Green. The team identified a finding of very low safety significance involving a non-cited violation of
10 CFR 50, Appendix B, Criterion III, Design Control, in that, Entergy did not properly translate design basis parameters into specifications and procedures for the salt
service water (
SSW) system. Specifically, the system hydraulic analysis did not establish a system leakage limit, and the plant operating procedures allowed alignments that could have led to a condition where system leakage could have been in excess of the available margin. Entergy entered this issue into their corrective action system and instituted immediate corrective actions. This finding is more than minor because the deficiency represented reasonable doubt on the operability of the
SSW system. The finding is associated with the design control attribute of the
Mitigating Systems Cornerstone and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to
initiating events to prevent undesirable consequences. The team determined the finding was of very low safety significance (Green) because it was a design deficiency confirmed not to result in a loss of the
SSW system. (1R21.2.1.11