A DEFECTIVE pipe caused an acid leak at Bradwell nuclear power station sparking an investigation at the plant. In late September a “small quantity” of acid escaped from a pipe with all of the fluid contained at the site, on the banks of the River Blackwater. A Magnox spokesman said: “During ongoing decommissioning work of a new water treatment plant, a defect was located within a pipe that allowed a small quantity of acid to escape into a further containment hold. “This pipe is not used to discharge liquid from the site. All of the material has been contained on the site, there has been no release of radioactivity and no impact on the environment.