We tried it back in in 1961 and later in 1964 - Project Pluto.
Didn’t work then, won’t work now.
It did work then, and will work better now, because back then, people had to fly it. They would have gotten radiation poisoning. Now, we can design electronics to work in large neutron fields. I have designed electronics myself that would survive a 1Mrad dose. It can be done. They could do it.