| Autor: |
Mohammad Eshraqi, Mathias Brandin, Hakan Hahn, Mats Lindroos, Daniela Ene, Steve Peggs |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Progress in Nuclear Science and Technology. 2:382-388 |
| ISSN: |
2185-4823 |
| Popis: |
The present paper reports first estimates of the radiation protection shielding required for the machine and provides a preliminary characterization of the residual radiation field inside the accelerator tunnel. In this respect two scenarios were analyzed: (a) an accidental full beam loss during 1 s every day and (b) continuous beam loss of 1 W m{sup -1}, representing normal operation conditions. Representative loss positions along the accelerator at variable energies were investigated using a simplified geometry model of the linac to assess the lost proton beam prompt radiation field. Dedicated Monte Carlo (MC) simulations with PHITS and MCNPX2.6.0 codes were performed to analyze the propagation of neutrons through the tunnel shield wall and its surroundings. The induced radioactivity in the accelerator components, concrete walls, and air inside the tunnel were estimated using the DCHAIN and CINDER'90 code based on an external neutron source and spallation products derived from MCNPX. Ambient dose equivalent rates due to the residual radiation were calculated with the MCNPX code using photon sources resulting from CINDER. (author) |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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