Protesters from all over the UK are gearing up for a mass trespass at the Somerset site earmarked for the first of a new generation of nuclear power stations.
Hundreds are planning to converge at a weekend protest camp before scaling the fence round land being cleared for the controversial Hinkley C power plant.
The Stop New Nuclear Alliance expects many people to be arrested.
“The government is refusing to acknowledge that its ‘new nuclear’ strategy is dangerous and expensive so we are being forced to raise our game,” said spokeswoman Nancy Birch.
But EDF Energy which runs Hinkley B and is bidding to build the new reactor said: “We respect the right to lawful protest and understand the impact that this can have on the local community.”
The firm says it has the support of the majority of local people.
On the Saturday symbolic barrels of radioactive waste will be wheeled through the streets of nearby Bridgwater to highlight the huge stockpile of high-level nuclear waste that will be stored at Hinkley C if it gets the green light.
On Monday protesters will attempt to scale the fence around the Hinkley C site and scatter seeds in a symbolic attempt to reclaim land.
The project to build a new reactor at Oldbury in Gloucestershire suffered another blow when the Franco-Chinese syndicate expected to bid for the Horizon nuclear joint venture at Oldbury and Wylfa in Wales missed the deadline to do so, according to insiders quoted by The FT.