International
Tables for Crystallography Volume C Mathematical, physical and chemical tables Edited by E. Prince © International Union of Crystallography 2006 
International Tables for Crystallography (2006). Vol. C, ch. 10.2, pp. 962963

The codification of rules for the safe operation of highenergy particle accelerators is not simple because the various ionizing radiations produced by them require different protective procedures.
Particle accelerators ought to be operated in an enclosure from a remote control room in which the dose equivalent rate does not exceed 25 mSv h^{−1}. A lower dose rate (2.5 mSv h^{−1}) is required in adjacent areas used by nonradiation workers.
The probability of mixed radiations (e.g. Xrays and neutrons) coexisting makes servicing hazardous and all maintenance should be performed under the supervision of the RSO.