Study on passive shutdown feature for fast reactor

Study on passive shutdown features has been carried out to establish the safety philosophy for fast reactor which is easily understood by the public toward the realization of commercial fast reactor. The results of this study up to now are as follows: (1) We proposed a procedure for selecting promising passive shutdown measures and for finding out the appropriate combination of measures. Based on this procedure we recommended examples of combination of measures. (2) Characteristics related to the static reactivity and the transient plant response for some promising passive shutdown measures were quantified. Conceptual designs were carried out for these measures. (author)