Memorandum from the British Committee on Radiation Units and Measurements

In summary, it is recommended that: (i) The three operational quantities defined by ICRU, namely ambient dose equivalent, directional dose equivalent and personal dose equivalent, should be used for measurement in radiation protection. (ii) The values of these quantities should, for the present, be based on values of Q recommended in ICRP Publication 26 (ICRP, 1977). (iii) The values of organ weighting factors, wT, recommended in ICRP Publication 26 (ICRP, 1977) should, for the present, be retained. (iv) The operational quantities should not be modified to incorporate the values of Q recommended in ICRP Publication 60 (ICRP, 1991) until it has been demonstrated that they are satisfactory indicators of the limiting quantities defined in ICRP 60. (v) Any changeover to the new values of the operational quantities should take place on a defined date. Membership of BCRU during the preparation of this memorandum was: T E Burlin (Chairman), R J Berry (Vice-Chairman), M J Rossiter (Secretary), J A B Gibson, D T Goodhead, J R Harvey, J B Hunt, S C Lillicrap, T O Marshall, A E Nahum, C H Paine, D I Thwaites, D R White, A Wilson and T O Young.