A framed, 61 cm tall by 80 cm wide, oil painting described by the artist, Derek Lister as; “An original oil painting inspired by the high-temperature water loop in Building 250 that was used for the first experimental research contract from EPRI in about 1982.” Derek Lister was a Chemical Engineer at Chalk River. He later left AECL for a 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. The painting is titled 250 HS – in deference to Building 250.