[en] This paper outlines the safety approach being taken in CANDU reactor development The CANDU Pressurized Heavy Water Reactor (PHWR) has been successful both in Canada and internationally. Currently there are twenty-two CANDU plants operating in Canada, and two in Korea and Argentina. There are also five CANDUs under construction in Romania, and three in Korea. In terms of capacity factor, three to four of the top ten reactors in the world have consistently been CANDU. Operating CANDUs span two size ranges: the single-unit 650MWe class CANDU 6 (and its multi-unit variant at Pickering in Canada), and the 900MWe class Bruce/Darlington design. Multiple-unit 900MWe class CANDUs provide over half of the electricity for the Province of Ontario, in Canada; the CANDU 6 class has been used both in Canada and internationally. CANDU design for the future is based on a step-by-step evolutionary approach, building on the strengths of the CANDU concept, and on proven technology. CANDU safety development is consistent with this approach. The priorities for safety development are 'good-neighbour' operation; prevention of accidents; strengthening of CANDU's defence in depth for mitigation of severe accidents. Licensing of CANDU is in keeping with the trend to global consistency. CANDU's versatility is demonstrated by the success being achieved today in achieving and maintaining licensability in widely varying jurisdictions.