This standard review plan (SRP) provides guidance to the staff of the U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Reactor Regulation and Office of Nuclear Material Safety and Safeguards, on how to evaluate requests to release part of a power reactor facility or site for unrestricted use prior to NRC approval of the facility's license termination plan (LTP). This type of release is referred as a "partial site release" (PSR). The associated regulatory requirements are contained in Title 10, Section 50.83, "Release of Part of a Power Reactor Facility or Site for Unrestricted Use," of the Code of Federal Regulations (10 CFR 50.83). This SRP presents evaluation and acceptance criteria for the review of PSR applications submitted by licensees. In so doing, this SRP identifies technical areas for review, information to be submitted by licensees, regulatory requirements and guidance, and evaluation criteria for use in assessing compliance with the regulations. Although the main focus of this guidance is directed to the NRC staff's review process, this SRP presents information that licensees and applicants may find useful. Another important purpose of the SRP is to make information available so that the public has a better understanding of the staff's review process and criteria for rejecting or accepting such requests.