The Task Group and its tecimical advisors have reviewed the available information from ICNP, WISCTAR, and the Inational Acadeny of Science BIIN Committee that could be used to esti:nate the health risi: that may ’de assoctated «rith lonz tern exposures at tie level of the radiation dose and soti reagval eriteria boiaz recunminsucd. Ie is clear Irun Chis review that knowledge of the relationship vetween radiation dose and affects of thac Jose on man as characterin 4 in Jose-effect curves is i] te Risk Considerations incomplete even for external radiation exposures. For internal emitters and particularly for plutoniun, the situation is even less satisfactory. UNSCIAR has sunmarized their fundines by statins that one should not extrapolate in a linear fasnion from effects seen at hizi doses and dose rates to effects at low doses and dose rates since there is stronz likelyhood of recovery ani repair. The 3ZIR Committee, using only human data, concluded that since the low dose data were incomplete, one should conservatively assume a linear no-threshold dose-affect curve dram through data obtained at hish doses and dose rates. The Committee further Suzgpested that if this linear no-threshold curve is assumed to be correct, it follows that 6,000 cases of cancer would be produced each year in a population of 290,090,909 people exposed at a rate of 0.17 Rem/yr. (This is the FRC R?G for population groups - see Table I.) For the Enewetak population of less than 590 exposed at the same level, one can make the following estinate: 7 6 x 193 cases/vr x 329 seople = 1.5 x 1972 cases of cancer/yr 2x 198 neople SE