title: The refined shielding design for the cyclotron room of the Buddhist Tzu Chi General Hospital.
abstract: Full-scale Monte Carlo simulations of the cyclotron room of the Buddhist Tzu Chi General Hospital were carried out to improve the inadequate maze design. The double differential neutron source from the 18O(p,n)18F reaction was adopted for the calculation. The weight window variance reduction technique, where the weight window was set by applying the adjoint flux, has been implemented in the MCNP run to facilitate the calculation of the dose rates outside the cyclotron room. Dose rates including neutron and gamma-ray components were calculated for some maze shielding modifications.
authors.affiliation: Department of Engineering and System Science, National Tsing Hua University, Hsinchu 300, Taiwan, ROC.
authors.forename: R D
authors.initials: RD
authors.lastname: Sheu
authors.forename: C C
authors.initials: CC
authors.lastname: Chen
authors.forename: R J
authors.initials: RJ
authors.lastname: Sheu
authors.forename: C H
authors.initials: CH
authors.lastname: Kao
authors.forename: S H
authors.initials: SH
authors.lastname: Jiang
mesh_terms: D003198:Computer Simulation; D017357:Cyclotrons / Q000295:instrumentation*; D004867:Equipment Design / Q000379:methods; D019544:Equipment Failure Analysis / Q000379:methods; D005160:Facility Design and Construction / Q000295:instrumentation / Q000379:methods*; D005720:Gamma Rays; D006769:Hospitals, General; D015233:Models, Statistical; D009010:Monte Carlo Method; D009502:Neutrons; D010315:Particle Accelerators / Q000295:instrumentation*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods*; D011835:Radiation Protection / Q000295:instrumentation* / Q000379:methods*; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D013624:Taiwan