I'm not sure I follow. "High Energy" has a very specific meaning in physics, which typically refers particle physics, which may include nuclear physics but woul

I'm not sure I follow. "High Energy" has a very specific meaning in physics, which typically refers particle physics, which may include nuclear physics but would definitely not include the UV spectrum. Energy, in the photonic radiation sense sense, refers quite literally to the wavelength of a photon. UV is not high energy. It's the energy of a photon which is the bad stuff for cancer. UV is energetic enough to damage molecular bonds, but that's easily mitigated through clothing (which workers _already_ wear) and titanium dioxide, which completely absorbs those photons. You are right that both hazards for cancer risks in both plans are well understood, but one is mitigated by spending hundreds of millions of dollars of equipment, construction, water, a regulatory commission, constant improvement of procedure and policy, education, and clever engineering. The other requires long sleeve shirts and a hat.