05000263/FIN-2009006-03
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Adequacy of the One-Time Inspection Program |
| Description | An unresolved item was identified by the inspectors involving potential inadequacies in the One-Time Inspection Program. The inspectors were concerned that indication of degradation had not been evaluated in context of the on-time inspection program. The inspectors identified WO 267268 and WO 293396, where measured wall thickness was below the evaluation threshold. The equipment was evaluated to be acceptable, based upon minimum wall thickness, but the indicated degradation was not further evaluated in the context of demonstrating the extent of aging effects. The licensee captured these concerns in AR 1175752 and AR 1175545 respectively for these two work orders. The inspectors were also concerned about the adequacy of procedures used to identify pitting corrosion. WO 346293-01 dealt with the one-time ultrasonic thickness (UT) examination of the Reactor Core Isolation Cooling system barometric condenser using UT procedure FP-PE-NDE-425 (Revision 1).This examination was to measure thickness of the material to detect the aging effect of loss of material due to corrosion, including pitting corrosion. The examination performed consisted of linear, circumferential checks, every six inches along the length of the condenser with a 0 degree transducer. The diameter of the transducer used, and therefore the approximate width of each scan, was roughly 0.30. The inspectors were also concerned that this examination was not likely to detect pitting due to the small area examined and type of transducer used. This examination adequacy issue is considered a URI pending review of the entire onetime inspection program in context during the IP 71003 team inspection. (URI05000263/2009006-03) |
| Site: | Monticello  |
|---|---|
| Report | IR 05000263/2009006 Section 4OA5 |
| Date counted | Jun 30, 2009 (2009Q2) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71003 |
| Inspectors (proximate) | S Sheldon T Bilik L Haeg A Stonea Stonel Haeg S Sheldon T Bilik |
| INPO aspect | |
| ' | |
Finding - Monticello - IR 05000263/2009006 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Monticello) @ 2009Q2
Self-Identified List (Monticello)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||