[en] The Australian Radiation Laboratory has the authority to maintain primary standards of the quantity exposure and secondary standards of the quantity absorbed dose. A common system for calibration of dosemeters throughout Australia is being developed. It is proposed that each state be issued with a set of encapsulated ₁₃₇Cs sources encased in a shielded container providing collimated beams having exposure rates of 30 μR/h to 300 mR/h at 1 meter. To extend the facility to x rays an ionization chamber with measuring assembly would be included