05000237/FIN-2010002-06
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | As noted in Section 4OA3.2 of this report, in 2009, the licensee discovered that changes had been inappropriately made to the 2B reactor recirculation pump discharge valve above seat drain line. Title 10 CFR 50.59(d)(1) requires the licensee to maintain records of changes in the facility, of changes in procedures, and of tests and experiments made pursuant to 50.59(c). Contrary to this requirement, on November 6, 2003, the licensee discovered that the configuration of the above seat drain line for the discharge valve of the 2B Reactor Recirculation pump, which comprises part of the reactor pressure boundary, had been previously modified so that it did not match the piping and instrumentation drawing (P&ID). The licensee could not locate any records that described the scope or date of the change, nor could they locate an evaluation that provided the basis for the determination that the change did not require a license amendment. This change resulted in the line not meeting the requirements of ASME NB3671.3 for Class 1 piping. The configuration of the above seat drain depicted on the P&ID showed a drain line piped to the equipment drain sump with two normally closed manual isolation valves. The configuration in which the above seat drain line was found during the 2003 refueling outage was a drain line with one closed valve and a threaded cap, which did not meet the requirements of ASME NB3671.3 for Class 1 piping. Issue Report 185073 was written, and a second isolation valve and a threaded cap were added to the drain line during the 2003 refueling outage to conform to ASME requirements. The P&ID was also updated to reflect the change. The finding associated with this violation is of very low safety significance (green) because it would not have likely resulted in exceeding the Technical Specification limit for Reactor Coolant System leakage and would not have affected other mitigating systems. Therefore, this would constitute a Severity Level IV violation per the NRC Enforcement Policy, Supplement I, Section D.5 |
| Site: | Dresden  |
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| Report | IR 05000237/2010002 Section 4OA7 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | C Phillips D Melendez-Colon E Coffman J Draper M Ring R Krsek R Russell W Slawinski |
| INPO aspect | |
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Finding - Dresden - IR 05000237/2010002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Dresden) @ 2010Q1
Self-Identified List (Dresden)
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