5.6.3                 Between PDR and CDR

a.              Before CDR, it shall be verified that the final radiation values, considering the uncertainties and conservatism in the environment, shielding and parts evaluation, are compatible with the specified project-specific overall and component-specific MRDM.

NOTE 1      The RHA process defines the reporting expected at this stage (normally radiation analysis, including shielding).

NOTE 2      For components that are non-compliant with the MRDM at this stage, detailed 3-D shielding calculations can be employed to improve the fidelity of the calculation of the radiation level, or as the basis of a supplier Request for Waiver on the MRDM. The methods employed can be full and detailed sectoring or full Monte-Carlo radiation transport analysis as specified in clause 6.2.4, including a geometrical analysis of the unit, its surroundings and the spacecraft structure.