US nuclear rules will now expire automatically unless renewed

US nuclear regulators will now add an expiration date to some of their rules. This means that if a rule is not actively reviewed and renewed, it will automatically disappear.

This change means that old rules, even ones that no longer make sense, will not stay on the books forever. Regulators will have to justify each rule periodically, or it will vanish. This could speed up the approval of new nuclear technologies that were previously held back by outdated regulations.