Over the last 50 years particle accelerators have evolved from simple devices to powerful machines, and will continue to have an important impact on research, technology and lifestyle. Today, they cover a wide range of applications, from television and computer displays in households to investigating the origin and structure of matter. It has become common practice to use particle accelerators for material science and medical applications. In recent years, requirements from new technological and research applications have emerged, giving rise to new radiation shielding aspects and problems. These workshop proceedings review recent progress in radiation shielding of accelerator facilities, evaluating advancements and discussing further developments needed with respect to international co-operation in this field.

Foreword
Executive Summary
Appendix 1 - Agenda
Appendix 2 -Expert Group on Shielding Aspects of Accelerators, Targets, and Irradiation Facilities
Appendix 3. Brief Summary of the Workshop on Models and Codes for Spallation Neutron Sources
Session I. Proton and Ion Accelerator
-Threshold Reaction Rates Inside and on the Surfaceof thick W-Na Target Irradiated with 0.8 GeV Protons by YuE. Titarenko, O. V.Shvedow, V. F.Batyaev, E. I. Karpikhin, V. M. Zhivaun, A. B. Koldobsky, R. D. Mulambetov, D. V. Fishchenko, S. V. Kvasova, A. M. Voloschenko, S. G. Mashnik, R. E. Prael, H. Yasuda
-Spectral Measurements of Neutrons from Pb, W. and Na Targets Irradiated by 0.8 and 1.6 GeV Protons by Yu. E. Titarenko, O.V. Shvedov, Yu. V. Trebukhovsky, V. F. Batyaev, V. M. Zhivun, D. V. Fishchenko, V. A. Korolyov, G. N. Smirnov, S. G. Mashnik, R. E. Prael, A. J. Sierk, and H. Yasuda
-Production of Radioactive Isotopes in Molasse by H. Vincke and G. R. Stevenson
-Neutron Production from Thin and Thick Targets by High-Energy Heavy Ion Bombardment by T. Nakamura, H. Sato, H. Iwase, T. Kurosawa, N. Nakao, Y. Uwamino and A. Fukumura
-Study of Residual Product Nuclide Yields in 1.0 GeV Proton Irradiated 208Pb and 2.6 GeV Proton Irradiated natW Thin Targets by Yu. E. Titarenko, O. V. Shvedow, V. F. Batyaev, V. M. Zhivun, E. I. Karpikhin, R. D. Mulambetov, D. V. Fischenko, S. V. Kvsova, S. G. Mashnik, R. E. Prael, A. J. Sierk, and H. Yasuda
Session II. Electron Accelerator and Photon Sources
-Synchrotron Radiation Facilities
--The Linac Coherent Light Source by N. E. Ipe, S. Mao, A. Fasso, J.Arthur, A. Toor, R. Tatchyn, and D. Walz
--Shielding Issues Around the ESRF Storage Ring by P. Berkvens and P. Colump
-High-Energy Electron Machines
--Radiation Studies forthe Environmental Protection at the Beam Delivery Systm of the Next Linear Colllider by S. H> Rokni, J.C. Kiu, S. Roesler
--Radiation Damage to Electronics in the Beam Tunnel of the Next Linear Collider by S. Roesler, J. C. Liu, and S. H. Rokni
--Calculation of Hadron Yields around thick Targets and Doses Behind Concrete Shielding of High-Energy Electron Accelerators by A. Leuschner, H. Dinter, K. Tesch, D. Dworak, and J. Loskiewicz
Session III. High Intensity Medium-Energy Accelerators
-Comparative Study of the Direct and Converter Methods for High Fission Yields by D. Ridikas, W. Mittig, and A. C. C. Villari
-Study of Residual Product Nuclide Yeilds from 0.1, 0.2, 0.8, and 2.6 GeV Proton-Irradiated natHg Targets by &u E. Titarenko, O.V. Shvdov, V. F. batyaev, V. M. Zhivun, E. I. Karpikhin, R. D. Mulambetov, D. V. Fischenko, S. V. Kvasova, S. G. Mashnik, R. E. Prael, A. J. Sierk, and H. Yasuda
-Activation Studies and Radiation Safety for the n_TOF Experiment by V. Lacoste, A. Ferrari, M.Silari, and V. Vlachoudis
Session IV. Shielding Benchmark Calculations and Results
-Intercomparison of Medium Energy Neutron Attenuation in Iron and Concrete by H. Kirayama, Attenuatio Length Sub-Working Group in Japan
-Deep Penetration Calculations of Neutrons up to 1.5 GeV by H. Handa, R. Tayama, K. Hayashi, H. Nakashima, Y. Sakamoto, N. Sasamoto, T. Abe, and K. Yamada
-Deep Penetration Experiment at ISIS by N> Nakao, T.Shibata, T. Nunomiya, T. Nakamura, E. Kim, T. Kurosawa, S. Taniguchi, M.Sasaki, H. Iwase, Y. Uwamino, S. Ito, P. Wright, and D. R. Perry
-A High Energy Neutron Depth-Dose Experiment Performed at the LANSCE/WNR Facility by M. R. Sutton, N. E. Hertel, and L. S. Waters
-Benchmark Experiments of Absorbed Dose in a Slab Phantom for Several Tens MeV Neutrons at the TIARA Facility by Y. Nakane and Y. Sakamoto
-Benchmark Calculation with Simple Phantom for Neutron Dosimetry by N. Yoshizawa, Y. Sakamoto, S. Iwai, and H. Hirayama
-Current Status of a Low-energy Photon Transport Benchmark by H. Hirayama, S.Ban, Y. Namito
-Benchmarking of