On 2018-07-13, New Brunswick Power and NB Government agreed to build, own and operate a SSR-W300, with New Brunswick and Moltex each funding CAD $5,000,000 towards development. Moltex Energy's North American headquarters is in Saint John, NB.

Moltex is currently part way through Phase 1 of 2 of Canadian Vendor Design Review.

They are one of eight reactor designs competing for about 56 million pounds in funding in the UK.

In 2016, Moltex talked to Nuclear Energy Insider and said their overnight capital cost would be under $2/W based on an independent cost estimate by a leading UK engineering firm. Further reductions to this overnight cost are expected for modularised construction. For comparison, the capital cost of a modern pulverized coal power station in the U.S. is $3.25/W and the cost of Hinkley Point C is $7.46/W.

$2 per watt capital costs are about the level of cost that China has for nuclear plant construction.