Rejected petition Request for a Senedd Debate on Sub‑Surface Protection for Modular Nuclear Reactor Sites

I am writing to request that the Senedd schedule a debate on the national‑security, civilian‑protection, and long‑term resilience implications of siting any future modular nuclear reactors (MNRs) in Wales.

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I ask the Senedd to consider requiring that any MNR installations in Wales be constructed within reinforced, partially or fully sub‑surface protective structures. Such an approach would increase national resilience, protect critical infrastructure, safeguard civilian populations, strengthen long‑term energy stability, and align with best‑practice strategic risk planning.

This proposal is not based on alarmism but on prudent, responsible planning. Wales has an opportunity to lead the UK in adopting a forward‑looking, civilian‑centred approach to nuclear‑energy resilience — one that protects communities, strengthens national security, and ensures that our energy infrastructure remains robust in any future scenario.

This would at least increase security for all present and future generations of Wales and the U.K.

Why was this petition rejected?

It’s about something that the Senedd or Welsh Government is not responsible for.

The Government of Wales Act 2006 establishes the extent of the Senedd’s power to make new laws and amend existing law (also known as legislative competence). Schedules 7A and 7B of the 2006 Act set out the issues which are ‘restricted’ or ‘reserved’ - i.e. areas where the UK Parliament, not the Senedd, can legislate.

Nuclear energy and National security are the responsibliity of the UK Government. As a result, it is not possible for the Senedd to take the action called for by your petition.

Further information about the powers and responsibilities of the Senedd can be found here: https://senedd.wales/how-we-work/our-role/powers/

You may wish to consider petitioning the UK Parliament about this issue instead: https://petition.parliament.uk/

We only reject petitions that don’t meet the petition standards

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Date submitted 25 June 2026
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