05000255/FIN-2009004-05
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Finding | |
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Title | Inadequate Analysis of Reheater Drain Tank T-4B Drain Line Vibration |
Description | A finding of very low safety significance without an associated violation was identified by the inspectors for the licensees operation of the moisture separator reheater (MSR) system outside of its design such that significant vibration occurred in the drain tank T-4B drain line. The licensee entered this issue into its corrective action program as condition report CR-PLP-2008-4020, evaluated vibration of the drain line vibration, and performed repairs and modifications that eliminated the excessive vibratory motion in the drain line. No violation of NRC requirements occurred. The finding was determined to be more than minor because the finding was associated with the Initiating Events cornerstone attribute of equipment performance and adversely affected the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. The finding was evaluated using IMC 0609, Significance Determination Process, Attachment 0609.04, Phase 1 - Initial Screening and Characterization of Findings, Table 4a for the Initiating Events cornerstone. Based on a No answer to all the questions in the Initiating Events cornerstone column of Table 4a, the finding was determined to be of very low safety significance (Green) because the finding does not affect mitigation equipment. This finding has a cross-cutting aspect in the area of problem identification and resolution, corrective action program, because the licensee failed to ensure that issues potentially impacting nuclear safety are promptly identified, fully evaluated, and that actions are taken to address safety issues in a timely manner, commensurate with their significance. (P.1(c)) |
Site: | Palisades |
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Report | IR 05000255/2009004 Section 4OA2 |
Date counted | Sep 30, 2009 (2009Q3) |
Type: | Finding: Green |
cornerstone | Initiating Events |
Identified by: | NRC identified |
Inspection Procedure: | IP 71152 |
Inspectors (proximate) | P Laflamme T Taylor J Cassidy J Lennartz J Neurauter J Ellegood D Betancourt J Giessner |
CCA | P.2, Evaluation |
INPO aspect | PI.2 |
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Finding - Palisades - IR 05000255/2009004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palisades) @ 2009Q3
Self-Identified List (Palisades)
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