A self-revealing, Green, non-cited violation (
NCV) of
Technical Specification 6.4, Procedures, was identified in which technicians incorrectly performed
reactor core isolation cooling (
RCIC) surveillance test operating procedure (OP) 4365,
RCIC Steam Line Low Pressure Functional/Calibration, Rev. 25, resulting in the inadvertent isolation of the
RCIC system. Entergy entered this issue into their corrective action program, correctly installed the test equipment, and subsequently performed the test satisfactorily. The inspectors determined that the finding was more than minor because it adversely affected the Human Performance attribute for the
Mitigating Systems cornerstone objective to ensure the availability, reliability, and capability of systems that respond to
initiating events to prevent undesirable consequences. In accordance with
IMC 0609, Attachment 0609.04, Phase 1 - Initial Screening and Characterization of Findings, the finding was determined to be of very low risk significance (Green) because the finding was not a design or qualification deficiency, did not represent a loss of system safety function or loss of a single train for greater than its allowed technical specification time, and did not screen as potentially risk significant due to seismic, flooding, or severe weather
initiating events. The inspectors determined this finding had a cross-cutting aspect in the Human Performance cross-cutting area, Work Practices component, in that Entergy failed to appropriately self-check and peer-check the digital multimeter (DMM) setup prior to connecting it to the
RCIC isolation logic.
H.4(a)