CRITERIA ID PersonnelRemainingIndoors DISCUSSION The action of requesting personnel to remain Indoors is tredicated aD on the principle that th for evacu.tion taht 7 rodiaticn levels sre below those estsblishs| and that this action could reduce the amount of coniun- ination of personnel and reduce somewhat the whole-body gama cose. (See Appendix A for estimates of reduction in whole-body gamma dose. ) The actual "savirgs” heslthwise heve to be balanced against possible we adverss public reaction. The principal gein in reaguesting personnel to remain Indoors is to prevent or raduce the anoint of atocic dcbris thit may actusally fall on the bady cr clothing. Since the peek of fallout usually occurs shortly after the start of faliout, it is important that prompt decisions er actions ts taken, This, by netecsitr, the most practical criteria upon whach to base a decisicu are g.mma das: rate readings, which ove in turn related t+ tne anoint of fallout. The most immediate solution misht be to establish lower permitted ce dose rate isveis at le er tincs after detonation. However, if~ a series of dose rates are established for inecre>sing times after detonation s5 that their relationship follows tr7de2, then the doses delivered in x hours (before the material is washed off) will be greater for earlier times after detonaticn. If one were sure of the fims that the fallout material was to remain in place, then a scale of dose rates versus tice after detonation could be made to yield the same total dose over the X hours. Since there is obviously no set time period for duration of con- ~15-