NRC seeks to define the term “important to safety”
The regulations in 10 CFR Part 50 on reactor safety designate some structures systems, and components as safety related.
of this group, the Nuclear Regulatory Commission routinely refers to
some non-safety-related items as “important to safety.” The NRC has
received a petition for rulemaking requesting that the agency amend its
regulations to define the term “important to safety,” and the NRC has
docketed the petition and opened it to public comment.