I love what you're preaching, but I actually worked on something similar to what you're describing (just not for nuclear reactors, but something else famously dangerous). Ultimately the company footing the bill decided to axe the project because they decided they'd rather send people into a deadly environment rather than continue to pay for the R&D to develop the robot.

> When looking at robotics is also good to consider not just economics but safety.

The problem is the companies paying for the robots only care about economics, at least in my experience. I'm glad your experience differs from mine.