 The ICRP is a not-for-profit organization registered as a charity in the United Kingdom and has its scientific secretariat in Ottawa, Ontario, Canada.It is an independent, international organization with more than two hundred volunteer members from approximately thirty countries on six continents, who represent the world's leading scientists and policy makers in the field of radiological protection.The International System of Radiological Protection has been developed by ICRP based on the current understanding of the science of radiation exposures and effects, and value judgements.