ENS 48023
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ENS Event | |
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22:45 Jun 13, 2012 | |
Title | High Pressure Coolant Injection System Declared Inoperable |
Event Description | On 6/13/12 at 1700 CDT, it was determined that valve 2-FCV-73-81 (HPCI steam line warm-up valve) was not capable of performing its intended primary containment isolation valve function. This determination was made during performance of a prompt determination of operability for a steam leak from a missing adapter on a Furmanite injection port in the valve packing area. To meet Technical Specification (TS) 3.6.1.3 action requirements for an inoperable primary containment isolation valve, 2-FCV-73-2 (HPCI inboard steam isolation valve) was closed at 1745 hrs., rendering U2 HPCI inoperable. As a result TS 3.5.1 actions were entered.
This incident is reportable as an 8-hour ENS notification under 10CFR 50.72 (b)(3)(v)(B) and (D) as 'any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to remove residual heat and mitigate the consequences of an accident.' It also requires a 60 day written report in accordance with 10CFR 50.73(a)(2)(v)(B) and (D). The NRC Resident Inspector has been notified. This event has been entered into the Licensee's Corrective Action Program as SR 565729. Technical Specification 3.6.1.3 had a 4-hour shutdown action statement which was satisfied when the HPCI inboard steam isolation valve was closed. Technical Specification 3.5.1 action statement is a 14-day shutdown LCO. |
Where | |
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Browns Ferry Alabama (NRC Region 2) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
Time - Person (Reporting Time:+1.55 h0.0646 days <br />0.00923 weeks <br />0.00212 months <br />) | |
Opened: | Thomas Bradford 00:18 Jun 14, 2012 |
NRC Officer: | Howie Crouch |
Last Updated: | Jun 14, 2012 |
48023 - NRC Website
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Unit 2 | |
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Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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