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HB 2456

small modular reactors; zoning; co-location

57th Legislature - Second Regular Session Introduced by Justin Wilmeth

Arizona bill permits small modular reactors to be zoned and co-located alongside industrial/commercial facilities to accelerate nuclear energy deployment while raising safety coordination concerns.

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Bill Summary · HB 2456

Legislative bill overview

HB 2456 permits small modular reactors (SMRs) to be co-located with other industrial or commercial facilities and establishes zoning allowances for their placement in Arizona. The bill streamlines regulatory pathways for siting SMRs alongside existing infrastructure rather than requiring dedicated reactor-only facilities.

Why is this important

Small modular reactors are emerging nuclear technology that proponents argue can provide reliable, carbon-free energy to industrial operations and data centers. Allowing co-location could accelerate SMR deployment in Arizona and reduce land-use conflicts, but it also raises questions about safety oversight, emergency preparedness, and cumulative risk management at multi-use sites.

Potential points of contention

  • Safety and emergency response: Coordinating evacuation procedures and emergency protocols becomes more complex when reactors share sites with other industrial operations, employees, and activities
  • Regulatory authority: Clarification needed on which agencies (state vs. federal) retain oversight and whether Arizona's zoning authority supersedes Nuclear Regulatory Commission jurisdiction
  • Precedent and liability: Establishing co-location standards may create liability questions if incidents occur and questions about whether operators or site owners bear responsibility

Compiled from official sources — confirm details with the bill’s official record.

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