Amid the tragedy of the Japanese earthquake and tsunami, another tragic drama continues to unfold.
Updated at end - it is worseIn a nut shell, the phrase “it could have been worse” seems to be the defense adopted (in the press at least) by those still willing to defend the almost certainly critically tarnished PR sheen of nuclear power. Yes, it is remarkable that the six reactors located on the coastline facing a geologically active tectonic plate survived the initial earthquake and impact – and it was probably lucky that three of them were temporarily shut down prior to the event for maintenance. But this does not “prove” the inherent safety of the technology. It does prove that concrete of sufficient thickness and mass does not get washed away by a 5-7 meter tsunami.
The Sydney Morning Herald has a useful graphic.
The ever ready Ziggy (Neutron) Switkowski hit the press early:
Threat from meltdown only minor: Ziggy Switkowski (13th)
The impact of any meltdown in Japanese nuclear reactors damaged by the recent earthquake will be small compared to the devastation caused by the quake itself and the subsequent tsunami, Australia's best-known nuclear power expert says.
Talk about shifting the Overton Window…
"The contribution, if any, to this [disaster] from the nuclear fleet, I expect even under worst case scenarios is going to be small," he told Fairfax Radio Network today.
"That's not to deny that people are always concerned and justly concerned about the integrity of the nuclear reactor network," Dr Switkowski said.
"The Japanese reactors are probably as good as you can find around the world, but this magnitude 9 earthquake may well have tested the limits of their design."
"It could then over time just settle in and the reactor would be irreversibly damaged, or if there was an explosion - and it would be a chemical explosion, nuclear reactors can't have atomic explosions - then there would be both physical damage and the release of radiation."
The risk of an uncontrolled loss of containment of the core, releasing large amounts of radiation, was very, very small, and the radiation would probably not spread very far, he said.
Noting that people had been evacuated from a 20-kilometre exclusion zone around the reactors, he said, "I would think that the possibility that there would be significant build-up of radiation outside the zone would still remain low."
And the next day…
Japan nuclear health risks low, won't blow abroad, experts say (14th)
Health risks from Japan's quake-hit nuclear power reactors seem fairly low and winds are likely to carry any contamination out to the Pacific without threatening other nations, experts say.
"But there are obviously serious concerns about ensuring that the core of one of these reactors where the cooling isn't working remains under control and does not melt and does not create radiation leaks."
Describing this as the worst case scenario, he said the melting would effectively destroy the core of the reactor.
"It could then over time just settle in and the reactor would be irreversibly damaged, or if there was an explosion - and it would be a chemical explosion, nuclear reactors can't have atomic explosions - then there would be both physical damage and the release of radiation."
And the next day…
Ziggy predicts nuclear Australia (15th)
The immediate past chairman of the Australian Nuclear Science and Technology Organisation said he anticipated Australians would be apprehensive about adopting nuclear power after the unfolding crisis in Japan but he believed Australia would eventually use it as an energy source.
"I remain convinced that in our future we will see nuclear power," he said on ABC-TV last night.
"We do need clean energy, we are an energy-hungry nation."
The lack of thought in that throw away line beggars belief.
Dr Switkowski, who is a nuclear physicist, said what was happening in Japan was unlikely to occur in Australia.
"We are not geologically active, we aren't in the path of typhoons and hurricanes and tsunamis," he said.
But environmentalists said the problems in Japan proved nuclear power was never safe.
"Japan's nuclear plants were built with the latest technology, specifically to withstand natural disasters, yet we still face potential meltdown," Greenpeace spokesman Steve Campbell said.
I'm sure this face time with the press is all out of a dear love of his subject, but we already have other opinions;