The purpose of this Report is to provide design guidelines for radiation protection, and to identify those aspects of radiological safety that are of major, or even unique, importance to the operation of particle accelerator installations and to suggest methods by which safe operation may be achieved. The report is written from an engineering physics viewpoint and is intended to be useful to those engaged in the design and operation of accelerators, particularly in smaller institutions and organizations that do not have a large radiological-protection staff.