MAJOR CHANGES IN ENVIRONMENTAL RADIATION PROTECTICN CRITERIA ICRP No. 26 CoMMITTED VS. ANNUAL DOSE EQUIVALENT SUMMATION OF Risk - Use oF WEIGHTING FACTORS ASSUMPTIONS AS TO DISTRIBUTION OF Dose (RISK) IN ExPoseD POPULATION EPA MuLtTipLe Time Pertops - Years orf Committep Dose YEARS OF CONTINUING EXPOSURE YEARS OF ENVIRONMENTAL BuILDuUP QUANTIFICATION OF ALARA