56Certain incidents taken to be radiation incidents

56 Certain incidents taken to be radiation incidents

56 Certain incidents taken to be radiation incidents

(1) For this regulation, a radiation incident is taken to have occurred if—

(a) there is an unplanned or unexpected emission of, or exposure to a person of, radiation, including as a result of—

(i) the spillage or leakage of a radioactive substance, or

(ii) damage to, or the malfunctioning of, an ionising radiation apparatus or sealed source device, and

(b) it is likely that—

(i) one or more persons have, or could have, received an effective dose of radiation of at least—

(A) for an occupationally exposed person—5 mSv, or

(B) otherwise—1 mSv, or

(ii) the premises or the environment may have become contaminated within the meaning of the Act, section 21(4).

(2) A radiation incident is also taken to have occurred if the use of a radioactive substance, ionising radiation apparatus or sealed source device for medical purposes results in one or more of the following—

(a) the administration of a radioactive substance for diagnostic purposes at an activity that exceeds the activity prescribed by 50% or more,

(b) the administration of a radioactive substance for therapeutic purposes at an activity differing by 15% or more from the activity prescribed,

(c) the administration of radiation from an ionising radiation apparatus or a sealed source device for therapeutic purposes which differs from the total prescribed treatment dose by more than 10%,

(d) the administration of radiation from an ionising radiation apparatus for diagnostic purposes, other than in the course of delivering radiation therapy, in a quantity—

(i) of 50% or more of the initial intended dose, and

(ii) that results in a person receiving an effective dose of radiation of at least 1 mSv,

(e) the administration of radiation—

(i) to the wrong person or to the wrong part of a person’s body, and