An independent expert commissioned by Greenpeace has found the two nuclear reactors currently being built in Finland and France have serious safety flaws in their design. Dr. Helmut Hirsch, Scientific Consultant for Nuclear Safety says the design of AREVA’s much heralded third-generation EPR reactor is ‘contradictory to the foundation of nuclear safety’.
A nuclear reactor’s control systems are supposed to be independent, so that a failure of one system doesn’t compromise the whole reactor. This is not the case with the EPR – its systems are interlinked. ‘In the worst case,’ says Dr Hirsch, ‘this can lead to a minor incident developing into a severe accident.’ This has led to the nuclear regulators in the UK (who are evaluating the EPR design as part of their nuclear ‘renaissance’), France and Finland to jointly express their concern with this design flaw.
This is on top of ongoing serious problems at the construction of the OL3 EPR at Olkiluoto, Finland. Last week it was found that the pipes in the reactor’s essential cooling system (the part of the reactor that prevents a meltdown) have been welded using unacceptable methods without any supervision or written records. The surface of the pipes had been welded to cover up damage which may have weakened the pipes beyond repair.
The number of defects in OL3’s construction is around 3,000. The Finnish nuclear regulator STUK has detected many that were in fact approved by AREVA’s quality control but can we be certain that STUK has found them all? In 2006 STUK admitted that they could not be sure due to the high number of problems.
What we can be certain of however is that the EPR reactor is a dangerous and failed experiment. The safety flaws highlighted by Dr Hirsch reveal that there can be no confidence in the safety of the EPR design. The massive budget and schedule overruns show that a programme of building EPRs across the planet, as AREVA plans, presents a very real threat to the fight against climate change. Neither must we forget the legacy of nuclear accidents.
EPR, like nuclear power as a whole, not only threatens our safety, but takes and wastes the vital money, time and resources that we need to expand renewable energy and energy efficiency programmes if we are serious about saving our climate. The risks are too great. EPR must be abandoned immediately.
Read Dr. Hirsch’s report here. Greenpeace’s EPR factsheet is here.
