ENS 45517
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ENS Event | |
|---|---|
08:05 Nov 24, 2009 | |
| Title | Unusual Event - Reactor Coolant System Leakage Greater than 25 Gpm |
| Event Description | Beaver Valley Unit 2 declared an unusual event due to reactor coolant system unidentified leakage greater than 25 GPM into the pressurizer relief tank. Leakage occurred during shutdown of the residual heat removal system Train-A. The Train-A suction relief valve lifted due to pressure from the in-service Train-B residual heat [removal] system. The leakage has been stopped by isolating Train-A RHR from Train-B RHR. The duration of relief valve lifting was about 9 minutes. The pressurizer relief tank remained intact. All other systems functioned as designed and the plant is stable. Containment was closed at time of the event. No radioactive release occurred.
The licensee terminated the unusual event at 0404 EST. The licensee notified the NRC Resident Inspector.
Licensee clarified that the event was due to identified leakage not unidentified leakage as stated in the paragraph above. Notified R1DO. |
| Where | |
|---|---|
| Beaver Valley Pennsylvania (NRC Region 1) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-4.42 h-0.184 days <br />-0.0263 weeks <br />-0.00605 months <br />) | |
| Opened: | Dan Schwer 03:40 Nov 24, 2009 |
| NRC Officer: | Vince Klco |
| Last Updated: | Nov 24, 2009 |
| 45517 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Shutdown (0 %) |
| After | Hot Shutdown (0 %) |
Beaver Valley with 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | |
WEEKMONTHYEARENS 554132021-08-18T04:24:00018 August 2021 04:24:00
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