Sizewell B nuclear power station

KEY FACTS

LOCATION: Suffolk
CONTRACTOR: VINCI Construction UK Limited
CLIENT: EDF Energy
CONSULTANT: SRM
VALUE: £6m
SECTORS: Energy
SERVICES: Construction and civil engineering

The Sizewell B Dry Fuel Storage Building is the first British dry fuel store, comprising a seismically qualified reinforced concrete foundation slab cast at ground level.

Sizewell B nuclear power station
Sizewell B nuclear power station 2

The slab is approximately 114m long by 60m wide and is covered by a structural steel superstructure. The building provides storage space for 143 HI-STORM casks directly supported by the slab with a central aisle to allow a lifting transporter to freely access each row of casks.

Kilnbridge’s scope included all civils and reinforced concrete works including an engineered sub-base fill and the construction of approximately 5,000m³ of concrete raft.

The raft is designed and constructed with reference to the ACI codes for nuclear safety-related concrete structures, with the ability to withstand seismic loads, elevated temperatures and heavy plant loads and with 100 years’ design life. With such onerous specification requirements, the works required strict quality control to ensure full compliance with nuclear regulations and design requirements as well as EDF and Sizewell B health, safety and environmental rules and regulations.