NEW YORK–(BUSINESS WIRE)–Hadron Energy, Inc. (“Hadron” or “Company”), a developer of advanced nuclear microreactors, announced the submission of its Principal Design Criteria (PDC) White Paper for Hadron’s Halo Modular Microreactor (Halo MMR) to the U.S. Nuclear Regulatory Commission (NRC) as part of the formal pre-application engagement process under 10 CFR Part 52 (Project No. 99902144). The submission, dated April 10, 2026, formalizes the technical and safety framework that will govern all