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{{#Regex_clear:The following report was re … {{#Regex_clear:The following report was received via email:</br>Based on test data, Rotork believes an unsafe condition may exist as defined under 10 CFR 21. The adhesive formulation used for the construction of V12 and K5 safety related micro switches was altered by the switch maker's sub-supplier. K5 switches have no reported failures, but are affected because of construction. The altered adhesive formulation outgases an insulating material at elevated temperatures, which coats the switch contacts as it cools and can prevent the conduction of electricity.</br>* * * UPDATE AT 0938 EDT ON 10/31/16 FROM PATRICK A. SHAW TO S. SANDIN VIA FAX * * *</br>This letter provides an update to the Rotork Controls Inc. Part 21 filing submitted May 4th 2016; documented in U.S.NRC Event Number 51907.</br>Rotork have developed versions of the V12 & K5 switches that eliminate adhesive from the materials of construction.</br>Evaluation of pre-production V12 switches, by thermal aging for 10 days at 125�C (257F), demonstrate the switch non-metallic housing and plunger also outgas materials that contributed to the accumulated contamination observed on switch electrical contacts as reported in Event 51907. The cause of the new outgassing sources and extent of condition is currently being investigated. For the moment suitable replacement switches remain unavailable that correct the issue reported in Event 51907.</br>At this point in time, Rotork do not have grounds to believe the extent of condition is altered from that reported in Event Number 51907.</br>Notified R1DO (Schroeder), R2DO (Guthrie), R3DO (Daley), R4DO (Vasquez) and PART 21/50.55 REACTORS via email. }}quez) and PART 21/50.55 REACTORS via email. }} +
04:00:00, 25 January 2016 +
51,907 +
14:56:00, 4 May 2016 +
04:00:00, 25 January 2016 +
{{#Regex_clear:The following report was re … {{#Regex_clear:The following report was received via email:</br>Based on test data, Rotork believes an unsafe condition may exist as defined under 10 CFR 21. The adhesive formulation used for the construction of V12 and K5 safety related micro switches was altered by the switch maker's sub-supplier. K5 switches have no reported failures, but are affected because of construction. The altered adhesive formulation outgases an insulating material at elevated temperatures, which coats the switch contacts as it cools and can prevent the conduction of electricity.</br>* * * UPDATE AT 0938 EDT ON 10/31/16 FROM PATRICK A. SHAW TO S. SANDIN VIA FAX * * *</br>This letter provides an update to the Rotork Controls Inc. Part 21 filing submitted May 4th 2016; documented in U.S.NRC Event Number 51907.</br>Rotork have developed versions of the V12 & K5 switches that eliminate adhesive from the materials of construction.</br>Evaluation of pre-production V12 switches, by thermal aging for 10 days at 125�C (257F), demonstrate the switch non-metallic housing and plunger also outgas materials that contributed to the accumulated contamination observed on switch electrical contacts as reported in Event 51907. The cause of the new outgassing sources and extent of condition is currently being investigated. For the moment suitable replacement switches remain unavailable that correct the issue reported in Event 51907.</br>At this point in time, Rotork do not have grounds to believe the extent of condition is altered from that reported in Event Number 51907.</br>Notified R1DO (Schroeder), R2DO (Guthrie), R3DO (Daley), R4DO (Vasquez) and PART 21/50.55 REACTORS via email. }}quez) and PART 21/50.55 REACTORS via email. }} +
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00:00:00, 31 October 2016 +
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>.
01:43:56, 2 March 2018 +
14:56:00, 4 May 2016 +
100.497 d (2,411.93 hours, 14.357 weeks, 3.304 months) +
04:00:00, 25 January 2016 +
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