I don’t know that a neutron warhead would do it - they are relatively small devices that are tuned to produce deadly neutrons in very great numbers while minimizing blast. This is not the same as tuning a device to produce the E1 or E3 pulse. Nonetheless, I like your way of thinking - no one needs to blast the nuke plant and its fuel to dust, just destroy all electrical output in a large part of Iran and you’ll have the same impact with far less radiation.
I admit that I’m not as well versed regarding neutron warheads as other traditional weapons in our inventory, and I appreciate your elaborating on what I was only able to suggest in general terms.
Personally I’ve always been in favor of adding Tehran to Hiroshima and Nagasaki in the history books, one reason is because those little pricks desperately are in need of a smackdown, and demonstrating to the rest of the world that we still have the capability AND the balls to use the same type of weapon today as we did on the Japanese in ‘45 wouldn’t hurt a bit.
Of course with the current simpering sap in the White House, Iran has nothing to worry about.