(a) For the particles with Z = 1 to Z = 26 the ratio of their contribution in the integrated flux of the spacecraft internal field over their contribution in the integrated flux of the GCR field is shown. (b) The relative contribution of the particles in the integrated flux of the spacecraft’s internal radiation field is presented. (c) The relative contribution to dose in water of the particles of the spacecraft internal radiation field. (d) Energy spectra for gammas, neutrons, electrons, and positrons, which are the most abundant species in the internal field.