2-854-143 - Historic England Archive/Heritage Images

Looking south-east towards the reactor dome during the construction of Sizewell 'B' Nuclear Power Station, showing work commencing on the formwork for the secondary containment layer. The primary containment building for the nuclear reactor was 'topped out' on 9th July 1992. Work then began on the construction of the secondary containment, leaving an air gap of 3m between the two concrete layers. The secondary containment was 'topped out' in October 1993, in a ceremony marking the completion of the structure.