In energy resources, hydrogen: the physical removal of equipment or material used that are no longer needed including management and handling of waste generated in the operation of the Hydrogen Energy facility [Section 4(c), DOE Department Circular No. DC2024-01-0001, Providing a National Policy and General Framework, Roadmap, and Guidelines for the Hydrogen in the Energy Sector]
In nuclear energy: the emplacement of radioactive waste in an appropriate facility without the intention of retrieval [Section 5(j), Philippine National Nuclear Energy Safety Act of 2025]