Initial Global Development and Licensing of the CANDU-6 ISTS

The nuclear industry in the USA recognized a need to improve technical specifications (TS) after the Three Mile Island (TMI) accident, and an improvement program was therefore initiated in 1984. The NRC issued several improved standard technical specifications (ISTSs) for typical nuclear reactors. In Canada, the CANDU Owner's Group (COG) issued the Safe Operating Envelope (SOE) principles and guidelines, and Canadian utilities initiated SOE projects on the basis of the COG guidelines, which were converted to the CSA N290.15 specification in 2010. The goal in the development of Wolsong CANDU-6 ISTS is to improve plant safety practically by formulating safe Limiting Conditions for Operation (LCOs), improving the actions and surveillance requirements pertaining to safety and operability, and reinforcing technical bases to enable the first CANDU-6 ISTS to be developed and licensed anywhere in the world