  Operational quantities in radiation protection are defined as conservative
estimates of the protection quantities, which are generally not accessible to
measurement. Radiation protection dosimeters and monitors are calibrated in the
operational quantities. An ICRU Report Committee works on a proposal to replace
the operational quantities for external radiation ambient dose equivalent and
personal dose equivalent by quantities which are defined in close relation to
the protection quantities. In this note, the response of dosimeters and survey
instruments for photon radiation to these new operational quantities is
evaluated.
