A self-revealing non-cited violation (
NCV) of
Technical Specifications (TS) 5.4.1.a, Procedures, was identified for the licensees failure to properly implement procedure 24750- 2,
Steam Generator Level (Narrow Range) Protection Channel II
2L-519 Channel Operational Test and Channel Calibration. During testing of Unit 2 loop 1
steam generator (S/G) narrow range channel
2L-519 the channel was not removed from scan resulting in a
reactor trip. The licensees immediate corrective actions were to remove the technicians performing the calibration from maintenance duties for formal remediation. The licensee documented this condition in CR 10230073. The performance deficiency (
PD) was more than minor because it adversely affected the
Initiating Events cornerstone objective in that the failure to properly remove channel
2L-519 from scan resulted in a
reactor trip. The finding was determined to be Green because the
PD did not result in a loss of mitigation equipment used to transition the reactor to a stable shutdown condition. The finding was assigned a cross cutting aspect of Avoid Complacency because maintenance technicians failed to implement appropriate error reduction tools to verify that the correct channel was removed from scan for testing.
