  This work summarises the results of a comparison organized by EURADOS focused
on the usage of the ICRP Reference Computational Phantoms. This activity aimed
to provide training for the implementation of voxel phantoms in Monte Carlo
radiation transport codes and the calculation of the dose equivalent in organs
and the effective dose. This particular case describes a scenario of immersion
in a 16N beta source distributed in the air of a room with concrete walls where
the phantom is located. Seven participants took part in the comparison of
results using GEANT4, TRIPOLI-4 and MCNP family codes, and there was detected a
general problem when calculating the dose to skeletal tissue and the remainder
tissue. After a process of feedback with the participants the errors were
corrected and the final results reached an agreement of +/-5%.

Medical Physics;Computational Physics