AbstractPreliminary radiation protection design of Large Helical Device (LHD) was performed. At first, neutron source strength was estimated. Then, shield wall thickness was designed to match the dose limitation of non-controlled area. Shield door was checked from the simple slit streaming calculation. Duct streaming contributions are calculated to estimate the doses at the cellar and the adjacent room. Finally neutron and γ-ray skyshine was calculated. Air and water radioactivity were estimated to decide controlled area. Activation of the device was estimated for accessibility consideration after operation.
Inboard shield optimization and divertor shield design for tiber-II