A self-revealing non-cited violation of
Technical Specification (TS) 6.8.1.a, Procedures and Programs, was identified because
PSEG did not adequately maintain the calibration of the Unit 2 reactor vessel level indication system (
RVLIS). Specifically, scaling for both
RVLIS dynamic range channels was not completed when required. This resulted in Unit 2
RVLIS being
inoperable for 13-days. The finding is more than minor because it is associated with the equipment performance attribute of the
Mitigating Systems cornerstone and because it affected the cornerstone objective of ensuring the reliability of systems that respond to
initiating events to prevent undesirable consequences. Specifically, operators were not aware that both channels of
RVLIS were
inoperable and could have taken non-conservative actions during an inadequate core cooling or loss of coolant inventory event. Per inspection manual chapter (IMC) 0609.04, Initial Screening and Characterization of Findings, the inspectors conducted a Phase 1 screen and determined the finding to be of very low safety significance (Green). This finding has a cross-cutting aspect in the area of human performance because
PSEG did not appropriately coordinate work activities as necessary to keep personnel apprised of work status and the operational impact of work activities
H.3(b). Specifically,
PSEG did not ensure
RVLIS scaling was completed per the established work control process because engineering did not adequately communicate the importance of entering the new dynamic range coefficients to the operability of the
RVLIS system. (Section 1R15
