05000321/FIN-2009003-03
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | A licensee-identified violation of 10CFR50 Appendix B, Criterion V, Instructions, Procedures and Drawings which states in part that activities affecting quality shall be prescribed by documented instructions of a type appropriate to the circumstances. Contrary to this on May 4, 2009, it was determined that the B inboard MSIV failed to meet the TS minimum time to close greater than or equal to 3 seconds. The valve closed in 1.53 seconds. The valve design contains a hydraulic cylinder which acts to control the valve closing time. This condition was documented in CR 2009104488.A cause determination was performed which determined procedure 52SV-B21-001-1failed to provide adequate instructions on use of the proper sealant for threaded fittings on the hydraulic cylinder. According to the licensees cause determination, the Teflon tape found on the fitting was found to have degraded to the point to allow the hydraulic fluid to leak out of the cylinder. The Teflon tape failed due to its interaction with the hydraulic oil in the actuator and should not have been used on these threaded fittings. This violation was determined to have very low safety significance because an evaluation of the plants response to pressurization events was performed for this condition which determined the peak dome and vessel pressures would have remained below their limits of 1325 psig and 1375 psig, respectively. LER 05000321/2009-002 MSIV Closed Outside of the Allowable Time Due to Loss of Oil in Actuator is closed |
| Site: | Hatch  |
|---|---|
| Report | IR 05000321/2009003 Section 4OA7 |
| Date counted | Jun 30, 2009 (2009Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | R Bernhard S Shaeffer J Hickey P Niebaum |
| INPO aspect | |
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Finding - Hatch - IR 05000321/2009003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Hatch) @ 2009Q2
Self-Identified List (Hatch)
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