Can any knowledgeable person comment on the accuracy / balance of this claim? I distrust promotional materials, but to an ignorant lay person this is intriguin

Can any knowledgeable person comment on the accuracy / balance of this claim? I distrust promotional materials, but to an ignorant lay person this is intriguing: Standard light water reactors are proliferation-resistant by their very physics. As with uranium, plutonium is only a proliferation risk in a highly enriched form; but in a light water reactors, plutonium-240 (isotopically diluting) accumulates in a manner which renders the plutonium-239 (weapons-grade) useless. This characteristic differentiates Power Reactors (Light Water, Boiling Water) from Production Reactors (RBMK, Heavy Water Reactors). OPEN100 is based on a standard Pressurized (Light) Water Reactor.