Empirically determined decision levels development and use in an in vivo bioassay program

This paper discusses a method to empirically determine and a use for reporting a decision level value for {sup 137}Cs using a Canberra Accuscan II, direct radiobioassay (in vivo) system. The decision level value is used to determine the upper 5% of in vivo measurements for the purpose of recounting individuals. The paper overviews decision level concepts, the applicability of ANSI N13.30 and ANSI N42.2 and describes the specific process employed.