The decision in principle regarding the construction of a nuclear energy facility should, according to the legislator's will, serve to secure the public interest. This decision is a carrier of this interest and contains various values related to nuclear energy. The purpose of this study is to demonstrate the truthfulness of these statements. There are normative premises for issuing a basic decision, and these are the Atomic Law Act and the Act specifying the preparation and implementation of investments in the field of nuclear energy. These legal acts are based on the premise of safeguarding the public interest, ensuring adequate and optimal energy supplies, and achieving the appropriate quality of supply, distribution, and use of nuclear energy. The decision in principle initiates the preparatory activities for the construction of a nuclear energy facility and, most importantly, paves the way for the legal issuance of other decisions and the undertaking of related legal actions.