What's the NRC's problem with hormesis?
NRC has enshrined the ALARA concept and doesn't want to upset the anti-nuke crowd.
"What's the NRC's problem with hormesis?"
It is not politically correct, to consider it in establishing public policy.
Accepted conventional wisdom states that ALL radiation exposure is bad. For the NRC to accept hormesis they would have to reject 60 years of preaching. They have even forbidden nuke plant training departments from formally mentioning the subject. Also, the entire anti-nuke crowd accepts current teaching on exposure as gospel and would go on a jihad against anyone who preaches this heresy.