ENS 49300
ENS Event | |
|---|---|
20:26 Aug 22, 2013 | |
| Title | Unit 1 Commenced a Ts Required Shutdown Due to Unidentified Rcs Leakage > 1 Gpm |
| Event Description | Salem Unit 1 has initiated a unit shutdown in accordance with TS (Technical Specification) Action Statement 3.4.6.2(b) for unidentified leakage greater than 1 gpm [gallon per minute] (Entered on 8/22/13 at 1029 EDT). TS 3.4.6.2 Action Statement (b) requires a reduction of leakage rate to within limits within 4 hrs. or be in at least Hot Standby within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Initial investigation has indicated that the leakage source is from packing on Pressurizer Spray Valve 1PS1 located in the RCS [Reactor Coolant System] Pressurizer shroud area inside Containment. Unidentified leakage is currently indicating 4 gpm. NRC Resident [Inspector] has been notified. Manual isolation is in progress.
Additionally, TS Action Statement 3.6.1.4 Primary Containment Internal Pressure was entered at 1510 [EDT] for exceeding 0.3 psig. Action requires restoration of containment pressure to within specification in 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or be in hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Containment pressure was restored to less than 0.3 psig at 1647 [EDT] and TS 3.6.1.4 was exited. Peak containment pressure reached [was] 0.33 psig. Location of leak: Unit 1 RCS (containment), Pressurizer, 1PS1 Pressurizer Spray Valve Packing Time & date leak started: 1019 [EDT] on 08/22/2013 Leak rate: 4 gpm, T/S leak limits: 1 gpm Last known coolant activity: Primary (DEI [Dose Equivalent Iodine]-microCuries/cc) 5.973E-5 microCuries/cc Secondary (gbg [Gross Beta Gamma]-microcuries/cc) < LLD [Lower Limit of Detectability] Was this leak a sudden or long-term development? Sudden The licensee is reducing power at 30%/hour and anticipates entering Mode 3 in approximately 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />. The 1PS1 Pressurizer Spray Valve was replaced and the air operator rebuilt during the last refueling outage in April/May of 2013. The licensee informed the State of New Jersey and will 9inform the Lower Alloways Creek [LAC] Township. |
| Where | |
|---|---|
Salem  New Jersey (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-3.3 h-0.138 days <br />-0.0196 weeks <br />-0.00452 months <br />) | |
| Opened: | Matt Mog 17:08 Aug 22, 2013 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Aug 22, 2013 |
| 49300 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (81 %) |
WEEKMONTHYEARENS 525812017-02-28T15:00:00028 February 2017 15:00:00
[Table view]10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Technical Specification Shutdown Due to Reactor Coolant System Pressure Boundary Leakage ENS 521292016-07-28T09:41:00028 July 2016 09:41:00 10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Source Range Instruments Reading Improperly During a Reactor Startup ENS 508962015-03-15T16:27:00015 March 2015 16:27:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Plant Shutdown Due to Failure to Restore Containment Fan Cooler Unit ENS 493002013-08-22T20:26:00022 August 2013 20:26:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Unit 1 Commenced a Ts Required Shutdown Due to Unidentified Rcs Leakage > 1 Gpm ENS 478742012-04-30T14:18:00030 April 2012 14:18:00 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)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(2)(iv)(A), System Actuation - ECCS Discharge Unusual Event Due to a Potential Fire in Containment ENS 470522011-07-15T00:53:00015 July 2011 00:53:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Unusual Event Declared Based on Reactor Coolant Leak Greater than 10 Gpm ENS 442052008-05-12T19:00:00012 May 2008 19:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Shut Down Initiated Due to Inoperable Steam Generator Flow Channels ENS 416702005-05-06T03:05:0006 May 2005 03:05:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specifications Required Plant Shutdown Began and Then Terminated ENS 416162005-04-20T01:52:00020 April 2005 01:52:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specificiation Required Shutdown Related to Pressure Boundary Leakage ENS 408232004-06-17T04:22:00017 June 2004 04:22:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Tech Spec Required Plant Shutdown Due to Emergency Core Cooling System Inoperable ENS 407872004-06-02T16:30:0002 June 2004 16:30:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Plant Shutdown Was Initiated to Comply with Tech Spec. 3.6.1.1. Primary Containment Integrity. ENS 407642004-05-21T17:15:00021 May 2004 17:15:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Technical Specification Shutdown ENS 402502003-10-15T20:03:00015 October 2003 20:03:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Feedwater Regulating Valve Issue Forces Initiation of Technical Specification Shutdown 2017-02-28T15:00:00 | |