; and (II) would materially change the prior findings or conclusions. (3) Production or utilization facility located at an existing site In reviewing an application for an early site permit, construction permit, operating license, or combined construction permit and operating license for a proposed production facility or utilization facility that is to be located at the site of an already licensed production facility or utilization facility, the Commission shall, to the extent practicable, use information that was part of the determination to issue a license for the already licensed production facility or utilization facility. (4) Hearing on early site permit, construction permit, and combined construction permit and operating license (A) In general The Commission shall issue and make immediately effective an early site permit or construction permit for a production facility or utilization facility upon the Commission’s finding that the application therefor satisfies the requirements of this Act, notwithstanding any outstanding request for a hearing for such license. (B) Appropriate action Following completion of any required hearing, the Commission shall take any appropriate action with respect to the early site permit, construction permit, or combined construction permit and operating license to the extent necessary to account for the hearing results. (5) Early site permit defined In this subsection, the term early site permit has the meaning given such term in section 52.1 of title 10, Code of Federal Regulations (as in effect on the date of enactment of this subsection). . (f) Definitions In this section: (1) Advanced nuclear reactor The term advanced nuclear reactor means a nuclear fission or nuclear fusion reactor, including a prototype plant (as such term is defined in section 50.2 or section 52.1 of title 10, Code of Federal Regulations, as in effect on the date of enactment of this section), with significant improvements compared to a commercial nuclear reactor that is under construction as of the date