The hadron experimental facility has been constructed as one of two experimental facilities at the J-PARC Main Ring. It utilizes a high-intensity proton beam with a power of 750 kW in maximum and provides various secondary beams for nuclear and particle physics experiments. In order to handle the high-power proton beam, the maintenance scheme must be carefully considered in the designs of the facility and its components. In this paper, the maintenance scenarios in the facility are described and beam-line equipments with sufficient radiation hardness we developed are briefly introduced.

Construction of the Central Japan Synchrotron Radiation Facility has been completed in the Aichi area of Japan, and the beam commissioning was started in spring of 2012. Up to now, it is confirmed that the 1.2 GeV storage ring works with 300 mA Top-up mode. In this paper, the progress of beam commissioning and present status of accelerators are reported.

An accelerator-based BNCT（Boron Neutron Capture Therapy）facility is being constructed at the Ibaraki Neutron Medical Research Center. It consists of a proton linac（8 MeV energy and 10 mA average current), a beryllium target, and a moderator system to provide an epi-thermal neutron flux for patient treatment. The technology choices for this present system were driven by the need to site the facility in a hospital and where low residual activity is essential. The maximum neutron energy produced from an 8 MeV-proton is 6 MeV, which is below the threshold energy of the main nuclear reactions which produce radioactive products. The down side of this technology choice is that it produces a high density heat load on the target so that cooling and hydrogen blistering amelioration prevent sever challenges requiring successful R&D progress. The latest design of the target and moderator system shows that a flux of 2.5×10⁹ epi-thermal neutrons/cm²/sec can be obtained. This is two times higher than the flux from the existing nuclear reactor based BNCT facility at JAEA（JRR-4).