensee notified the NRC senior resident inspector, along with state and local authorities.
At 1346 the Unusual Event was terminated by the licensee. CO2 levels in all areas of the plant have returned to normal working levels. The CO2 release was terminated at 1239 CST. Notified P. Louden, T. McGinty, T. Reis, FEMA, DHS (D. Lewis) |
Where | |
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Kewaunee ![]() Wisconsin (NRC Region 3) | |
Reporting | |
Emergency class: | Unusual Event |
10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
Time - Person (Reporting Time:+-4.07 h-0.17 days <br />-0.0242 weeks <br />-0.00558 months <br />) | |
Opened: | Jerry Riste 13:26 Jan 30, 2004 |
NRC Officer: | Eric Thomas |
Last Updated: | Jan 30, 2004 |
40489 - NRC Website
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Unit 1 | |
---|---|
Reactor critical | Not Critical |
Scram | No |
Before | Hot Shutdown (0 %) |
After | Hot Shutdown (0 %) |
WEEKMONTHYEARENS 425302006-04-27T01:49:00027 April 2006 01:49:00
[Table view]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 Failure of Rps Signal to Initiate Reactor Trip ENS 421692005-11-25T22:24:00025 November 2005 22:24:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Dangerous Levels of Carbon Dioxide Following a Cardox Release ENS 404892004-01-30T17:30:00030 January 2004 17:30:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event 2006-04-27T01:49:00 | |