Order number 940330-160606-96 -~001-001 page 30 set 11 with 111 of 111 items treating uncertainty are to apply statistical methods of estimation, which are, in turn, based upon fhe concept of probability. Even in cases where the source of uncertainty is of non-statistical nature, formal application of statistical methods of analysis is often made to deal quantitatively with uncertainty, tacitly accepting the premise that uncertainty - whatever its nature - can be equated with randomness. Most of the work on risk analysis or risk assessment has been done using such methods. In the fuzzy set concept set uncertainties are accepted as uncertain with the introduction of the membership function. Instead of the non-fuzzy two-valued logic ‘true or false’ any intermediate value between zero (false) and one (true) can be assumed for the membership function in the fuzzy set theory. Use of the fuzzy set theory is proposed in an attempt to analyse the causal relation between dose and effects under emergency conditions. After the atomic bombings in Hiroshima and Nagasaki and the Bikini Accident many efforts have been made to estimate the dose of survivors. However, because of various uncertainties involved in this type of estimation under the emergency conditions, the accurate estimation of the individual dose is very difficult. It was recently reported that ESR dosimetry could be applied to estimate the radiation doses of the individual using the enamel of the teeth of the survivors or material such as shell-button, sugar etc. found on the person. (author). DOSE-RESPONSE RELATIONSHIPS/probabilistic estimation ; KEYWORDS BIKINI; HIROSHIMA; NAGASAKT; RISK ASSESSMENT EDB Item 41 ANALYTIC TITLE ENGLISH Clean-up of a radioactive spill ANAL. SUBTITLE ENGLISH Soil chemistry and the lessons of Bikini Atoll TITLE ENGLISH Proceedings of the 1987 Pacific Northwest metals and Minerals conference (abstracts) SUBTITLE ENGLISH Modern mineral and metal technology ANALYTIC AUTHOR/AFFIL PAGE RANGE PUB. DATE (YYMMDD) LIMITATION CODE ABSTRACT 900544 Fish, 33 870000 UNL W. [Oregon Graduate Center, Beaverton, OR (US) ] Bikini Atoll in the Marshall Islands of the South Pacific was extensively contaminated with radionuclides deposited by thermonuclear weapons testing in the 1940s and 1950s. In recent years, the U.S. government has attempted to restore the habitability of the islands by cleaning up the remaining radioactive material. Although the island no longer presents an acute radiation risk to inhabitants, plants growing on the island concentrate