Author: Mayoral, A.
Paper Title Page
TUPS045 IFMIF/EVEDA Beam Dump Shielding: Optimized Design of the Front Part 1635
 
  • M. García, D. Lopez, A. Mayoral, F. Ogando, J. Sanz, P. Sauvan
    UNED, Madrid, Spain
  • J.M. Arroyo, B. Brañas
    CIEMAT, Madrid, Spain
  
  The Beam Dump of the IFMIF/EVEDA ac­cel­er­a­tor pro­to­type, de­signed to stop deuteron beam with en­er­gy up to 9 MeV and a max­i­mum beam power of 1.12 MW, needs to ful­fill ra­dio­pro­tec­tion re­quire­ments. The deuteron beam col­lides with the beam stop and neu­tron and pho­ton sources are pro­duced. The ob­jec­tive of this paper is to de­sign and jus­ti­fy the front part of the local shield­ing of the Beam Dump that com­plies with ra­di­a­tion lim­its for work­ers dur­ing beam-off phas­es. This shield­ing must allow un­re­strict­ed main­te­nance op­er­a­tions in­side the vault, where the ac­cel­er­a­tor is lo­cat­ed, after a rea­son­able cool­ing time after shut­down. In doing so, two main hand­i­caps have been over­come. On one hand, the re­li­a­bil­i­ty of the tra­di­tion­al­ly used Monte Carlo codes such as MCNPX and PHITS has demon­strat­ed to be very poor for deuteron trans­port at these low en­er­gies. In order to solve this lack, the MCUNED code using TENDL li­brary is pro­posed to be used for deuteron trans­port and the pre­dic­tion of the neu­tron and pho­ton sources. On the other hand, the lack of space in the area ded­i­cat­ed to the last part of the ac­cel­er­a­tor de­mands a spe­cial­ly op­ti­mized shield­ing so­lu­tion.