05000382/FIN-2011004-02
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Finding | |
|---|---|
| Title | Failure to Adequately Implement a Reactor Coolant System Drain Down Procedure |
| Description | The inspectors documented a self-revealing non-cited violation of Technical Specification 6.8.1.a because the licensee did not adequately implement Operating Procedure OP-001-003, Reactor Coolant System Drain Down, during the installation of the incore instrumentation flanges. Specifically, the licensee did not establish a reactor coolant system vent path while maintaining reactor coolant level below 26 feet for the assembly of the incore instrumentation flanges as required by OP-001-003. As a result, the licensee experienced a loss of reactor coolant inventory from three unassembled incore instrumentation flanges, which spilled onto the reactor vessel head insulation and filled the upper annulus cavity of the reactor vessel. The licensee entered this issue into their corrective action program for resolution as CR-WF3-2011-3163 and CR-WF3-2011-3636. The immediate corrective actions included opening the pressurizer spray line vent valve (RC-309) to establish a reactor coolant system vent path. The finding is more than minor because it is associated with the configuration control attribute of the Initiating Events cornerstone and affects the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. The inspectors performed the initial significance determination for the failure to adequately implement operating procedures using NRC Inspection Manual 0609, Attachment 0609.04, Phase 1 Initial Screening and Characterization of Findings. The Initial screening directed the inspectors to use Attachment 1 of Appendix G, Shutdown Operations Significance Determination Process, based on the conditions of the plant at the time of the event. The inspectors evaluated the significance of the finding and determined that it did not require a quantitative assessment because adequate mitigating equipment remained available and the finding did not constitute a loss of control, as defined in Appendix G. Therefore, the inspectors determined that the finding is of very low safety significance (Green). This finding has a cross-cutting aspect in the work control component of the human performance area because the licensee did not appropriately coordinate work activities in incorporating actions to address the impact of the need to keep personnel apprised of work status, the operational impact of work activities, and plant conditions that may affect work activities |
| Site: | Waterford  |
|---|---|
| Report | IR 05000382/2011004 Section 1R20 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.2 |
| Inspectors (proximate) | M Davis S Garchow J Melfi R Azua D Overland E Uribe |
| CCA | H.5, Work Management |
| INPO aspect | WP.1 |
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Finding - Waterford - IR 05000382/2011004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Waterford) @ 2011Q3
Self-Identified List (Waterford)
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