05000443/FIN-2008003-02
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Finding | |
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Title | Inadequate corrective actions to prevent recurrence of mispositioned stow-operated valves caused inadvertent drain of 2000 gallons from RCS |
Description | A self-revealing non-cited violation of 10 CFR 50, Appendix B, Criterion XVI, Corrective Actions, was identified because FPLE did not implement corrective actions to prevent recurrence of mispositioned valves caused by difficult to operate stow-operator reach rods. Specifically, on April 20, 2008, a mispositioned (partially open), stow-operated filter drain valve, CS-V-1190, resulted in the inadvertent draining of 2000 gallons of water from the reactor cavity while operators placed the reactor letdown system into service. The drain valve was partially open because it was difficult to operate when positioned with its stow-operator. The mispositioning of a stow-operated valve in a safety system was a repeat occurrence of a similar event in October 2007. This finding was more than minor because it was associated with the configuration control attribute of the Initiating Events cornerstone and adversely affected the cornerstone objective to limit the likelihood of plant events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Specifically, the loss of configuration control in the charging system unintentionally drained 2000 gallons from the reactor cavity, which affected the shutdown critical safety function of maintaining adequate reactor inventory. The finding was determined to be of very low safety significance (Green) using the SDP Phase 1 assessment, since the finding did not result in a loss of control of shutdown operations and adequate mitigation capabilities remained available. FPLE entered this issue into the corrective action program as Condition Report 08-06260. The finding has a cross-cutting aspect in the area of problem identification and resolution because FPL Energy did not take appropriate corrective actions to address safety issues in a timely manner commensurate with their safety significance and complexity (P.1.d). Specifically FPL Energy did not take adequate corrective actions to assure the correct positioning of stow-operated safety system valves and thereby prevent recurrence of a significant condition adverse to quality. (Section 1R20 |
Site: | Seabrook ![]() |
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Report | IR 05000443/2008003 Section 1R20 |
Date counted | Jun 30, 2008 (2008Q2) |
Type: | NCV: Green |
cornerstone | Initiating Events |
Identified by: | Self-revealing |
Inspection Procedure: | IP 71111.2 |
Inspectors (proximate) | T Moslak D Silk L Scholl R Moore G Johnson T Burns A Ziedonis W Raymond A Burritt J Johnson |
CCA | P.3, Resolution |
INPO aspect | PI.3 |
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Finding - Seabrook - IR 05000443/2008003 | |||||||||||||||||||||||||||
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Finding List (Seabrook) @ 2008Q2
Self-Identified List (Seabrook)
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