Showing posts with label Light Water Reactors. Show all posts
Showing posts with label Light Water Reactors. Show all posts

24 November 2011

Martin Durkin - We Need You! Tell the Story of Alvin Weinberg and LFTRs


Martin Durkin



http://www.martindurkin.com/webform/contact

This is my email to Martin Durkin on 11 November 2011. So far, it has gone unanswered. 

Dear Mr. Durkin,

I am a Liquid Fluoride Thorium Reactor (LFTR) advocate and host the only UK Blog on the topic "LFTRs to Power the Planet":  http://lftrsuk.blogspot.com/

The history of this uniquely safe and affordable nuclear power-generating reactor is a Greek Tragedy because, had it been deployed 40 years ago when the technology was 90% proven on an operating reactor, the world would not be in the polluted mess it is now. Since LFTRs can be used for the manufacture of liquid fuels, Peak Oil would still be in the distant future as hydrocarbons would only have been used for the stuff we need and not just burned for energy. 

Instead, it was side-lined in favour of the Light Water Reactor (LWR) which produced plutonium for bombs; Three Mile Island was a Pressurised Water Reactor (PWR) plant, which is a one version of a LWR and Fukushima had the other version, a Boiling Water Reactor (BWR).

The story which needs to be told is that of Alvin Weinberg, under who's Directorship, at the Oak Ridge National Laboratory (ORNL) the Molten Salt Reactor Experiment (MSRE) was conducted; this operating reactor produced power from 1965 to 1969 and the design is the basis for what we now call the LFTR.

After working on the Manhattan Project, Weinberg joined forces with Admiral Rickover in designing a nuclear propulsion reactor for the Nautilus Class Submarines and it is he who invented and patented the LWR. However, when LWRs were being considered for civil power generation, Weinberg predicted the loss-of-coolant/meltdown accidents (since witnessed at Three Mile Island and Fukushima) and railed against their use. Instead, Weinberg championed the intrinsically safe Molten Salt Reactor (MSR - now LFTR) and for his troubles, in 1972 he was asked to resign from his pursuit of further MSR development at ORNL, by a Congressman in the LWR camp.

Worldwide deployment of low-cost, modular LFTRs, capable of being transported on flat-bed vehicles and container-ships are affordable by the developing world. LFTRs can supply all of the energy requirements of every individual on the planet (at developed world standards), for hundreds of thousands of years, from the near inexhaustible resources of thorium fuel. Thorium is so energy dense that the ground under your feet can supply energy more cheaply than any other fuel - Weinberg described it as "mining the rocks..."

There is no other form of energy supply that is less environmentally destructive and capable of worldwide deployment. We have to dream that the raising of the standard of living of the most deprived and deserving will solve many of the worst problems facing humankind.

This 40 year stasis of a solution to the world's energy woes has brought us to turbulent times of great inequality; if this is not the saddest 'Accident of History', I don't know what is.

Would you consider telling the story, in your much-admired fashion?

Regards,

Colin Megson.

07 September 2011

Alvin M. Weinberg's Legacy.

What does humankind already owe Alvin Weinberg - Well, he invented Light Water Reactors, so how many millions or billions of tonnes of greenhouse gas emissions has that saved? How many millions of premature deaths from fossil fuel burning pollution has that prevented?

If LFTR are widely deployed, Weinberg's obsession becomes reality. In his autobiography Weinberg confessed:
"I became obsessed with the idea that humankind's whole future depended on the breeder. For Society generally to achieve and maintain a standard of living of today's developed countries depends on the availability of relatively cheap, inexhaustible sources of energy."

Of course, he was talking about breeding fissile uranium from thorium, with thorium's abundance capable of supplying all of our energy needs for hundreds of thousands of years (to all intents and purposes - inexhaustible)

Let's hope and let's dream it happens and then, in terms of the debt humanity owes to an individual, Weinberg will be at the pinnacle.

21 March 2011

Safety of Light Water Reactors (LWRs)

Alvin Weinberg invented and held the patents on Light Water Reactors (LWRs). The UK's new-build nuclear programme is selecting from Areva's EPR or Westinghouse's AP1000, both of which are a version of an LWR known as Pressurised Water Reactors (PWRs); these are also the most prevalent civil nuclear reactor currently in use. The Fukushima plants are Boiling Water Reactors (BWRs), which are another version of LWRs.

The reactor vessels of LWRs contain pressurised water (wanting to turn to steam, if depressurised) or steam, at about 160 times atmospheric pressure. This is a high energy 'driver' capable of expelling radioactive substances into the atmosphere. Accidental and planned depressurisation played parts in both Three Mile Island and Fukushima accidents. The degree of atrophying of the nuclear industry, resulting from TMI, may well be amplified, in coming years, because of Fukushima.

The Enrico Fermi Award, presented to scientists of international standing for their contribution to energy - 1980, Alvin Weinberg.

This is a man who should be listened to; his opinions are important.

Weinberg railed against the use of LWRs for civil use, because of his awareness of their safety-fallibility. As Director of Research at Oak Ridge National Laboratory (ORNL), conducting experiments and operations of Molten Salt Reactors (MSRs),he argued vehemently for the use of one such MSR, the Liquid Fluoride Thorium Reactor (LFTR). LFTRs operate at atmospheric pressure and have no pressure 'driver', or any other form of driver (such as highly reactive chemicals), to expel radioactive substances into the environment. Weinberg went head-to-head with the political and military paymasters of the nuclear programme, in the criticism of LWRs and the promotion of the safety superiority of LFTRs, and for this, he was asked to leave the nuclear industry. His loss to ORNL, meant that his work had a short-lived legacy, withering on the vine until funds were withdrawn in the early 70s.

Until his dying day, Weinberg thought that the Earth's inexhaustible thorium resources would be the future of energy supply for all of humankind.

In his autobiogra­phy Weinberg confessed:
“I became obsessed with the idea that humankind’­s whole future depended on the breeder. For Society generally to achieve and maintain a standard of living of today’s developed countries depends on the availabili­ty of relatively cheap, inexhausti­ble sources of energy.”

In saying ‘breeder’, he was talking about the transmutat­ion of thorium232 to fissile Uranium233 in a LFTR.


Sunday 30 March 2011, reported in The Telegraph,  Chris Huhne said: "Globally, this undoubtedly casts a shadow over the renaissance of the nuclear industry. That is blindingly obvious."

I intend to vociferously lobby Chris Huhne and all members the Select Committee on Energy and Climate Change to consider, over and above the views of the Committee's expert witnesses, the views of the inventor of LWRs in respect of their safety and his desire to invest civil society with the ultimate in electricity and heat generation - the LFTR.