Radiation shielding in SPring-8 linear accelerator tunnels for safety interlock system upgrade

Nobuteru Nariyama
2014 Progress in Nuclear Science and Technology  
To upgrade a safety interlock system, a restricted area was converted into an accessible area at an operating condition. To judge the necessity for an additional shield design, -ray and neutron dose distributions were measured in the linac, booster synchrotron, L3BT, and New SUBARU (NS) areas. In the linac, chicane was found to be the main source of rays. Among the new accessible areas, the -ray doses exceeded the limit at the electron transport openings of the synchrotron and NS areas.
more » ... n and NS areas. Similarly, the neutron dose surpassed the limit at the synchrotron opening. The beam-dump contribution to the neutron dose was estimated to be 20% by using the Monte Carlo code FLUKA.
doi:10.15669/pnst.4.257 fatcat:yvavw5pzbrfddosafzseawidlq