ENS Event | |
|---|---|
17:37 Dec 27, 2006 | |
| Title | Declared Unusual Event Due to Unidentified Reactor Coolant Leakage Greater than Tech Spec Limit |
| Event Description | Reactor Coolant level and pressure are stable in capacity of normal charging. Reactor Coolant leakage rapidly increased. Large input to Reactor Coolant Drain Tank. Leak diagnostic in progress. Secured 1B NCP [ Reactor Coolant Pump] due to low standpipe level. Leak data to be provided on follow up notification.
The NRC Resident Inspector, State, and local Officials were notified of this event by the licensee.
Reactor coolant leak appears to be isolated. Operators entered containment and found the reactor coolant system "C" loop low point drain valve partially open. The operators closed the valve and isolated the reactor coolant leak. The licensee is in EAL 4.2.U.4. The licensee notified the NRC Resident Inspector. R2DO (Landis), NRR EO (MJ Ross-Lee), and IRD Manager (J. Cruz)
The licensee reports they have exited the unusual event at 1600 on 12/27/06 due to the leak being terminated. The licensee notified the NRC Resident Inspector. R2DO (Landis), NRR EO (MJ Ross-Lee), IRD Manager (J. Cruz), FEMA(Eaches), and DHS(J. Craig) |
| Where | |
|---|---|
Catawba  South Carolina (NRC Region 2) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-4.35 h-0.181 days <br />-0.0259 weeks <br />-0.00596 months <br />) | |
| Opened: | R. Edmond 13:16 Dec 27, 2006 |
| NRC Officer: | John Mackinnon |
| Last Updated: | Dec 27, 2006 |
| 43066 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Standby (0 %) |
| After | Hot Standby (0 %) |
WEEKMONTHYEARENS 478052012-04-05T00:03:0005 April 2012 00:03:00
[Table view]10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notice of Unusual Event Due to Dual Unit Loss of Offsite Power ENS 430662006-12-27T17:37:00027 December 2006 17:37:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Declared Unusual Event Due to Unidentified Reactor Coolant Leakage Greater than Tech Spec Limit ENS 425922006-05-20T18:21:00020 May 2006 18:21:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event - Reactor Trip of Both Units Due to Loss of All Offsite Power 2012-04-05T00:03:00 | |