05000336/FIN-2010004-02
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Finding | |
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Title | |
Description | The inspectors identified a Severity Level IV, NCV of 10 CFR 50.55a(2)( c)( 1) and 10 CFR 50.55a(3), when Dominion did not perform an ASME Code compliant radiographic examination for a leak in a Class 1 weld on the Unit 2 \'A\' RCP seal cooler piping before returning the system to service. Dominion was out of compliance with 10 CFR 50.55a(2)(c)(1), 10 CFR 50.55a(3), and Section III of the American Society of Mechanical Engineers (ASME) Code between July 24, 2009, and November 10,2009. The NRC granted verbal relief from the 10 CFR 50.55a(2)(c)(1), 10 CFR 50.55a(3), and the ASME Code requirements on November 10, 2009. Subsequently, the relief request was approved, in writing, by the NRC on April 26, 2010. In accordance with IMC 0612, Appendix B, Section 1-2, this finding had the potential to impact the NRC\'s ability to perform its regulatory function because Dominion verbally informed the NRC on July 17, 2009, that they would repair the affected component in accordance with ASME Code requirements. However, due to Dominion\'s misinterpretation of the ASME Code, Dominion did not subsequently inform the NRC of its inability to meet Code requirements (i.e. perform a Code compliant radiographic examination of the affected weld) before returning the plant to service. As a result, Dominion\'s actions had impeded the NRC\'s ability to evaluate and determine the efficacy of the licensee\'s actions. The issue was characterized as Severity Level IV because it is similar to the example provided in the NRC Enforcement Policy Section 6.1.d.2, in that, it involved a violation of NRC requirements that resulted in a condition evaluated as having very low safety significance (i.e., Green) by the Significance Determination Process (SDP). The inspector determined that this issue had a crosscutting aspect in the Human Performance cross-cutting area, Decision Making component, because Dominion did not use conservative assumptions in their decision making when they concluded that Code relief from the NRC would not be necessary to accomplish the repair. [H.1 (b)] |
Site: | Millstone |
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Report | IR 05000336/2010004 Section 4OA2 |
Date counted | Sep 30, 2010 (2010Q3) |
Type: | TEV: Severity level IV |
cornerstone | Initiating Events |
Identified by: | NRC identified |
Inspection Procedure: | IP 71152 |
Inspectors (proximate) | T Moslak D Jackson B Haagensen J Krafty S Shaffer M Balazik L Kauffman K Modes |
CCA | H.14, Conservative Bias |
INPO aspect | DM.2 |
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Finding - Millstone - IR 05000336/2010004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Millstone) @ 2010Q3
Self-Identified List (Millstone)
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