10 CFR 50, Appendix B, Criterion III, Design Control, requires, in part, that the design basis is correctly translated into specifications. Contrary to the above, the design basis was not correctly translated into specifications in that the specified current rating for electrical switches supplying electric heaters in the
standby gas treatment system were less than the designed circuit amperage from original plant construction, February 28, 1973, until November 13, 2013. Entergy identified that the standby gas treatment auxiliary switches supplying the charcoal bed heaters in both A and B subsystems were rated for a continuous current of 3 A when the continuous current was approximately 8 A. Entergy entered this issue into the corrective action program as
CR-VTY-2013-06257. The inspectors determined that the finding was of very low safety significance (Green) in accordance with
IMC 0609, Appendix A, The
Significance Determination Process (
SDP) for Findings At-Power, because the finding only represented a degradation of the radiological barrier function provided for the
standby gas treatment system.
