The U.S. Nuclear Regulatory Commission (NRC) has released updated guidance, known as Interim Staff Guidance (ISG), for managing the aging of reactor vessel internal components in pressurized-water reactors. This new guidance revises older documents to help both those applying for license renewals and NRC staff by clarifying and adding new information. Public comments were considered in the development of this final version, but the new guidance is not mandatory. This update will assist in the preparation and review of future license renewal applications more efficiently.
Simple Explanation
The NRC has come out with new rules to help keep parts inside certain power plants safe as they get older. These rules make it clearer what needs to be checked and fixed, so plants can keep running safely.