Document Control Desk U.S. Nuclear Regulatory Commission

this time to support future requests by the utilities of the B&WOG for elimination of requirements for a PASS system. Members of the B&WOG intend to utilize this report upon successful completion of the report evaluation by the NRC This document provides a basis for recommending the elimination of all Post Accident Sampling System (PASS) regulatory requirements at operating B&W designed plants. This report concludes that all PASS sample requirements may be eliminated. Flexible requirements may be substituted to (1) determine containment hydrogen concentration, (2) control post-accident reactivity, and (3) maintain RCS coolant at satisfactory pH levels. PASS is not needed to meet these requirements. Elimination of PASS regulatory requirements on B&W designed plants is consistent with the conclusions of th