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The inspectors identified a non-cited viol … The inspectors identified a non-cited violation of 10 CFR Part 50, Appendix B, Criterion V, for failure to select an appropriately contoured ultrasonic examination search unit wedge in accordance with procedure NDE-173, PDI Generic Procedure for the Ultrasonic Examination of Austenitic Piping Welds. Consequently, three elbow-to-pipe socket welds on the chemical and volume control system (CVCS) line were examined with the incorrectly contoured search unit and this examination would not provide a demonstrated level of accuracy necessary to reliably detect and size thermal fatigue cracks. The licensee entered this condition into the CAP as AR 01860155. To restore compliance with NRC regulations, the licensee considered the option of repeating these weld examinations using a qualified ultrasonic examination technique or the option to seek NRC approval to deviate from the American Society of Mechanical Engineers (ASME) Code Section XI requirements for ultrasonic examination. The inspectors determined the finding to be more than minor in accordance with IMC 0612, Appendix B, Issue Screening, issued September 7, 2012, because the inspectors answered Yes to the more-than-minor screening question, If left uncorrected, would the performance deficiency have the potential to lead to a more significant safety concern? Specifically , the examination of three chemical and volume control system welds was presumed adequate and absent NRC intervention, would have been returned to service for an indefinite period of service, which would have placed the piping at increased risk for undetected thermal fatigue cracking, leakage, or component failure. In accordance with Table 2, Cornerstones Affected by Degraded Condition or Programmatic Weakness, of IMC 0609, Attachment 4, Initial Characterization of Findings, issued June 19, 2012, the inspectors checked the box under the Initiating Events Cornerstone because leakage at this chemical and volume control system letdown line could result in a primary system loss of coolant accident. The inspectors determined this finding was of very low safety significance based on answering No to the questions in Part A of Exhibit 1, Initiating Events Screening Questions, in IMC 0609, Attachment A, The Significance Determination Process (SDP) for Findings At-Power, issued on June 19, 2012. The inspectors answered these questions No because of the small diameter (2-inch) of the line and because the affected pipe welds were subjected to a VT-2 visual and penetrant testing (PT) examination that did not identify rejectable defects. The primary cause of the failure to select ultrasonic equipment (search unit contour) in accordance with procedure NDE-173 was related to the cross-cutting component of human performance, work practices, because the licensees management staff did not adequately set up clear expectations for procedure control and adherence for this activity. Specifically, insufficient direction was provided to vendor staff for simultaneous use of two procedures, NDE-178 and NDE-173, with different equipment requirements and restrictions (H.4(b)).nt requirements and restrictions (H.4(b)).
23:59:59, 30 June 2013 +
23:59:59, 30 June 2013 +
Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
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Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
00:48:50, 21 February 2018 +
23:59:59, 30 June 2013 +