05000382/FIN-2009009-05
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Finding | |
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| Title | |
| Description | The team identified an issue where the licensee may have installed the emergency feedwater turbine-driven pump\\\'s discharge check valve contrary to the manufacturer\\\'s requirements, did not take compensatory measures, did not notify the manufacturer of the deviation from the installation instructions, and did not justify the deviation in the plant\\\'s design basis. Description. The team selected emergency feedwater turbine-driven pump discharge check valve \\\'207 AB\\\' as one of the components being reviewed during the inspecton. The team requested several design documents pertaining to this valve including the manufacture\\\'s (vendors) installation and maintenance instructions. The vendor\\\'s document provided to the team identified some very specific requirements for the installation of the valve, which the licensee had not adhered to for the installation of the valve. The valve\\\'s manufacturer specified that if the media velocity exceeds 8 ft/second, the installation must maintain a minimum of 5 pipe diameters between the valve\\\'s flange and the upstream pipe fittings (valves, pumps, elbows, reducers, etc.). The manufacturer also stated Avoid severe increases in velocity ahead of the valve by using gradual (7 degree or less taper) reducers. Furthermore, the manufacturer warned Any deviation from this recommendation could damage the valve due to turbulence which will cause plate flutter and accelerated part wear. Moreover, the manufacturer required that if any of these conditions exist, the cycle of periodic inspection must be increased. Finally, the manufacturer warned that the use of special stabilizers may be required. Contrary to the manufacturer\\\'s installation instructions, 1) the valve\\\'s media velocity is 9.83 feet per second (according to calculation MN(Q)-1 0-1, Revision 2, Section 7.1.5), but the valve was installed only 2.4 (rather than 5) pipe diameters from the upstream elbow; 2) the valve is subjected to severe increase in velocity whenever the turbine-driven pump starts, but gradual reducers were not installed; 3) the cycle of periodic inspection was not increased, rather, the valve was not inspected for 17 years and was not scheduled for any future inspections (the valve was not in the licensee\\\'s preventive maintenance program); and 4) the manufacturer was not asked whether special stabilizers would be required. The licensee was informed of the team\\\'s discovery of the condition. The team informed the licensee that the finding appeared to be a violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, where measures shall be established to assure that applicable regulatory requirements and the design basis, are correctly translated into specifications, drawings, procedures, and instructions. At the end of the inspection, the licensee informed the team that they had provided The incorrect vendor manual to the team for the emergency feedwater turbine- |
| Site: | Waterford  |
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| Report | IR 05000382/2009009 Section 1R21 |
| Date counted | Sep 30, 2009 (2009Q3) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | C Smith T Farnholtz W Sifre J Leivo E Uribe N Hernandezk Claytonr Kopriva J Adams M Runyan J Chiloyan M Yeminy R Kellar B Correll |
| INPO aspect | |
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Finding - Waterford - IR 05000382/2009009 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Waterford) @ 2009Q3
Self-Identified List (Waterford)
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