All these extra methods of preserving water adds cost, to a technology where paid off plants are struggling. Let alone ruinously expensive new builds.

At least these installations don't need to deal with radioactive material directly, so they will have the same financial infact as similar improvements to, say, coal-fired power plants.

They don't materially affect the cost of a nuclear power plant. Cooling towers or evaporating ponds are not expensive. Coal and gas power plants also use them.

You just can't easily retrofit them onto an _existing_ power plant.