title: Evaluation for activities of component of Cyclotron-Based Epithermal Neutron Source (C-BENS) and the surface of concrete wall in irradiation room.
abstract: The workers employed in BNCT must enter the irradiation room just after an irradiation under the condition of remaining activities. To reduce the radiation exposure for the workers, it is important to identify the origins of the activities. In this research, the activities induced on the concrete wall surface were evaluated using MCNP-5 and the measurement results of thermal neutron distribution. Furthermore, the radioisotopes produced in the moderator were identified with a High Purity Germanium detector. It was found that the activities of the wall were mainly caused by (46)Sc, (60)Co and (152)Eu, and that (24)Na and (56)Mn were mainly produced in the moderator.
authors.affiliation: Graduate School of Engineering, Kyoto University, Kyoto, Japan. masayuki.imoto@gmail.com
authors.forename: M
authors.initials: M
authors.lastname: Imoto
authors.forename: H
authors.initials: H
authors.lastname: Tanaka
authors.forename: K
authors.initials: K
authors.lastname: Fujita
authors.forename: T
authors.initials: T
authors.lastname: Mitsumoto
authors.forename: K
authors.initials: K
authors.lastname: Ono
authors.forename: A
authors.initials: A
authors.lastname: Maruhashi
authors.forename: Y
authors.initials: Y
authors.lastname: Sakurai