The National Calibration Reference Centre for Bioassay and In Vivo Monitoring (NCRC) is administered by the Radiation Protection Bureau of the Canadian Federal Department of Health. It was created in 1982 through a Memorandum of Understanding (MOU) signed between the regulator of the nuclear industry, the Canadian Nuclear Safety Commission (CNSC), formerly the Atomic Energy Control Board, and the Department of Health with the specific mission of providing 'practical reference standards' for measurements used for internal dosimetry. Two other Reference Centres were created at the same time. These were to have equivalent roles for (1) external dosimetry and (2) radon and radioactive atmospheres, and were administered, respectively, by the Canadian National Research Council and the federal Department of Energy, Mines and Resources. The choice of the three agencies to act as Reference Centres was based on their expertise acquired over years of work in their respective fields and the fact that they operate independently of both the CNSC and the nuclear industry. The National Calibration Reference Centre for Bioassay and In Vivo Monitoring (NCRC) is administered by the Radiation Protection Bureau of the Canadian Federal Department of Health. It was created in 1982 through a Memorandum of Understanding (MOU) signed between the regulator of the nuclear industry, the Canadian Nuclear Safety Commission (CNSC), formerly the Atomic Energy Control Board, and the Department of Health with the specific mission of providing 'practical reference standards' for measurements used for internal dosimetry. Two other Reference Centres were created at the same time. These were to have equivalent roles for (1) external dosimetry and (2) radon and radioactive atmospheres, and were administered, respectively, by the Canadian National Research Council and the federal Department of Energy, Mines and Resources. The choice of the three agencies to act as Reference Centres was based on their expertise acquired over years of work in their respective fields and the fact that they operate independently of both the CNSC and the nuclear industry.