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Conflict Between Nuclear-Powered Nations: Chernobyl Is Now a War Zone

Chernobyl

Chernobyl nuclear power plant a few weeks after the disaster. Chernobyl, Ukraine, USSR, May 1986. (Photo: Igor Kostin/Laski Diffusion/Getty Images)

Conflict Between Nuclear-Powered Nations: Chernobyl Is Now a War Zone

The next Chernobyl scale nuclear disaster could happen in Chernobyl as the Ukraine conflict intensifies.

The invasion of Ukraine by Russia poses several nuclear threats, including the possibility of deliberate or inadvertent military strikes or cyber-strikes on nuclear facilities.

There is also the obvious difficulty of safely operating nuclear reactors in a time of war, including the impossibility of carrying out safeguards inspections. Last but not least, there remains the possibility that the conflict will escalate into nuclear warfare.

We are about to learn what happens when nuclear-powered nations go to war, putting nuclear power plants at risk of deliberate or accidental military strikes and thus risking a Chernobyl scale catastrophe.

Retaliation

It seems highly unlikely that either nation—or any sub-national groups—would deliberately target nuclear reactors or spent fuel stores in the current conflict. But assuming there is a ‘gentleman’s agreement’ not to target nuclear power plants, how long would that agreement hold in a war that dragged on for years?

Either nation might choose to shut down its reactors in order to minimise risks. That would be a manageable and wise decision for a country with limited reliance on nuclear power—but it would be impractical for countries with a heavy reliance.

In any case, the radioactive reactor cores—whether kept in situ or removed from the reactors—would remain vulnerable, as would nuclear waste stores. Spent fuel cooling ponds and dry stores often contain more radioactivity than the reactors themselves, but without the multiple engineered layers of containment that reactors typically have.

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Nuclear Fallacies: the Problems With James Hansen’s Promotion of Generation IV Reactors

Nuclear Fallacies: the Problems With James Hansen’s Promotion of Generation IV Reactors

Photo by Lennart Tange | CC BY 2.0

Dr James Hansen is rightly admired for his scientific and political work drawing attention to climate change. His advocacy of nuclear power ‒ and in particular novel Generation IV nuclear concepts ‒ deserves serious scrutiny.

In a nutshell, Dr Hansen (among others) claims that some Generation IV reactors are a triple threat: they can convert weapons-usable (fissile) material and long-lived nuclear waste into low-carbon electricity. Let’s take the weapons and waste issues in turn.

The risks

Dr Hansen says Generation IV reactors can be made “more resistant to weapons proliferation than today’s reactors” and he claims that “modern nuclear technology can reduce proliferation risks”.

But are new reactors being made more resistant to weapons proliferation and are they reducing proliferation risks? In a word: No.

Fast neutron reactors have been used for weapons production in the past (e.g. by France) and will likely be used for weapons production in future (e.g. by India).

India plans to produce weapons-grade plutonium in fast breeder reactors for use as driver fuel in thorium reactors. Compared to conventional uranium reactors, India’s plan is far worse on both proliferation and security grounds. To make matters worse, India refuses to place its fast breeder / thorium program under IAEA safeguards.

Dr Hansen claims that thorium-based fuel cycles are “inherently proliferation-resistant”. But in fact, thorium has been used to produce fissile material (uranium-233) for nuclear weapons tests. Again, India’s plans provide a striking real-world refutation of Hansen’s claims.

Dr Hansen claims that integral fast reactors (IFR) ‒ a non-existent variant of fast neutron reactors ‒ “could be inherently free from the risk of proliferation”. Unfortunately, that isn’t true. Dr George Stanford, who worked on an IFR R&D program in the US, notes that proliferators “could do [with IFRs] what they could do with any other reactor − operate it on a special cycle to produce good quality weapons material.”

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Pro-Nuclear Environmentalists and the Chernobyl Death Toll

Pro-Nuclear Environmentalists and the Chernobyl Death Toll

With few if any exceptions, self-styled pro-nuclear environmentalists peddle misinformation regarding the Chernobyl death toll.

Before considering their misinformation, a brief summary of credible positions and scientific studies regarding the Chernobyl cancer death toll (for detail see here).

Epidemiological public health studies are of course important but they’re not much use in estimating the overall Chernobyl death toll. The effects of Chernobyl, however large or small, are largely lost in the statistical noise of widespread cancer incidence and mortality (see here for the most recent scientific review of the epidemiological studies).

Estimates of collective radiation exposure are available ‒ for example the International Atomic Energy Agency (IAEA) estimates a total collective dose of 600,000 person-Sieverts over 50 years from Chernobyl fallout. And the collective radiation dose can be used to estimate the death toll using the Linear No Threshold (LNT) modelwhich holds that the risks are proportional to dose. LNT enjoys heavy-hitting scientific support ‒ for example the 2006 report of the U.S. National Academy of Sciences’ Committee on the Biological Effects of Ionising Radiation states that “the risk of cancer proceeds in a linear fashion at lower doses without a threshold and … the smallest dose has the potential to cause a small increase in risk to humans.” Likewise, a report in the Proceedings of the National Academy of Sciences states: “Given that it is supported by experimentally grounded, quantifiable, biophysical arguments, a linear extrapolation of cancer risks from intermediate to very low doses currently appears to be the most appropriate methodology.”

If we use the IAEA’s collective radiation dose estimate, and a risk estimate derived from LNT (0.1 cancer deaths per person-Sievert), we get an estimate of 60,000 cancer deaths.

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