Behavior of iodine-131 during rinsing in-pile loop with demineralized water after fission product release experiment.

概要

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After a fission product release experiment in one of the in-pile water loops (OWL-1) of Japan Atomic Energy Research Institute, the loop was flushed with fresh water and the concentration of 131I in the water was measured to clarify the behavior of 131I remaining in the loop. When the clean up system was shut off, the 131I concentration in the water gradually increased and reached a maximum after about 3 days and then decreased at the rate cor-responding to the half-life of 131I. From the results, some equations were mathematically derived, which predict not only the variation of 131I concentration in the water, but also the relationship between the amounts of 131I in the rinsing water and on the system walls.
一般社団法人日本原子力学会の論文