Showing posts with label Infochange. Show all posts
Showing posts with label Infochange. Show all posts

21 May 2011

The myth of safe and peaceful use of nuclear energy

The Japanese have been very conscious of the dangers of nuclear weapons, but there has been little support for campaigns against nuclear power. Just as Japan’s unique Peace Constitution evolved from the ruins of World War II, the Fukushima disaster could initiate a new, peaceful and environmentally harmonious society, says Yuki Tanaka  
The devastating earthquake registering 9.0 on the Richter scale that hit Japan on March 11, 2011, together with the massive tsunami, completely destroyed the picturesque northeastern coast of Japan's main island, taking tens of thousands of lives and creating hundreds of thousands of refugees.

Along this stretch of utter destruction, four nuclear power stations comprising a total of 15 reactors are placed within a distance of about 200 km. Of these, the Fukushima No 1 nuclear power station, operated by the Tokyo Electric Power Company (TEPCO), is the largest, comprising six nuclear reactors. Until now, TEPCO has been proud of the robustness of the containment vessels of these reactors. It has claimed that they were made utilising the brilliant technology originally developed to produce the main battery of the largest naval artillery ever produced, mounted on the gigantic battleship, Yamato, of the Japanese Imperial Navy, which US forces destroyed towards the end of the Asia-Pacific War. TEPCO claimed that the nuclear reactors would safely stop, then automatically cool down and tightly contain the radiation in the event of an earthquake, and that there was therefore no danger of earthquakes causing any serious nuclear accident. The vulnerability of nuclear reactors to earthquakes was already evident, however, when TEPCO's Kashiwazaki-Kariwa plant on Japan's northwest coast caused several malfunctions, including a fire in a transformer, and a small quantity of radiation leaked into the ocean and the atmosphere following a magnitude 6.8 earthquake that hit this region in July 2007. In spite of this serious accident, TEPCO still arrogantly overrated their "world best nuclear power technology".

Yet, immediately after the March 11 earthquake violently shook these reactors and the towering waves of a tsunami surged and damaged many buildings of the power station, the myth of the "safe and durable reactor", a myth propagated by TEPCO, was immediately shattered. At the time of writing (mid-March), half of the six reactors seem to be on the verge of melting down, and one of the containment buildings has caught fire due to spent fuel rods combusting. The radiation level in the vicinity of the power station is extremely high, and it is spreading as far as Tokyo and Yokohama. Thus, as every day passes, an unprecedented scale of nuclear disaster is unfolding, making it more and more difficult to arrest the multiple problems of radioactivity.

What went wrong with Japan's nuclear industry? It is often said that the Japanese are hyper-sensitive about nuclear issues because of the experience of the nuclear holocaust in August 1945. On the morning of August 6, 1945 an atomic bomb instantly killed 70,000 to 80,000 civilian residents of Hiroshima city and by the end of 1945, 140,000 residents of that city had died as a result of the bombing. Three days later, another atomic bomb killed about 40,000 civilians in Nagasaki and 70,000 had died by the end of that year. Many others have subsequently died, often after experiencing a lifetime of suffering, or are still suffering from various diseases caused by the blast, fire and radiation.

It is true that the Japanese, in particular the citizens of Hiroshima and Nagasaki, are very conscious of the danger of nuclear weapons, the most lethal weapons of mass destruction. A-bomb survivors, who know well the terror of the bomb and who are fearful of the long-lasting effects of radiation, have therefore been in the vanguard of the anti-nuclear weapons campaign. Despite this, however, many A-bomb survivors and anti-nuclear weapons activists have so far been indifferent to the nuclear energy issue. Anti-nuclear energy campaigners have long been marginalised in Japan.

For example, a small group of anti-nuclear energy activists in Hiroshima have been actively involved in the movement against the Chugoku Electric Power Company's (CEPCO) plan to build a nuclear power station near Kaminoseki, a beautiful fishing village on Japan's Inland Sea, about 80 km from Hiroshima City. However, they have had virtually no support from any A-bomb survivors' organisations. Nor have either the former or current mayors of Hiroshima, who are widely known as strong advocates for the abolishment of nuclear weapons, ever supported this local anti-nuclear power movement. Indeed they have never expressed concern about the danger of nuclear power accidents. Despite strong opposition by this group of anti-nuclear energy activists in solidarity with the fishermen of Kaminoseki, CEPCO started construction work early this year. (CEPCO temporarily stopped construction work on this site on the day of the earthquake, perhaps indicative of the very great difficulty the nuclear power industry and the government will have in resuming work on nuclear plants following the disasters.)

There are many reasons for this peculiar dichotomy in the anti-nuclear movement in Japan. One reason is that nuclear science was strongly promoted in post-war Japan, in particular after the new American policy of "peaceful use of nuclear energy" was initiated under President Eisenhower in 1953. This was mainly due to Japanese self-reflection about having neglected scientific research during the war. Contemporary Japanese politicians and scientists in particular strongly believed that their nation was defeated in WW2 by American technological science, exemplified by nuclear physics.

This attitude, together with a deep anxiety about the lack of natural energy resources in a nation that relies on imports for 100% of its oil and is the world's largest importer of coal, overtly encouraged Japanese adoption of nuclear energy. Particularly from the late-1960s the Japanese government tried to secure the approval of local communities in remote areas for the construction of nuclear power plants in their regions. The government allocated huge sums to build public facilities such as libraries, hospitals, recreation centres, gymnasiums and swimming pools in areas where local councils accepted a nuclear power station. Power companies paid large sums of money to landowners and fishermen to force them to give up their properties and fishing rights. Political corruption soon became part and parcel of the development of this industry. At the same time, the government and power companies promoted the myth that nuclear power is clean and safe, thereby marginalising the anti-nuclear energy movement.

Although for a short period following the Chernobyl accident in 1986, the anti-nuclear power movement in Japan gained nation-wide support, this quickly subsided following campaigns by the government and the power companies. Despite many accidents since, the seriousness of these incidents was effectively covered up. Consequently there are now 17 nuclear power stations around the earthquake-prone Japanese Archipelago, comprising 54 nuclear reactors which provide 30% of Japan's electricity.

The anti-nuclear movement has been warning of the dangers of a devastating nuclear accident for years, but this has always been met with dismissive assurances of the safety of the reactors. The Fukushima accident has brought to fruition all the fears and predictions previously expressed. In the same way that the atomic bomb indiscriminately killed tens of thousands of civilians, a nuclear reactor accident could be responsible for indiscriminate suffering and death as a consequence of radiation pollution. 

Australia and Canada are the two largest uranium suppliers for Japan. Thirty-three percent of Japan's uranium import comes from Australia and 27% from Canada. Australia is faced with the decision of whether to continue exporting uranium even as certain politicians insist that we cannot afford to risk introduction of nuclear power. Surely it is hypocritical to avoid the dangers at home, while benefitting from the export  to other nations? In the same vein, these politicians advocate the need to abolish nuclear weapons, but refuse to ban the mining of uranium.

Japan is not the sole nation responsible for the current nuclear disaster. From the manufacture of the reactors by GE to the provision of uranium by Canada, Australia and others, many nations are implicated. We all should learn from this tragic accident that human beings cannot co-exist with nuclear power, whether it is in the form of weapons or electricity.  The risks and the costs, in dollar terms and in terms of the destruction of human beings and the environment, are excessive.

This catastrophic event could potentially be the catalyst needed to drastically reform Japan's existing socio-economic structure and way of living. As a positive outcome, it could provide the wake-up call and opportunity to redirect the nation on a new course that emphasises green energy development. In the same way that Japan's unique Peace Constitution evolved from the ruins of World War II, this calamity could be used to initiate a hitherto impossible, totally new, peaceful and environmentally harmonious society. Such an optimistic outcome is dependent on the determination and actions of the Japanese people, supported by the whole-hearted assistance of those outside Japan.

(Yuki Tanaka is Research Professor, Hiroshima Peace Institute, Hiroshima City University) 

Nuclear disasters worldwide: 1952-2011

Twenty-five years after Chernobyl and following the recent Fukushima disaster in Japan, a listing of nuclear accidents that have occurred around the world
Citizens of Kiev, Ukraine, observe the anniversary of the deadly explosion at the Chernobyl nuclear power plant
December 12, 1952
Partial meltdown of a reactor’s uranium core occurred at the Chalk River plant near Ottawa, Canada, due to the removal of four control rods. Millions of gallons of radioactive water were poured into the reactor. There were no injuries.

October 10, 1957
Fire destroyed the core of a plutonium-producing reactor at Britain’s Windscale nuclear complex (renamed Sellafield) sending clouds of radioactive substances into the atmosphere. The graphite core of the reactor caught fire, releasing substantial amounts of radioactive contamination into the surrounding area. The incident could have caused dozens of cancer deaths in the vicinity of Liverpool.

September 29, 1957
During the winter of 1957, near the town of Kyshtym, Russia, a cooling system in one of the tanks of a nuclear plant containing about 70–80 tonnes of liquid radioactive waste failed and was not repaired. The temperature in it started to rise, resulting in evaporation and a chemical explosion of the dried waste consisting mainly of ammonium nitrate and acetates. The explosion threw the 160-tonne heavy concrete lid into the air. There were no immediate casualties. 

January 3, 1961
The SL1 or State Low Power Reactor Number 1 was a United States Army experimental reactor which underwent a steam explosion and meltdown on January 3, 1961, killing its three operators. The direct cause was improper withdrawal of the central control rod, responsible for absorbing neutrons in the poorly designed reactor core. The event is the only known fatal reactor accident in the United States. 

July 4, 1961
The captain and seven crew members died when radiation spread through the Soviet Union’s first nuclear-powered submarine. A pipe in the control system of one of the two reactors had ruptured.

October 5, 1966
The core of an experimental reactor near Detroit, Michigan, melted partially when a sodium cooling system failed. A zirconium plate at the bottom of a reactor vessel came loose during a test for full power. The plate blocked the flow of liquid sodium coolant, causing two fuel sub-assemblies to begin to melt. When radiation monitors sounded, operators shut down the reactor manually. 

January 21, 1969
A coolant malfunction at an experimental underground reactor at Lucens Vad, Switzerland, led to partial core meltdown and massive radioactive contamination of the cavern, which was then sealed. The accident was caused by water condensation forming on some of the magnesium alloy fuel element components during shutdown, thereby corroding them. No workers were exposed to the radiation at the plant.

December 7, 1975
At the Lubmin nuclear power complex on the Baltic coast, in the former East Germany, a short-circuit caused by an electrician error started a fire. The fire in the main trough destroyed the electric supply and the control lines of five main coolant pumps. The fire was brought under control quickly. This incident was made known to the public only in 1989.


March 28, 1979
The Three Mile Island accident occurred near Harrisburg, Pennsylvania. It is considered to be America’s worst nuclear accident. Partial meltdown of one of the reactors (unit 2 -- a pressurised water reactor) forced the evacuation of residents after radioactive gas escaped into the atmosphere. It resulted in the release of 481 PBq (13 million curies) of radioactive gas, and less than 740 GBq (20 curies) of iodine-131. The mechanical failures were compounded by the initial failure of plant operators to recognise the situation as a loss-of-coolant accident due to inadequate training and human factors.

February 11, 1981
Eight workers were contaminated and more than 100,000 gallons of radioactive coolant fluid leaked at the Tennessee Valley Authority’s Sequoyah-1 plant in Tennessee, when an under-trained technician opened a valve at the plant. 

April 25, 1981
Officials said around 45 workers were exposed to radioactivity during repairs to a plant at Tsuruga, Japan.

January 25, 1982 
A steam generator pipe burst at the Ginna nuclear generating station, causing 15,000 gallons of radioactive coolant to leak and radioactive steam to be released into the atmosphere.

April 26, 1986
The world’s worst nuclear accident occurred after an explosion and fire at the Chernobyl nuclear power plant in Ukraine, causing the immediate death of 31 people. Hundreds of thousands of residents were moved from the area (between 1986 and 2000) and a similar number are believed to have suffered from the effects of radiation exposure.

March 24, 1992
At the Sosnovy Bor station near St Petersburg, Russia, radioactive iodine escaped into the atmosphere through a ruptured fuel channel. Loss of pressure in a reactor channel was the source of the accident.

November 1992
In Forbach, France, three workers without protective clothing were contaminated after entering an electron accelerator irradiator used to treat granulated polytetrafluoroethylene (Teflon). Executives were jailed in 1993 for failing to take proper safety measures. 

December 8, 1995
Around 700 kg of molten sodium leaked from the secondary cooling circuit of the Monju reactor, causing a fire. Although the accident itself did not result in a radiation leak, the sodium spill came very close to detonating Monju, a catastrophe which would have spilled plutonium into the environment. 

March 1997
Thirty-five workers were contaminated with minor radiation after a fire and explosion at Japan’s state-run Power Reactor and Nuclear Fuel Development Corporation reprocessing plant at Tokaimura, Japan.

September 30, 1999
Another accident at the uranium processing plant at the Tokaimura, Japan, plant exposed 55 workers to radiation. More than 300,000 people living near the plant were ordered to stay indoors. Workers had been mixing uranium with nitric acid to make nuclear fuel, but had used too much uranium which set off the accidental uncontrolled reaction.

February 16, 2002
Severe corrosion of a control rod forced the outage of the Davis-Besse reactor at Oak Harbour, Ohio, United States. Inspections found that an acid leak had nearly eaten through the reactor’s six-inch-thick steel cap. In September 2011, the Nuclear Regulatory Commission allowed it to resume operations.

August 9, 2004
An accident occurred in a building housing turbines for the Mihama 3 reactor in Japan. Hot water and steam leaked from a broken pipe killing four workers, and it resulted in seven others being injured. The accident was referred to as Japan’s worst nuclear power accident before the current crisis at the Fukushima nuclear power plant.

March 11, 2011
A cooling failure in four reactors following an earthquake, tsunami, multiple fires, and hydrogen explosions at the Fukushima nuclear power plant. People living within 10 km of the plant were evacuated from the site. Worldwide measurements of iodine-131 and caesium-137 indicate that the releases from Fukushima are of the same order of magnitude as the releases of those isotopes from the Chernobyl disaster in 1986. The International Atomic Energy Agency (IAEA) announced on March 27 that workers had been exposed to radiation at their ankles when standing in water in unit 3 of the plant. Tokyo Electric Power Company (TEPCO) confirmed the death of two workers due to the disaster.

Source:
http://technorati.com/lifestyle/article/why-the-japanese-nuclear-disaster-scares/
http://issuesoncall.blogspot.com/2011/03/about-radiation-from-nuclear-power.html
http://articles.latimes.com/1986-04-30/news/mn-2741_1_radioactive-water
http://globalvoicesonline.org/2008/01/25/japan-videotape-from-1995-monju-reactor-leak/
http://www.tepco.co.jp/en/index-e.html
http://www.businessweek.com/ap/financialnews/D9M0VHR82.htm
http://archive.greenpeace.org/comms/nukes/chernob/rep02.html
http://en.wikipedia.org/wiki/Nuclear_and_radiation_accidents
http://www.factophile.com/show.content?action=view&pageid=124
http://atomicarchive.com/
http://en.wikipedia.org/wiki/Three_Mile_Island_accident
http://www.joewein.de/jpnmon06.htm
http://www.ohiocitizen.org/campaigns/electric/nucfront.html
http://www.nirs.org/press/03-13-2002/1
http://en.wikipedia.org/wiki/Mihama_Nuclear_Power_Plant
http://en.wikipedia.org/wiki/List_of_civilian_nuclear_accidents#1980s
http://en.wikipedia.org/wiki/Monju_Nuclear_Power_Plant#Monju_sodium_leak_and_fire
http://news.xinhuanet.com/english2010/world/2011-03/12/c_13775056.htm
http://www.thejackz.com/nuclear.html
Compiled by Aaron Pereira
Courtesy: Infochange News & Features, May 2011