11.2.3 Operational quantities

11.2.3.1 General

a. The following operational quantities shall be used for the assessment of radiation exposure:

1. the ambient dose equivalent, H*(d)

2. the directional dose equivalent, H¢(d,Ω)

3. the personal dose equivalent, H_P

4. the quality factor, Q

NOTE Operational quantities are measurable. They are defined by the International Commission on Radiation Units and Measurements (ICRU) with the aim of never underestimating the relevant protection quantities, in particular the effective dose, E, under conventional normally-occurring exposure conditions.

11.2.3.2 Value of the quality factor, Q

a. The values of the quality factors given in Equation (3) shall be used.

(3)

NOTE These values, related to the unrestricted LET in water, correspond to the ones given by equation below, which is established by ICRP-60 [11].