This report updates icrp publication 28 with respect to principles and procedures for handling emergency and accidental exposures of workers and by laying out the principles of monitoring for external radiation completely replaces icrp publication 35. Icrp publication 28 the principles and general procedures for handling emergency and accidental exposure of workers. The principles and general procedures for handling emergency and accidental exposures of workers a report of committee 4 of the international commission on radiological protection. Health surveillance of workers and the management of overexposed individuals are considered this report updates icrp publication 28 with respect to principles and procedures for handling emergency and accidental exposures of workers and by laying out the principles of monitoring for external radiation completely replaces icrp publication 35