05000458/FIN-2011002-03
From kanterella
Jump to navigation
Jump to search
Finding | |
---|---|
Title | Inadequate Control Rod Inspection Procedure |
Description | The inspectors identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, involving an inadequate control rod inspection procedure. Specifically, the stations procedures only required inspection of a only 20 percent of the control rods that exceeded the inspection criteria, instead of all of them. The station currently has 18 CR 82M control rods in the reactor core in shutdown locations that have exceeded Westinghouses inspection threshold exposure limits. In response to the inspectors inquries, the licensee reviewed their water chemistry and concluded the current tritium and boron levels indicated there was margin for control rod operability. The licensee intends to monitor the reactor coolant for increasing boron and tritium levels throughout this operating cycle. The licensee placed this issue into their corrective action program as Condition Report CR-RBS-2011-01704. The finding is more than minor because it is associated with the equipment performance attribute of the reactor safety Mitigating Systems Cornerstone, and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Using Inspection Manual Chapter 0609, Significance Determination Process, Phase 1 Worksheet, the finding is determined to be of very low safety significance (Green) because it did not result in a loss of system safety function. The inspectors determined that the apparent cause of the performance deficiency was River Bend Stations failure to communicate relevant operating experience to affected internal and external stakeholders. This finding has a crosscutting aspect in the area of problem identification and resolution associated with the operating experience component because the licensee failed to appropriately apply all the CR 82M control rod inspection requirements provided by the control rod vendor P.2(b) (Section 1R20). |
Site: | River Bend |
---|---|
Report | IR 05000458/2011002 Section 1R20 |
Date counted | Mar 31, 2011 (2011Q1) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.2 |
Inspectors (proximate) | T Farina L Ricketson P Elkmann B Tharakan R Kopriva D Stearns A Barrett G Larkin V Gaddy D Strickland |
CCA | P.5, Operating Experience |
INPO aspect | CL.1 |
' | |
Finding - River Bend - IR 05000458/2011002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (River Bend) @ 2011Q1
Self-Identified List (River Bend)
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||