The following is a excerpt from a report received via email:
"On October 18, 2017 a deviation in the original qualification testing of SOR safety-related switches was discovered by a NRC vendor inspection conducted from October 16-20, 2017. SOR continues to evaluate those items cited by NON 99900824/2017-201-01 Items 1 through 3 and other effects on safety related components identified by SOR.
The qualification test report was written in 1992. Due to the age of the report, SOR continues to retrieve records and consult contracted sources. The evaluation is expected to be completed as soon as possible or by February 27, 2018.
If you have any questions regarding this matter, please contact:
Mike Bequette,
Vice President of Engineering
Email: mbequette@sorinc.com
Tel 913-956-3040
- * * UPDATE ON 2/5/2018 AT 1719 EST FROM MELANIE DIRKS TO DAVID AIRD * * *
The following is an excerpt from a report received via email:
SOR has identified the following reportable deviations:
The Test Report did not account for all [Measuring and Test Equipment] uncertainties. The following are affected:
-Qualified Life
-LOCA [Loss of Coolant Accident] profile
-HELB1 [High Energy Line Break] profile
-HELB2 profile
During qualification testing, observed repeatability in excess of 1 percent of span was not adequately addressed for some models. The following will be affected:
-Vacuum switches (post LOCA only)
-Temperature switches
The Test Report presents data that is intended to provide a means to calculate reductions in qualified life depending on the conditions of the end use. However, there is a risk that this information could be overlooked by the end user. Following are the potential contributing factors to qualified life:
-Temperature rise due to electrical load on switch element
-Temperature rise on direct mount temperature switches due to elevated process temperature
SOR has conducted or is conducting the following corrective actions:
-Provided details in this report regarding the NQ models strings and non-standard models potentially affected
-Identified the contact list of customers potentially affected by this deviation within this notification
-Notifying the utilities as indicated with a copy of this notification attached targeting completion by February 8, 2018
-Revise and update test report 9058-102 to revision 3 targeting completion and availability by February 28, 2018
Notified R1DO (Powell), R2DO (Heisserer), R3DO (Duncan), R4DO (Deese), and Part 21 Group (via email).