抄録
The conditions necessary and sufficient for the radiation monitoring are investigated, when a considerable amount of radioactive argon is continuously released from reactors. According to the present regulation the maximum permissible concentration in air of 41A is 5×10-7μc/ml occupationally, and it is expected to be reduced before long. In any case, it is commonly regarded as necessary to detect the concentration of 41A upto about 10-8μc/ml in the case of the monitoring for the public living in the neigborhood of a reactor site. And such a detector necessarily costs much and is troublesome for the practical use, even if it is technically feasible. In this paper, it is shown on the analysis of the effect of 41A that there is the possibility to practice the monitoring for the public, only with the devices detectable for the local concentration about 10-65×10-7μc/ml and γ detectors of the standard type. It is also mentioned that the contribution of 41A to the genetic dose of the population might be detectable.
