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A self-revealing Green NCV of Hatch Unit 1 … A self-revealing Green NCV of Hatch Unit 1 and Unit 2 Technical Specification 5.4. Procedures, was identified on June 21, 2012, when the C main control room air conditioning unit tripped due to loss of power when the licensee operated an electrical breaker outside of procedural guidance. The licensee entered this issue into their corrective action program as CR 473701. Failure to restore the A main control room air conditioner tagout clearance in accordance with the tag removal list on June 21, 2012, was a performance deficiency. Specifically, tagout 1-DT-1Z41-00168(004) required the normal supply breaker for 1R24S029 to be maintained open but the breaker was improperly positioned closed instead. This performance deficiency was more-than-minor because it adversely affected the Human Performance attribute of the Barrier Integrity Cornerstone objective to provide reasonable assurance that physical design barriers protect the public from radionuclides caused by accidents or events. The inspectors evaluated the finding in accordance with IMC 0609, Attachment 4, Initial Characterization of Findings, using Table 2 Cornerstones Affected by Degradation Condition or Programmatic Weakness. The inspectors determined that the finding affected the barriers cornerstone. Further evaluation was required using IMC 0609 Appendix A, The Significance Determination Process (SDP) for Findings At-Power. Based on Appendix A, Exhibit 3, Barrier Integrity Screening Questions, the finding represented a degradation of the radiological barrier function provided for the control room and therefore screened as Green. The inspectors determined this finding has a cross-cutting aspect in the Work Practices component of the Human Performance Area because the licensee did not communicate the human error prevention technique of holding an adequate pre-job brief for the restoration of the electrical portion of the tagout.n of the electrical portion of the tagout. +
23:59:59, 30 September 2012 +
23:59:59, 30 September 2012 +
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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Frank Ehrhardt +, A Toth +, A Nielson +, A Vargas +, E Morris +, David Hardage +, Bruno Caballero +, Mark Miller +, Carmen Dykes + and William Pursley +
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>.
19:05:25, 30 September 2017 +
Frank Ehrhardt +, A Toth +, A Nielson +, A Vargas +, E Morris +, David Hardage +, Bruno Caballero +, Mark Miller +, Carmen Dykes + and William Pursley +
23:59:59, 30 September 2012 +
Failure to follow clearance procedures for returning the A main control room air conditioning unit to service following maintenance +