EN1(2) Radioactive Materials Inventory

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BC Hydro and Powertech Labs use small, sealed radioactive sources contained inside measuring devices and spark arresters. The sources can use one of a number of radionuclides including Tritium, Strontium-90, Nickel-63, Cesium-137, and Amercium/Beryllium-241. Actual activity is less than maximum shown due to radioactive decay. BC Hydro's radioactive materials inventory continues to decline as old equipment is retired and non-radioactive substitutes are found. As of March 31, 2004, all sources were operated in compliance with licences and regulations issued by the Canadian Nuclear Safety Commission. A megabecquerel is a unit of radioactivity representing one million atomic disintegrations per second. Projections are italicized.