ENS Event | |
|---|---|
01:10 Sep 9, 2009 | |
| Title | Reactor Shutdown Required by Technical Specifications Due to an Unisolable Leak in a Core Spray Minimum Flow Line |
| Event Description | On September 8, 2009, during performance of quarterly Core Spray (CS) system flow rate testing, a pinhole leak was identified in the 1B Core Spray Minimum Flow Line. The pinhole leak is located just downstream of the 1B CS minimum flow valve (1-1402-38B) and cannot be isolated from primary containment.
At 1935, hours it was determined that structural integrity of the piping could not be assured. Technical Specification 3.6.1.1, Required Action B.1, was entered and a plant shutdown was initiated at 2010 hours0.0233 days <br />0.558 hours <br />0.00332 weeks <br />7.64805e-4 months <br />. In addition, the 1B Core Spray system was declared inoperable. All other ECCS systems remain operable. The NRC Resident Inspector has been notified. This event is being reported under 50.72(b)(2)(i) due to the initiation of a shutdown required by the plant's Technical Specifications. The licensee estimates reactor shutdown will be achieved at 0130 CDT. |
| Where | |
|---|---|
Quad Cities  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-1.23 h-0.0513 days <br />-0.00732 weeks <br />-0.00168 months <br />) | |
| Opened: | Ryan Merema 23:56 Sep 8, 2009 |
| NRC Officer: | Dong Park |
| Last Updated: | Sep 9, 2009 |
| 45333 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (55 %) |
WEEKMONTHYEARENS 499772014-03-31T18:02:00031 March 2014 18:02:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Unit 2 Reactor Pressure Boundary Leakage and Unit Shutdown ENS 477992012-04-02T19:52:0002 April 2012 19:52:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Initiation of Reactor Shutdown Required by Technical Specifications (Ts) 3.8.1.F ENS 453332009-09-09T01:10:0009 September 2009 01:10:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Reactor Shutdown Required by Technical Specifications Due to an Unisolable Leak in a Core Spray Minimum Flow Line ENS 429042006-10-13T15:34:00013 October 2006 15:34:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Initiation of Reactor Shutdown Required by Technical Specification 3.1.7, Action C.1 ENS 422602006-01-15T17:04:00015 January 2006 17:04:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Ts Shutdown Due to Electromatic Relief Valves (Ervs) Declared Inoperable 2014-03-31T18:02:00 | |