A bill to require a plan to modernize the nuclear security enterprise.

This bill requires the Nuclear Security Administrator to create a detailed modernization plan within 90 days. The plan must accelerate replacing aging nuclear storage and handling facilities (Material Staging Capabilities) with cost estimates and speed up key project milestones by 2026. It also mandates concurrent work with an existing high explosives infrastructure program, including the ongoing High Explosives Synthesis facility project. The Administrator must then brief relevant congressional committees (Armed Services and Appropriations panels in both chambers) on the plan within 180 days. The bill directly affects the U.S. nuclear security infrastructure and its operational planning.