05000254/FIN-2008005-03
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Unit 1 Turbine First Stage Pressure Switches Damaged During Dedication Testing As previously discussed in Section 4OA3.4 of this report, Quad Cities maintenance staff identified during surveillance testing that both of the switches comprising the A trip channel had as-found values that exceeded TS allowable values. The licensee identified that the safety-related turbine first stage pressure switches were damaged during testing performed at the commercial grade dedicator when the switches were tested at the manufacturers proof pressure of 2400 psig (significantly above the highest expected environmental pressure of 1000 psig that the switches would see in the design application.) This damage was not obvious and was not identified during the acceptance testing or calibration of the switches after they arrived on site. The failure of the commercial grade dedication process or site pre-installation testing to identify the damaged pressure switches following commercial grade dedication testing is a violation of 10 CFR 50, Appendix B, Criterion III, Design Control, requirements to ensure the testing program was suitable for the actual in service equipment conditions. The failure of the testing and acceptance inspections to identify the damage to these switches is more than minor because the finding impacted the Mitigating Systems Cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the cornerstone attribute of design control was impacted when the instrument setpoints were found out of tolerance as a result of damage incurred during environmental testing of the switches during commercial grade dedication. The issue was entered into the CAP as Issue Report 700455, Turbine First Stage Pressure Switches Out of Tolerance Cause Tech Spec Violation. Corrective actions included replacement of all four of the affected switches, revision of the acceptance test pressure to be used for any future procurement of the four affected turbine first stage pressure switches to a maximum of 1000 psig and training for site personnel on establishing design specifications for testing during commercial dedication. The commercial grade dedication contractor was included in the investigation and corrective action process |
| Site: | Quad Cities  |
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| Report | IR 05000254/2008005 Section 4OA7 |
| Date counted | Dec 31, 2008 (2008Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | R Winter R Orlikowski C Matthews W Slawinski C Brown B Palagi R Baker M Ring J Mcghee J Tapp B Cushman |
| INPO aspect | |
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Finding - Quad Cities - IR 05000254/2008005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Quad Cities) @ 2008Q4
Self-Identified List (Quad Cities)
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