Radiation safety issues of high power proton accelerator for regulation body

Full text: Recently remarkable high power proton accelerators have been constructed in several countries for neutron application or particle physics. The beam powers of those accelerators are over 1 MW, which is equivalent to one of old type small research reactor. In the view of beam power, those are treated by serious regulation system. However the risk level to human society and environment is small relatively because of the inherent property of accelerator. In Korea, a high power proton accelerator is in construction and a regulation boy needs the evaluation tool of the radiation safety of the accelerator. The issues are categorized by six-safety terms: 1) Inspection measure; 2) Shielding analysis and activation estimation; 3) Accident evaluation (beam loss scheme); 4) Operation policy (to reduce worker's exposure); 5) Decommissioning; and 6) High energy radiation measurement. The design and policy concepts, which have been determined or are proposed by the design group of each high power accelerator (JPARC, SNS, EURISOL, CSNS, PEFP) are analyzed and compared for each issue. Finally a standard idea and methods are developed in this study and suggested for Korean regulation body. Those will be discussed in the view of practical application. (author)