Decision

Nuclear justification approved for Rolls-Royce Small Modular Reactor

Secretary of State approves nuclear justification for Rolls-Royce Small Modular Reactor (SMR) designed by Rolls-Royce SMR Limited.

• From: Department for Environment, Food & Rural Affairs
• Published: 13 March 2026

Documents

Justification decision on the Rolls-Royce Small Modular Reactor designed by Rolls-Royce SMR Limited

PDF, 473 KB, 39 pages

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Details

The Secretary of State, Emma Reynolds’ decision as Justifying Authority, that the Rolls-Royce Small Modular Reactor (SMR) designed by Rolls-Royce SMR Limited should be justified under The Justification of Practices Involving Ionising Radiation Regulations 2004.

The decision takes into account responses to the Consultation on the Application for the ‘Rolls-Royce SMR’ designed by Rolls-Royce SMR Limited, open from 6 October to 1 December 2025, and the views of statutory consultees. 

Secondary legislation giving effect to the justification decision will need to be approved by a resolution of each House of Parliament.

A Welsh language version of the decision document will be published soon.

Published 13 March 2026