Ionising Radiations Regulations 2017 (IRR17) Guidance - Part 2 - General Principles and Procedures
Part 2 of the IRR17 covers the key principles of radiation protection including risk assessment, restriction of exposure, maintenance of engineering controls, dose limitation (dose limits) and contingency. Regulations (5)-(7) of IRR17 introduce a new regime for informing HSE about work with ionising radiation namely notification (low risk), registration (medium risk) and consent (highest risk).
Radiation is one of the important factors in evolution. It causes mutation, and some level of mutation is actually good for evolution