05000275/FIN-2018008-06
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Finding | |
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Title | Minor Violation |
Description | Performance Deficiency: Failure to install safety-related pressure transmitters (PTs) in accordance with engineering design documents, without documented authorization and prior approval for deviation from that design. Unit 2 Steam Generator pressure transmitters PT-544A and PT-534A were not installed per design. The design called for mounting the PTs on independent unistruts but, contrary to this, the transmitters were installed on a common unistrut. Though the new mounting configurations were documented and analyzed in SAPNs 50881613 and 50881415, Work Order 68039185 which installed the PTs did not record the deviation from originally designed mounting configuration. The licensee attributed the failure to install per original design to human error and initiated SAPN 50976632 to evaluate it. Screening: The performance deficiency is minor in that the current configuration was evaluated not to affect the seismic or structural qualification. Enforcement: This failure to comply with 10 CFR Part 50, Domestic licensing of production and utilization facilities, Appendix B, Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants, Criterion III, Design Control, constitutes a minor violation that is not subject to enforcement action in accordance with the NRCs Enforcement Policy. |
Site: | Diablo Canyon |
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Report | IR 05000275/2018008 Section 4OA2 |
Date counted | Jun 30, 2018 (2018Q2) |
Type: | Violation: Severity level Minor |
cornerstone | No Cornerstone |
Identified by: | NRC identified |
Inspection Procedure: | IP 71152 |
Inspectors (proximate) | E Ruesch J Braisted N Okonkwo J Reynoso G George |
INPO aspect | |
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Finding - Diablo Canyon - IR 05000275/2018008 | |||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Diablo Canyon) @ 2018Q2
Self-Identified List (Diablo Canyon)
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