ENS 44380
ENS Event | |
|---|---|
08:52 Aug 3, 2008 | |
| Title | Unusual Event - Hydrazine Leak in Non-Vital Area of the Turbine Building |
| Event Description | A hydrazine leak has occurred in the Unit 1 Turbine Building sump area approaching levels (IDLH) Immediately Dangerous to Life and Health. An NUE was declared @ 0352 CST. At this point, the leak is not within or contiguous to any vital areas. The area has been evacuated, accountability is complete, and no injuries have resulted due to the leak.
The leak is ongoing in the area of the condensate and heater drain pumps. The licensee stopped adding hydrazine to the condensate at 1800 CDT on 8/2/2008. The licensee notified the NRC Resident Inspector
Licensee terminated from Unusual Event EAL HU3.1, Release of Toxic or flammable gases deemed detrimental to normal operation of the plant at 2220 hours0.0257 days <br />0.617 hours <br />0.00367 weeks <br />8.4471e-4 months <br /> CDT. Criteria used to exit - Three (3) consecutive air samples had less than detectable limits of hydrazine for the entire area. No press release scheduled. Current plant condition - Mode 1, 100% power. Licensee notified NRC Resident Inspector, State, Local, and tribal authorities. Notified NRR EO (Samson Lee), IRD (McDermott), R3DO (Pelke), DHS (Frost), and FEMA (LaForty).
At 2345 CDT on 08/03/08, the licensee issued a press release for the termination of the NUE and the return to full power of Prairie Island Unit 1. The licensee notified the NRC Resident Inspector, the state, and local emergency response organizations. Notified the R3DO (Pelke). |
| Where | |
|---|---|
Prairie Island  Minnesota (NRC Region 3) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-3.38 h-0.141 days <br />-0.0201 weeks <br />-0.00463 months <br />) | |
| Opened: | Doug Laramer 05:29 Aug 3, 2008 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Aug 4, 2008 |
| 44380 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (28 %) |
| After | Power Operation (28 %) |
WEEKMONTHYEARENS 565432023-05-27T23:34:00027 May 2023 23:34:00
[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 Notification of Unusual Event Due to Multiple Fire Alarms in Containment Not Verified within 15 Minutes ENS 521782016-08-14T04:59:00014 August 2016 04:59:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Excessive Reactor Coolant System Leakage ENS 516092015-12-17T19:18:00017 December 2015 19:18:00 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 Unusual Event Declared Due to Fire Alarm in Containment Not Verified within 15 Minutes ENS 508662015-03-05T10:06:0005 March 2015 10:06:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unit 2 Declares Unusual Event Due to Inability to Validate a Containment Fire Alarm within 15 Minutes ENS 484642012-10-31T19:18:00031 October 2012 19:18:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notice of Unusual Event Due to Security Condition ENS 477202012-03-06T12:24:0006 March 2012 12:24:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of Unusual Event Due to Unidentified Rcs Leakage Greater than 10 Gpm ENS 475692012-01-05T09:53:0005 January 2012 09:53:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Sodium Hypochlorite Leak Resulted in Airborne Concentrations Potentially Dangerous to Life and Health ENS 443802008-08-03T08:52:0003 August 2008 08:52:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event - Hydrazine Leak in Non-Vital Area of the Turbine Building 2023-05-27T23:34:00 | |