[en] Studies are now underway to establish initial design characteristics for the pulsed neutron source NSNS facility and to optimize the design. In this paper the methodology of calculation is presented together with the calculated facility characteristics. Optimization studies are discussed and initial results shown. (author)

[en] This Workshop covered all aspects of simulation concerning accelerator-generated fields, including the calculations of various facilities, comparisons with experiments and benchmarking efforts. Recent code development and the particle production model or cross section data were also presented and discussed as the bases of this workshop. The 35 of the presented papers are indexed individually. (J.P.N.)

[en] This paper describes studies of the attenuation in a concrete shielding wall between the LHC-B detector and its counting room in the existing cavern at Point 8 of LHC with a full Monte-Carlo simulation using the FLUKA code. The calculated dose equivalent distributions for a possible shielding wall configuration, which fulfills practical requirements for the shield design in the limited space, are presented. It is also shown that there is no significant leakage of stray radiation through the vertical shaft to the surface of the earth in the simulation. (author)

[en] The approximations of cross sections of proton, neutron and p-meson interactions with 1 ≤ Z ≤ 100 nuclei are described. The total, elastic, and inelastic interaction cross sections as well as double differential cross sections are considered in the energy range above 20 MeV with no restrictions on the upper energy limit. All approximating formulas are based on fitting the available experimental data with the use of basic theoretical models. Examples of comparison with experimental data are presented in a wide range of kinematic variables and for various secondary particles. (author)

[en] An experimental analysis has been performed for energy deposition of a lead target bombarded by 1.2 GeV protons. The analysis utilizing the LAHET code system (LCS) has shown that the LCS predicts total energy deposition values 24% in excess of that determined experimentally. Radiation environment has also been characterized for the target and discussed. (author)

[en] This paper is a compilation of the results of the recent 5 years studies of the beam dump system for the LHC proton collider at CERN, with a special emphasis on feasibility of the central absorber. Simulations of energy deposition by particle cascades, optimisation of the beam sweeping system and core layout, and thermal analysis have been completed; the structural deformation, stress and vibration analyses are well advanced, and a new concept of the shielding design has recently been approved. The material characteristics, geometry, performance parameters and safety precautions for different components of the beam dump are actually close to completion, which augurs well for the start of construction work according to schedule. (author)

[en] New calculations of the skyshine dose distribution of neutrons and secondary photons have been performed at Jefferson Lab using the Monte Carlo method. The dose dependence on neutron energy, distance to the neutron source, polar angle of a source neutron, and azimuthal angle between the observation point and the momentum direction of a source neutron have been studied. The azimuthally asymmetric term in the skyshine dose distribution is shown to be important in the dose calculations around high-energy accelerator facilities. A parameterization formula and corresponding computer code have been developed which can be used for detailed calculations of the skyshine dose maps. (author)

[en] The estimation of the radiation environment for the POINT2 of the LHC, where it is planned to locate the ALICE detector, is presented. The radiation environment has been studied for two points of accidental beam losses. The dose level in the region of the counting rooms is lower than the recommended CERN limit 50 mSv. The radiation level behind the access shielding at the air-duct chicane is not higher than 10 mSv that is also appropriated for the use of this area as a public area. A more complicated situation is in the machine by-pass region. The dose level in the tunnel is a few hundreds of mSv and decrease of this level could be achieved by increasing the wall or the beam pipe shielding thickness. (J.P.N.)

[en] High Energy Accelerator Research Organization in Japan (KEK) is constructing facilities for a neutrino oscillation experiment, of which the main facilities comprise a target station for pion production and its decay volume, utilizing the current 12 GeV-proton synchrotron. Since these facilities are constructed underground through several strata, soil and ground water activation must be considered for the shielding design with maximum achievable reduction of the induced activity. Using hadron fluence calculated with the MARS Monte-Carlo code, radio-activities induced in the soil shieldings were found to determine the thickness of concrete and iron shields. (author)

[en] A soil benchmark experiment was conducted using secondary particles produced by 12 GeV protons. Hadron fluence was determined by measuring induced activities of ²²Na in the aluminum flux monitors. The experiment was simulated by the MARS Monte-Carlo code. It has been concluded that the calculated values of fluences and induced activities were consistent with the experimental values. (author)