05000254/FIN-2008002-05
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | On November 11, 2007, while performing the weekly stroking of the Unit 1 reactor building ventilation isolation dampers per Work Order 1077792-01 and QCOP 5750-02, Reactor Building Ventilation System, the isolation damper 1-5742-B took approximately 10 minutes to close. The acceptance criterion for the dampers closing time is less than 60 seconds. The apparent cause of the delay was binding due to improper application of thread sealing compound to the reactor building ventilation exhaust damper actuator solenoid valve resulting in the introduction of sealant into the solenoid internals as foreign material. Specifically, the licensee found that the electrician performing the work applied excessive sealing compound to the threads contrary to the procedural requirements. The inspectors determined that the failure to follow the procedural directions for application of the sealing compound during maintenance on the valve was a violation of TS 5.4.1 and was more than minor because it affected the Barrier Integrity Cornerstone attribute of Structures, Systems and Components and Barrier Performance for Containment Isolation Structures, Systems and Components reliability and if the condition were to go uncorrected the Containment isolation function could be impacted. This finding was determined to be of very low safety significance because the finding impacted only a single valve of the double valve isolation of the radiological barrier function of the reactor building ventilation system, and the valve did close after the time delay. Corrective actions included performance management for the individual involved in application of the sealant material and procedure revisions to provide additional detail |
| Site: | Quad Cities  |
|---|---|
| Report | IR 05000254/2008002 Section 4OA7 |
| Date counted | Mar 31, 2008 (2008Q1) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Barker B Cushman C Mathews D Jones J Mcghee K Stoedter M Ring R Jones W Slawinski |
| INPO aspect | |
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Finding - Quad Cities - IR 05000254/2008002 | ||||||||||||||||||||||||||||||||||||||
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Finding List (Quad Cities) @ 2008Q1
Self-Identified List (Quad Cities)
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