Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced the appointment of Paula Whitten-Doolin as the Company's General Counsel, effective immediately.

Deep Isolation Nuclear, Inc. (“Deep Isolation”), a leading innovator in nuclear waste disposal technology, today announced the launch of its multi-year, full-scale, at-depth deep borehole demonstration program (the “Demonstration Program”), in collaboration with the Deep Borehole Demonstration Center (“DBDC”), Halliburton (NYSE: HAL), Amentum (NYSE: AMTM), NAC International, and Occlusion Nuclear Solutions, to conduct testing of its deep borehole technology for safely and permanently disposing of nuclear waste.

Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced the appointment of Ralph L. Hunter to the Company’s Board of Directors, effective immediately.

Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced the successful completion of Project SAVANT (Sequential Advancement of Technology for Deep Borehole Disposal), a two-year research initiative funded by the U.S. Department of Energy Advanced Research Projects Agency–Energy (ARPA-E). The project found that Deep Isolation’s Universal Canister System (UCS) and borehole casing materials can sufficiently resist corrosion to safely store nuclear waste material, further validating the design and advancing the Company toward a full-scale deep borehole disposal demonstration.

Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced the completion of Project UPWARDS which advances the development of a first-of-a-kind integrated waste management system for advanced reactors. Delivered on time and on budget with grant support from the U.S. Department of Energy (DOE) Advanced Research Projects Agency–Energy (ARPA-E) initiative, this three-year project has culminated in the manufacture, physical testing and validation of the world’s first disposal-ready Universal Canister System (UCS) for spent nuclear fuel and high-level radioactive waste from advanced reactors.

Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, announced that Kent Cole, CEO of NAC International, Inc (“NAC”), a subsidiary of Kanadevia Corporation (TYO: 7004), resigned effective today from the Deep Isolation Board of Directors after serving since 2020. As NAC and Deep Isolation become more active in their collaboration on Deep Isolation’s multi-year end-to-end demonstration program, Cole will step away from his Board position to maintain clear governance and operational boundaries, consistent with best practices.

Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced the appointment of Renée Hornbaker to its Board of Directors, effective immediately.

Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced the submission of its response to the National Association of State Energy Officials’ (NASEO) consultation on its Advanced Nuclear First Movers Orderbook Strategy.

Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today announced the appointment of Christa Steele to its Board of Directors, effective immediately.

Berkeley, CA, September 30, 2025 – Deep Isolation Nuclear, Inc. (“Deep Isolation” or the “Company”), a leading innovator in nuclear waste disposal technology, today confirmed the restart of its U.S. Trade and Development Agency (USTDA)–funded feasibility study to assess the viability of deep borehole disposal of Bulgarian spent nuclear fuel.