or controlled exposures of individuals aad populations, the ICRP has recommended the term ''dose limit.'' Recommended dose limits are thought to be associated with a very low degree of risk. Where the source of exposure is subject to control, it is desirable and reasonable to set specific dose limitations. In this manner the associated risk is judged to be appropriately small in relation to the resulting benefits. The limitation must be set at a sufficiently low level so that any further reduction in risk would not justify the effort required to accomplish it. Such risks to members of the public from man-made sources of radiation should be less than or equal to other risks regularly accepted in everyday life. They should also be justi- fiable in terms of benefits that would not otherwise be received. ICRP states that since any exposure may involve some degree of risk, the Commission recommends that any unnecessary exposure be avoided, and that all doses be kept as low as is readily achievable, economic and social consideration being taken into account. REMEDIAL MEASURES Engineering and advisory actions are the two categories of remedial measures considered, 1. Engineering actions taken during cleanup and rehabilitation operations provide a basis for measurement or other determination of effectiveness and adverse impact. Good initial assurance of satisfactory completion can be given. 2. Advisory actions cover those activities of the returning people and their professional counselors in response to instructions and technical advice on land use, housing sites, dietary usages, etc. Results will be achieved over a long period and depend on the conscientious use of advice and counsel and require continuing exchange of information between inhabitants and technical sources. Because of time, human factors, pressures,and qualifications, less than optimum effectiveness may be expected, despite a strong initial will by the Eniwetok people to cooperate at the outset. BP Lh . mays SE SimsAe preg Sr ra be aE ERS apie ot , yee 4 ° Ae tage. ee Das