Principal Speaker Keith Taylor commented: "The reactor core cracks revealed today serve to remind us that, aside from the ongoing risk of accidents and terrorists attacks, nuclear power is an inherently unsafe technology.
"Even when things are going to plan, there are still massive fears over the safety of the UK's ageing atomic power stations.
"Nuclear power is dirty, dangerous and expensive - and doesn't provide a solution to either climate change or the end of oil. It produces a deadly legacy of nuclear waste which we still don't know how to deal with - and creates a devastating target for terrorists.
"At this crucial time, with the government energy review about to report, news such as this should force Blair to question his recent about turn on nuclear power.
"Other European countries currently generate significantly more electricity from renewable sources than the UK - Denmark 20 per cent, Sweden 47 per cent, and Spain 16.2 per cent. Why not the UK?
"The nuclear dream is over. But the clean energy future is just beginning. Mr Blair must recognise the folly of following the nuclear power route, and take the opportunity to enter the history books as the PM that turned away from nuclear and secured a sustainable and renewable energy future for the UK using solar, wind wave and biomass."