Does water itself become activated? Or the problem is that something leaks into the water even during normal operating? Plus everything is designed to maintain

Does water itself become activated? Or the problem is that something leaks into the water even during normal operating? Plus everything is designed to maintain containment, which makes the coolant loops a lot more complicated, right? Putting a giant laser in space doesn't seems _that_ safe. The proposed space based energy things are very low efficiency. After all, you can collect enough solar power on Earth already, the problem is efficient distribution. (And if you put a big laser/maser in space that still would not be able to provide baseload if it's not always in line of sight.) And launch costs are prohibitively expensive right now. First we'd need to bootstrap a cislunar economy (eg mine and manufacture stuff in space, so we don't need to pay the launch costs from deep within Earth's gravity well): https://www.youtube.com/watch?v=gOr-Gd58zu8 https://www.youtube.com/watch?v=gOr-Gd58zu8