ENS 48822
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ENS Event | |
|---|---|
13:00 Mar 14, 2013 | |
| Title | Unit 2 Shutdown Required by Technical Specifications Due to Inoperable Rcic |
| Event Description | At 0300 [CDT] on 3/02/2013, radiography results for the U2 [Unit 2] RCIC [Reactor Core Isolation Cooling] system stop-check valve 2-HCV-71-14 showed this valve to be in the fully open position thus, not meeting the acceptance criteria of 2-SI-3.2.3 (Testing ASME Section XI Check Valves). This valve is the RCIC turbine exhaust stop-check valve. It is one of two PCIVs [Primary Containment Isolation Valves] connecting RCIC directly to primary containment. TS [Technical Specification] 3.6.1.3 (PCIVs) Condition 'A' was entered. In order to comply with TS 3.6.1.3 Condition 'A', the RCIC system was required to be isolated to prevent flow through the RCIC turbine exhaust check valve 2-CKV-71-0580. This valve is the upstream RCIC turbine exhaust line PCIV. 2-FCV-71-003, RCIC Steam Line Outboard Isolation valve, was closed and deactivated to meet TS 3.6.1.3 (PCIV) Condition 'A' at 0525 [CDT] on 03/02/2013. This resulted in RCIC being unable to auto initiate and required U2 to enter TS 3.5.3 (RCIC System) Condition 'A', which requires RCIC to be returned to service within 14 days. Because valve 2-HCV-71-14 is unisolable to primary containment, a unit S/D [Shutdown] is required to perform repairs. The RCIC TS LCO [Limiting Condition for Operation] 3.5.3 requires that U2 be in MODE 3 by 1725 [CDT] on 03/16/2013 and <150psig by 1725 [CDT] on 03/17/2013.
Action to initiate Reactor S/D was taken on 03/14/2013 at 0800 [CDT]. The licensee informed the NRC Resident Inspector. |
| Where | |
|---|---|
Browns Ferry  Alabama (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown | |
| Time - Person (Reporting Time:+-3.17 h-0.132 days <br />-0.0189 weeks <br />-0.00434 months <br />) | |
| Opened: | Bill Ball 09:50 Mar 14, 2013 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Mar 14, 2013 |
| 48822 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (85 %) |
| After | Power Operation (80 %) |
WEEKMONTHYEARENS 536782018-10-21T05:00:00021 October 2018 05:00:00
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