UNCLASS IFIED (1) Population vs. oc¢upational dose (2) Young vs. adult (33 Whole body vs. localized dose ec, Relationships between internal and external radiation dose oe ‘ 2, Calculation of cumulative dose rates and dosages from external radiation and internal radiation of various kinds and under various conditions of exposure N, Philosophy: the assumptions and models behind the establishment of the standards aa 1. Historical trends to the present and trends for the future 2. The validity of the assumptions now used in the light of up-to-date knowledge 3.° Possibility of hazards resulting from low-level exposure: threshold considerations a. Why do we not know whether or not there is a-threshold for each of the various radiation effects of interest? How and when can we improve knowledge on this point? b. A radiologist may believe that the existence of a threshold is probable or he may not...what are the pros and cons? ec, What about the acceptability of the currently recommended standards under either belief of (b)? a 4, The probable trend of the standards for the future a. Will new standards have to be developed to cover certain hazards not now adequately protected against? b,. Are the standards defined in such a way that they can be ranked for any given situation so that the proper standard among several can be chosen to give the least likelihood of hazardous exposure? Is there any ambiguity if several standards apply? c. Do there now exist, or are ther likely to be, different standards in use by the U. S. and other governments, or by the U. 5S. and states and municipalities? -~ BO -

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