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    Hinkley Point C second reactor pressure vessel: construction and fit-out notes for engineers

    January 12, 2026|

    Reviewed by Tom Sullivan

    Hinkley Point C second reactor pressure vessel: construction and fit-out notes for engineers

    First reported on New Civil Engineer

    30 Second Briefing

    Delivery of the second reactor pressure vessel to Hinkley Point C marks a key milestone for Unit 2 of the twin EPR nuclear plant under construction on the Somerset coast. The forged steel vessel, weighing several hundred tonnes and designed to contain the reactor core and primary coolant circuit, was transported to site as a single component using specialist heavy-lift logistics. Its arrival allows civil and mechanical contractors to advance reactor building fit-out, including internal support structures, penetrations and integration with primary circuit pipework.

    Technical Brief

    • For similar twin-unit nuclear builds, staggered vessel deliveries reduce peak labour demand and cranage conflicts.

    Our Take

    Within the 405 Infrastructure stories in our database, UK nuclear work like Hinkley Point C in Somerset is still relatively rare compared with transport and water schemes, underscoring how unusual it is for civil contractors to gain current, large-scale nuclear delivery experience in the country.

    Reaching the second reactor pressure vessel milestone at Hinkley Point C effectively locks in the twin-unit configuration, which tends to drive long-term demand for highly specialised heavy-lift, welding and QA/QC supply chains that other UK energy projects can subsequently tap into.

    For Somerset specifically, Hinkley Point C stands out in our infrastructure coverage as one of the few assets likely to anchor grid stability and baseload capacity, which can influence how future regional renewables and transmission upgrades are phased and justified in planning processes.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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