A laminated, 57 cm tall by 37 cm wide, poster made as a copy of a gouache painting presented to Eric LeSurf of Chalk River in 1978 when he left AECL to join London Nuclear. Eric had been a key player in the development at Chalk River of the CAN-DECON process – a process developed to chemically reduce the crud and the associated radiation load in CANDU reactor components. London Nuclear was a private company that commercialized the process and, under Eric’s leadership, successfully applied it to reactors world-wide. Derek Lister, who painted the poster, was a co-worker of Eric’s in the development of CAN-DECON. He later left AECL for the position of Research Chair in Nuclear Engineering at the University of New Brunswick and in 2020 was honoured by being made a Member of the Order of Canada.