reg 4 Principles and purposes of emergency plans
(1) The principles of intervention to which each duty holder is to have regard when drawing up an emergency plan are— (a) the necessity for the plan to respond to the particular characteristics of a given radiation emergency as those characteristics emerge; (b) the necessity to optimise protection strategies to ensure that the proposed response, as a whole, is predicted to do more to mitigate the radiation emergency and facilitate transition from that emergency than to increase its duration or consequence, taking into account— (i) the health risks arising from exposure to ionising radiation as a result of the radiation emergency, in both the long and the short term; (ii) the economic consequences of the radiation emergency; (iii) the effects of the disruption, both on the premises and the area immediately surrounding it, and on the public perception of the effects of the radiation emergency; (c) the necessity of avoiding, so far as possible, the occurrence of serious physical injury to any person; (d) the necessity of ensuring that an appropriate balance is struck between the expected harms and benefits of any particular protective measure so as to maximise the benefit of that measure. (2) The purposes of intervention to which the duty holder is to have regard when drawing up an emergency plan are— (a) to reduce or stop the release of radiation; (b) to reduce the exposure to individuals and to the environment resulting from the release of ionising radiation; (c) if necessary, to ensure that provision is made for the medical treatment of those affected by the release of ionising radiation; (d) to prioritise the implementation of the plan in relation to a person exposed to dose consequences in excess of the reference level set out in paragraph 9(1).