A participant demonstrates a hand-made prop of a radioactive detector during a S.T.A.L.K.E.R. convention in Moscow, Russia, April 2, 2016. A game known as S.T.A.L.K.E.R., named after a popular computer shooter, is fast winning the minds of intellectuals across the former Soviet Union who take on roles of mutants, zombies and warriors on unfinished construction sites. As the 30th anniversary of the nuclear disaster in Chernobyl is marked on April 26, enacting a post-apocalyptic world is a philosophy that warns of the perils of uncontrolled use of nuclear power, the game's enthusiasts claim. REUTERS/Maxim Shemetov SEARCH "S.T.A.L.K.E.R MAX" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES

An employee measures the radiation level at a plant for processing liquid radioactive waste at the Chernobyl nuclear power plant in Ukraine March 23, 2016. REUTERS/Gleb Garanich

An employee measures the radiation level at a plant for processing liquid radioactive waste at the Chernobyl nuclear power plant in Ukraine March 23, 2016. REUTERS/Gleb Garanich

A member of a counter-radiation team uses a Geiger counter to search for missing radioactive material in Basra, Iraq, February 21, 2016. Radioactive material that went missing in Iraq has been found dumped near a petrol station in the southern town of Zubair, officials said on Sunday, ending speculation it could be acquired by Islamic State and used as a weapon. The officials told Reuters the material, stored in a protective case the size of a laptop computer, was undamaged and there were no concerns about radiation. REUTERS/Essam Al-Sudani

A member of a counter-radiation team uses a Geiger counter to search for missing radioactive material in Basra, Iraq, February 21, 2016. Radioactive material that went missing in Iraq has been found dumped near a petrol station in the southern town of Zubair, officials said on Sunday, ending speculation it could be acquired by Islamic State and used as a weapon. The officials told Reuters the material, stored in a protective case the size of a laptop computer, was undamaged and there were no concerns about radiation. REUTERS/Essam Al-Sudani

A member of a counter-radiation team uses a Geiger counter to search for missing radioactive material in Basra, Iraq, February 21, 2016. Radioactive material that went missing in Iraq has been found dumped near a petrol station in the southern town of Zubair, officials said on Sunday, ending speculation it could be acquired by Islamic State and used as a weapon. The officials told Reuters the material, stored in a protective case the size of a laptop computer, was undamaged and there were no concerns about radiation. REUTERS/Essam Al-Sudani

A member of a counter-radiation team uses a Geiger counter to search for missing radioactive material in Basra, Iraq, February 21, 2016. Radioactive material that went missing in Iraq has been found dumped near a petrol station in the southern town of Zubair, officials said on Sunday, ending speculation it could be acquired by Islamic State and used as a weapon. The officials told Reuters the material, stored in a protective case the size of a laptop computer, was undamaged and there were no concerns about radiation. REUTERS/Essam Al-Sudani

A member of a counter-radiation team uses a Geiger counter to search for missing radioactive material in Basra, Iraq, February 21, 2016. Radioactive material that went missing in Iraq has been found dumped near a petrol station in the southern town of Zubair, officials said on Sunday, ending speculation it could be acquired by Islamic State and used as a weapon. The officials told Reuters the material, stored in a protective case the size of a laptop computer, was undamaged and there were no concerns about radiation. REUTERS/Essam Al-Sudani

A member of a counter-radiation team uses a Geiger counter to search for missing radioactive material in Basra, Iraq, February 21, 2016. Radioactive material that went missing in Iraq has been found dumped near a petrol station in the southern town of Zubair, officials said on Sunday, ending speculation it could be acquired by Islamic State and used as a weapon. The officials told Reuters the material, stored in a protective case the size of a laptop computer, was undamaged and there were no concerns about radiation. REUTERS/Essam Al-Sudani TPX IMAGES OF THE DAY

79-year-old Shouhei Nomura checks radiation levels close to the protesters' campsite near Kyushu Electric Power's Sendai nuclear power station in Satsumasendai, Kagoshima prefecture, Japan, August 8, 2015. Japan is due to switch on a nuclear reactor for the first time in nearly two years as Prime Minister Shinzo Abe seeks to reassure a nervous public that tougher standards mean the sector is now safe after the Fukushima disaster in 2011. The head of Japan's atomic watchdog has said that the new safety regime meant a repeat of the Fukushima disaster would not happen, but protesters outside the Sendai plant are not convinced. REUTERS/Issei KatoPICTURE 6 OF 30 FOR WIDER IMAGE STORY "PROTESTING JAPAN'S NUCLEAR RESTART".SEARCH "KATO SENDAI" FOR ALL PICTURES.

A girl runs past a geiger counter, measuring a radiation level of 0.122 microsievert per hour, upon her arrival at the Emporium kindergarten in Koriyama, west of the tsunami-crippled Fukushima Daiichi nuclear power plant, Fukushima prefecture February 28, 2014. March 11 marks the third anniversary of the earthquake and tsunami that devastated Japan's Fukushima Daiichi nuclear power plant. In Koriyama, a short drive from the crippled Fukushima nuclear plant, the city recommended shortly after the disaster that children up to two years old not spend more than 15 minutes outside each day. Those aged 3 to 5 should limit their outdoor time to 30 minutes or less. The limits were lifted last year, but many kindergartens and nursery schools continue to obey them even now in line with the wishes of worried parents. An annual survey by the Fukushima prefecture Board of Education found that children in Fukushima weighed more than the national average in virtually every age group. The cause seems to be a lack of exercise and outdoor activity. Picture taken February 28, 2014. REUTERS/Toru Hanai (JAPAN - Tags: DISASTER EDUCATION ENVIRONMENT HEALTH)

ATTENTION EDITORS: PICTURE 04 OF 22 FOR PACKAGE 'FUKUSHIMA - FIGHTING AN INVISIBLE ENEMY'. TO FIND ALL IMAGES SEARCH 'KORIYAMA HANAI'

A Buddhist monk Yokoyama Shuhu wears a Geiger counter as he leads a small funeral ceremony for a women who died as an evacuee at a cemetery in the evacuated town of Minamitsushima inside the exclusion zone in Fukushima prefecture September 21, 2013. Shuho had to leave his temple that is inside the exclusion zone and now lives in Fukushima town. He comes back for a brief visits only when asked by local residents, mostly for funerals. Asked about Olympic games in Tokyo 2020, Shuhu said "I think it's good we will have the Olympic Games. In seven years things will be cleaner around here. And fixed, I hope." REUTERS/Damir Sagolj (JAPAN - Tags: DISASTER)

A Tokyo Electric Power Co. (TEPCO) employee wearing a protective suit and mask uses a survey meter near storage tanks for radioactive water in the H4 area where radioactive water leaked from a storage tank in August, at the tsunami-crippled TEPCO's Fukushima Daiichi nuclear power plant in Fukushima prefecture November 7, 2013. Japan approved on October 30, 2013 a plan by TEPCO to extract thousands of nuclear fuel rods from the fuel pool of the No. 4 reactor of the Fukushima Daiichi plant. Containing radiation equivalent to 14,000 times the amount released in the atomic bomb attack on Hiroshima 68 years ago, more than 1,300 used fuel rod assemblies packed tightly together need to be removed from a building that is vulnerable to collapse, should another large earthquake hit the area. REUTERS/Kimimasa Mayama/Pool (JAPAN - Tags: DISASTER ENERGY)

A Buddhist monk wears a Geiger counter as he leads a small funeral ceremony for Yotsuno Kanno, who died as an evacuee at a cemetery in the evacuated town of Minamitsushima inside the exclusion zone in Fukushima prefecture September 21, 2013. Kanno, who was evacuated after the disaster at Daiichi plant in 2011 with rest of people from Minamitsushima, died in temporary accommodation in May this year two weeks short of her 100th birthday. Former residents of evacuated towns can visit their homes once a month with special permissions but are not allowed to stay overnight inside the exclusion zone. A total of 160,000 people were ordered to leave their homes around Daiichi plant after the government announced the evacuation following the nuclear disaster in March 2011. Picture taken September 21, 2013. REUTERS/Damir Sagolj (JAPAN - Tags: DISASTER SOCIETY ENVIRONMENT RELIGION)

ATTENTION EDITORS: PICTURE 30 OF 53 FOR PACKAGE 'BROKEN LIVES OF FUKUSHIMA'. TO FIND ALL IMAGES SEARCH 'FUKUSHIMA DAMIR'

An employee of the Noryangjin fisheries wholesale market places a geiger counter on a water tank containing Japanese snappers to check for possible radioactive contamination at the Noryangjin fisheries wholesale market in Seoul September 6, 2013. South Korea banned all fishery imports from a swath of Japan around the crippled Fukushima nuclear plant on Friday, dealing another blow to Tokyo's credibility on the eve of the capital's bid to host the Olympics. REUTERS/Kim Hong-Ji (SOUTH KOREA - Tags: BUSINESS FOOD POLITICS)

A worker places a geiger counter on the surface of a fishery product, near mostly local fishery products on display, to check for possible radioactive contamination at a market in Seoul September 6, 2013. South Korea banned all fishery imports from a swath of Japan around the crippled Fukushima nuclear plant on Friday, dealing another blow to Tokyo's credibility on the eve of the capital's bid to host the Olympics. Just hours after Prime Minister Shinzo Abe broke away early from a global summit in Russia to personally back Tokyo's bid to host the 2020 Summer Games, Seoul extended a ban on 50 imports from eight Japanese prefectures, including Fukushima, due to concerns about radiation contamination. REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: BUSINESS ENVIRONMENT FOOD)

Re-enactors in period attire listen as a member of the Ancient and Honorable Artillery Company reads the United States Declaration of Independence from the balcony of the Old State House, part of Fourth of July Independence Day celebrations, in Boston, Massachusetts July 4, 2013. People across the United States gathered on Thursday for parades, picnics and fireworks at Independence Day celebrations, held under unprecedented security following the Boston Marathon bombings. Spectators waving U.S. flags and wearing red, white and blue headed for public gatherings in Boston, New York, Washington, Atlanta and other cities under the close watch of police armed with hand-held chemical detectors, radiation scanners and camera surveillance, precautions sparked by the deadly April 15 bombings. REUTERS/Brian Snyder (UNITED STATES - Tags: SOCIETY ANNIVERSARY)

A demonstrator holds a sign with a photograph of former U.S. spy agency NSA contractor Edward Snowden and the word "HERO" during Fourth of July Independence Day celebrations in Boston, Massachusetts July 4, 2013. People across the United States gathered on Thursday for parades, picnics and fireworks at Independence Day celebrations, held under unprecedented security following the Boston Marathon bombings. Spectators waving U.S. flags and wearing red, white and blue headed for public gatherings in Boston, New York, Washington, Atlanta and other cities under the close watch of police armed with hand-held chemical detectors, radiation scanners and camera surveillance, precautions sparked by the deadly April 15 bombings. REUTERS/Brian Snyder (UNITED STATES - Tags: SOCIETY ANNIVERSARY)

A United States flag casts a shadow on the ground as spectators wait for a public reading the United States Declaration of Independence, part of Fourth of July Independence Day celebrations, in Boston, Massachusetts July 4, 2013. People across the United States gathered on Thursday for parades, picnics and fireworks at Independence Day celebrations, held under unprecedented security following the Boston Marathon bombings. Spectators waving U.S. flags and wearing red, white and blue headed for public gatherings in Boston, New York, Washington, Atlanta and other cities under the close watch of police armed with hand-held chemical detectors, radiation scanners and camera surveillance, precautions sparked by the deadly April 15 bombings. REUTERS/Brian Snyder (UNITED STATES - Tags: SOCIETY ANNIVERSARY)

The Haig family stands for the United States pledge of allegiance before a public reading the United States Declaration of Independence, part of Fourth of July Independence Day celebrations, in Boston, Massachusetts July 4, 2013. People across the United States gathered on Thursday for parades, picnics and fireworks at Independence Day celebrations, held under unprecedented security following the Boston Marathon bombings. Spectators waving U.S. flags and wearing red, white and blue headed for public gatherings in Boston, New York, Washington, Atlanta and other cities under the close watch of police armed with hand-held chemical detectors, radiation scanners and camera surveillance, precautions sparked by the deadly April 15 bombings. REUTERS/Brian Snyder (UNITED STATES - Tags: SOCIETY ANNIVERSARY)

A re-enactor in period attire takes a photograph with his mobile phone before a public reading the United States Declaration of Independence, part of Fourth of July Independence Day celebrations, in Boston, Massachusetts July 4, 2013. People across the United States gathered on Thursday for parades, picnics and fireworks at Independence Day celebrations, held under unprecedented security following the Boston Marathon bombings. Spectators waving U.S. flags and wearing red, white and blue headed for public gatherings in Boston, New York, Washington, Atlanta and other cities under the close watch of police armed with hand-held chemical detectors, radiation scanners and camera surveillance, precautions sparked by the deadly April 15 bombings. REUTERS/Brian Snyder (UNITED STATES - Tags: SOCIETY ANNIVERSARY)

A member of the Ancient and Honorable Artillery Company stands amid confetti following a reading the United States Declaration of Independence, part Fourth of July Independence Day celebrations, in Boston, Massachusetts July 4, 2013. People across the United States gathered on Thursday for parades, picnics and fireworks at Independence Day celebrations, held under unprecedented security following the Boston Marathon bombings. Spectators waving U.S. flags and wearing red, white and blue headed for public gatherings in Boston, New York, Washington, Atlanta and other cities under the close watch of police armed with hand-held chemical detectors, radiation scanners and camera surveillance, precautions sparked by the deadly April 15 bombings. REUTERS/Brian Snyder (UNITED STATES - Tags: SOCIETY ANNIVERSARY TPX IMAGES OF THE DAY)

Re-enactors in period attire listen as a member of the Ancient and Honorable Artillery Company reads the United States Declaration of Independence from the balcony of the Old State House, part of Fourth of July Independence Day celebrations, in Boston, Massachusetts July 4, 2013. People across the United States gathered on Thursday for parades, picnics and fireworks at Independence Day celebrations, held under unprecedented security following the Boston Marathon bombings. Spectators waving U.S. flags and wearing red, white and blue headed for public gatherings in Boston, New York, Washington, Atlanta and other cities under the close watch of police armed with hand-held chemical detectors, radiation scanners and camera surveillance, precautions sparked by the deadly April 15 bombings. REUTERS/Brian Snyder (UNITED STATES - Tags: SOCIETY ANNIVERSARY)

Re-enactors march away from the Old State House following a public reading of the United States Declaration of Independence, part of July Fourth Independence Day celebrations, in Boston, Massachusetts July 4, 2013. People across the United States gathered on Thursday for parades, picnics and fireworks at Independence Day celebrations, held under unprecedented security following the Boston Marathon bombings. Spectators waving U.S. flags and wearing red, white and blue headed for public gatherings in Boston, New York, Washington, Atlanta and other cities under the close watch of police armed with hand-held chemical detectors, radiation scanners and camera surveillance, precautions sparked by the deadly April 15 bombings. REUTERS/Brian Snyder (UNITED STATES - Tags: ANNIVERSARY SOCIETY)

A demonstrator holds a sign with a photograph of former U.S. spy agency NSA contractor Edward Snowden and the word "HERO" during Fourth of July Independence Day celebrations in Boston, Massachusetts July 4, 2013. People across the United States gathered on Thursday for parades, picnics and fireworks at Independence Day celebrations, held under unprecedented security following the Boston Marathon bombings. Spectators waving U.S. flags and wearing red, white and blue headed for public gatherings in Boston, New York, Washington, Atlanta and other cities under the close watch of police armed with hand-held chemical detectors, radiation scanners and camera surveillance, precautions sparked by the deadly April 15 bombings. REUTERS/Brian Snyder (UNITED STATES - Tags: ANNIVERSARY SOCIETY)

A border police officer inspects a truck with an instrument that measures carbon dioxide levels, at a border crossing in Bajakovo, the Croatia-Serbia border, east Croatia, May 12, 2013. REUTERS/Antonio Bronic (CROATIA - Tags: SOCIETY POLITICS)

A worker takes radiation readings on the window of a bus at the screening point of the Tokyo Electric Power Company's (TEPCO) tsunami-crippled Fukushima Daiichi nuclear power plant in Fukushima prefecture June 12, 2013. REUTERS/Toshifumi Kitamura/Pool (JAPAN - Tags: DISASTER ENERGY ENVIRONMENT TPX IMAGES OF THE DAY)

A laboratory technician uses a Geiger counter to measure radiation in fish, which was caught close to the tsunami-crippled Fukushima Daiichi nuclear plant, at Fukushima Agricultural Technology Centre in Koriyama, Fukushima prefecture May 28, 2013. Commercial fishing has been banned near the tsunami-crippled nuclear complex since the March 2011 tsunami and earthquake. The only fishing that still takes place is for contamination research, and is carried out by small-scale fishermen contracted by the government. Picture taken May 28, 2013. REUTERS/Issei Kato (JAPAN - Tags: DISASTER BUSINESS ENVIRONMENT SOCIETY SCIENCE TECHNOLOGY TPX IMAGES OF THE DAY)

ATTENTION EDITORS: PICTURE 20 21 FOR PACKAGE 'TESTING FUKUSHIMA'S FISH' SEARCH 'FUKUSHIMA FISH' FOR ALL

Belgium's King Albert II (R) walks through a detector to measure potential radiation during a visit to the Belgian civil protection unit in Ghlin, near Mons April 18, 2013. REUTERS/Francois Lenoir (BELGIUM - Tags: DISASTER POLITICS ROYALS ENTERTAINMENT)

Workers carry out a radiation screening on a bus for a media tour at Tokyo Electric Power Co. (TEPCO)'s tsunami-crippled Fukushima Daiichi nuclear power plant in Fukushima prefecture March 6, 2013, ahead of the second-year anniversary of the March 11, 2011 tsunami and earthquake. Members of the media were allowed into the plant on Wednesday ahead of the second-year anniversary of the March 11, 2011 tsunami and earthquake, which triggered the world's worst nuclear crisis since Chernobyl. REUTERS/Issei Kato (JAPAN - Tags: DISASTER ANNIVERSARY ENERGY)

Kindergarten children play near a geiger counter, measuring a radiation level of 0.160 microsievert per hour, at Douhou Kindergarten, located about 50 km (31 miles) from the tsunami-crippled Fukushima Daiichi nuclear power plant, in Nihonmatsu, Fukushima prefecture February 25, 2013, ahead of the second-year anniversary of the March 11, 2011 earthquake and tsunami. As the World Health Organisation (WHO) says children in Fukushima may have a higher risk of developing thyroid cancer after the Daiichi nuclear disaster two years ago, mothers in Fukushima worry that local health authorities are not doing enough. Picture taken February 25, 2013. REUTERS/Chris Meyers (JAPAN - Tags: DISASTER HEALTH EDUCATION)

A reading on a radiation gauge shows 120 microsievert per hour next to the Reinforced Concrete Containment Vessel which is used for the reactor containment, at no.6 reactor building at Tokyo Electric Power Co.'s (TEPCO) Kashiwazaki Kariwa nuclear power plant, which is the world's biggest, in Kashiwazaki, November 12, 2012. Tokyo Electronic Power Co will probably have to delay restarting the world's biggest nuclear plant, which is sitting idle in the wake of the Fukushima disaster 20 months ago, further raising costs as the utility spends more on fossil fuels to generate electricity. Picture taken November 12, 2012. REUTERS/Kim Kyung-Hoon (JAPAN - Tags: ENERGY BUSINESS)

Michael Meyer (L-R), lead scientist of NASA's Mars Exploration Program, John Grotzinger, Mars Science Laboratory project scientist, California Institute of Technology, Don Hassler, principal investigator, Radiation Assessment Detector on MSL, Southwest Research Institute and Michael Malin, principal investigator, Mars Descent Imager on MSL, Malin Space Science Systems discuss during a news conference at NASA's Jet Propulsion Lab in Pasadena, Calfiornia August 2, 2012. A graphic of the MSL Curiousity rover is shown in the background. The rover is set to land in the late evening of August 5, 2012. REUTERS/Fred Prouser (UNITED STATES - Tags: SCIENCE TECHNOLOGY)

Workers are checked for radiation after their shift in the former Wuergassen nuclear energy plant near Beverungen June 27, 2012. By 2014, almost nothing will be left of what once was Germany's first commercial boiling water reactor. Germany's decision to shut down all nuclear plants by 2022, sparked by last year's Fukushima nuclear disaster in Japan, is a done deal. Picture taken June 27, 2012. REUTERS/Tom Kaeckenhoff (GERMANY - Tags: ENERGY BUSINESS)

Kaede Tanaka, 3, sits in her buggy with a Geiger counter placed on her lap, during an anti-nuclear protest in front of the Japanese prime minister's official residence in Tokyo June 8, 2012. Japanese Prime Minister Yoshihiko Noda said on Friday he has decided that two idled nuclear reactors in western Japan must be restarted to protect jobs and avoid damage to the economy, adding that steps had been taken to prevent a recurrence of the Fukushima disaster. REUTERS/Yuriko Nakao (JAPAN - Tags: POLITICS DISASTER CIVIL UNREST ENERGY)

A worker carries out radiation screening on a bus for a media tour at the Tokyo Electric Power Co's (TEPCO) tsunami-crippled Fukushima Daiichi nuclear power plant in Fukushima prefecture May 26, 2012. REUTERS/Tomohiro Ohsumi/Pool (JAPAN - Tags: DISASTER ENERGY)

A girl walks past a Geiger counter displaying the current radiation level with a reading of 0.252 microsievert/hour at a park in Iwaki, Fukushima prefecture, March 11, 2012, on the first anniversary of an earthquake and tsunami that killed thousands and set off a nuclear crisis. REUTERS/Kim Kyung-Hoon (JAPAN - Tags: ANNIVERSARY DISASTER)

Demonstrators march during an anti-nuclear protest to mark the first anniversary of an earthquake and tsunami that killed thousands and set off a nuclear crisis, as a monitor displaying the current radiation level shows a reading of 0.416 microsievert/hour, in Koriyama, Fukushima prefecture March 11, 2012. About 16,000 people gathered from across the country, took part in the demonstration, according to the organiser. REUTERS/Yuriko Nakao (JAPAN - Tags: ANNIVERSARY DISASTER POLITICS ENERGY)

Evacuees of Okuma town, who are dressed in protective suits, offer prayers for victims of the March 11, 2011 earthquake and tsunami disaster, as they stand near a nuclear radiation gauge during their temporary visit for the mourning event at the 20 km (12 miles) no-entry zone in Okuma town, Fukushima prefecture, March 11, 2012, to mark the first anniversary of the disasters that killed thousands and set off a nuclear crisis. The nuclear radiation gauge, which is held by a photographer, shows a reading of 22.4 microsievert. REUTERS/Kim Kyung-hoon (JAPAN - Tags: ANNIVERSARY DISASTER ENVIRONMENT)

Students walk near a geiger counter, measuring a radiation level of 0.12 microsievert per hour, at Omika Elementary School, located about 21 km (13 miles) from the tsunami-crippled Fukushima Daiichi nuclear power plant, in Minamisoma, Fukushima prefecture, March 8, 2012, ahead of the one-year anniversary of the March 11 earthquake and tsunami. The reopened elementary school, which is the nearest one located to the crippled nuclear power plant, had 205 students before the March 11, 2011 disasters. However, only 91 students remained following its reopening on October 17, 2011. REUTERS/Toru Hanai (JAPAN - Tags: DISASTER ANNIVERSARY ENVIRONMENT)

Saiko Yokozeki checks a radiation level with a Geiger counter on her piano in Tokyo March 3, 2012. Becquerels and sieverts are part of everyday vocabulary, Geiger counters are household items in parts of the country, saving electricity has become a year-round activity and the myth of clean and safe nuclear energy is dead. Picture taken March 3, 2012. To match Insight JAPAN-TSUNAMI/CHANGE REUTERS/Kim Kyung-Hoon (JAPAN - Tags: ANNIVERSARY DISASTER SOCIETY)

Saiko Yokozeki holds a a Geiger counter as she plays with her children at a playground nearby her home in Tokyo March 3, 2012. Becquerels and sieverts are part of everyday vocabulary, Geiger counters are household items in parts of the country, saving electricity has become a year-round activity and the myth of clean and safe nuclear energy is dead. Picture taken March 3, 2012. To match Insight JAPAN-TSUNAMI/CHANGE REUTERS/Kim Kyung-Hoon (JAPAN - Tags: ANNIVERSARY DISASTER SOCIETY)

A radiation monitor indicates 131.00 microsieverts per hour near the No.4 and No.3 buildings at the tsunami-crippled Tokyo Electric Power Co. (TEPCO)'s Fukushima Daiichi nuclear power plant in Fukushima prefecture February 28, 2012. Members of the foreign media were allowed into the plant on Tuesday ahead of the first anniversary of the March 11, 2011 tsunami and earthquake which triggered the world's worst nuclear crisis since Chernobyl. REUTERS/Kimimasa Mayama/Pool (JAPAN - Tags: DISASTER ENVIRONMENT ENERGY)

ATTENTION EDITORS - PICTURE 12 OF 26 OF PICTURE PACKAGE 'INVISIBLE SNOW REVISITED'. TO FIND ALL PICTURES SEARCH 'INVISIBLE SNOW'
A Geiger counter reads 20.97 microsieverts per hour as a volunteer (unseen) checks for "hot spots" during a workshop to inform the local residents on how to clean up radioactive contamination in Fukushima, northern Japan February 4, 2012. Last summer, Zen priest Koyu Abe grew and distributed sunflowers and other plants, such as field mustard and amaranthus, in an effort to lighten the impact of the radiation and cheer local residents. Now he is trading his ceremonial robes for a protective mask, working with volunteers to track down lingering pockets of radiation and cleaning them up. Picture taken February 4, 2012. REUTERS/Yuriko Nakao (JAPAN - Tags: POLITICS RELIGION DISASTER)

An evacuated resident in protective wear checks radiation levels (85.1 microsieverts per hour) inside the street gully of a factory, in Namie town inside the exclusion zone of a 20-km (12-mile) radius around the crippled Fukushima Daiichi nuclear power plant in Fukushima prefecture January 28, 2012. A 9.0-magnitude earthquake and massive tsunami on March 11, 2011 triggered the world's worst nuclear accident in 25 years and forced residents around Fukushima Daiichi nuclear power plant to flee, leaving behind in many cases their household belongings or pets. The triple whammy is still forcing more than 150,000 people from Fukushima prefecture to take refuge, nearly half of them from the no-go zone. Picture taken January 28, 2012. REUTERS/Issei Kato (JAPAN - Tags: DISASTER POLITICS)

Rescue workers dressed in protective suits measure radioactivity as they participate in a training exercise simulating a nuclear accident initiated by an earthquake and affecting the area surrounding the nuclear site of Cadarache January 17, 2012. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: DISASTER ENERGY)

A German police officer uses a Geiger counter to measure the radiation of a Castor container on a transport train, during a stop in Neunkirchen near Saarbruecken November 25, 2011. The Castor (Cask for Storage and Transport Of Radioactive material) train is carrying 11 containers of spent German nuclear fuel on route from France after being reprocessed, to the nuclear waste storage facility of Gorleben in north eastern Germany. REUTERS/Alex Domanski (GERMANY - Tags: POLITICS ENVIRONMENT)

A man (C) is checked for radiation after arriving at a vehicle decontamination centre at J-Village, a soccer training complex now serving as an operation base for those battling Japan's nuclear disaster, near Tokyo Electric Power Co. (TEPCO)'s tsunami-crippled Fukushima Daiichi Nuclear Power Plant in Fukushima prefecture, November 11, 2011, eight months after the disaster. REUTERS/David Guttenfelder/Pool (JAPAN - Tags: DISASTER ENERGY)

A Libyan representative uses a Geiger counter to measure radiation at the Tajoura nuclear research center in Tripoli September 5, 2011. Libya's uranium enrichment programme was dismantled after Gaddafi renounced weapons of mass destruction eight years ago and sensitive material and documentation including nuclear weapons design information were confiscated. But the country's Tajoura research centre continues to stock large quantities of radioisotopes, radioactive waste and low-enriched uranium fuel after three decades of nuclear research and radioisotope production, former senior U.N. inspector Olli Heinonen said. REUTERS/Anis Mili (LIBYA - Tags: POLITICS CONFLICT CIVIL UNREST MILITARY ENERGY)

A geiger counter is pictured during a monitoring by a company clearing radiation particles at an elementary school in Fukushima, northern Japan August 6, 2011. At a temple in Fukushima thousands of sunflowers have been planted to help fight the radiation. "It is as if an invisible snow had fallen on Fukushima and continued to fall, covering the area," said Koyu Abe, chief monk at the Buddhist Joenji temple. Sunflowers were used near Chernobyl after the 1986 nuclear accident to extract radioactive caesium from contaminated ponds nearby. Japanese scientists are carrying out tests to prove their usefulness in fighting radiation. Picture taken August 6, 2011. REUTERS/Yuriko Nakao (JAPAN - Tags: DISASTER RELIGION ENVIRONMENT SCI TECH)

A geiger counter is placed in front of sunflowers in full bloom in Fukushima, northern Japan August 6, 2011. At a temple in Fukushima thousands of sunflowers have been planted to help fight the radiation. "It is as if an invisible snow had fallen on Fukushima and continued to fall, covering the area," said Koyu Abe, chief monk at the Buddhist Joenji temple. Sunflowers were used near Chernobyl after the 1986 nuclear accident to extract radioactive caesium from contaminated ponds nearby. Japanese scientists are carrying out tests to prove their usefulness in fighting radiation. Picture taken August 6, 2011. REUTERS/Yuriko Nakao (JAPANDISASTER ENVIRONMENT - Tags: DISASTER RELIGION ENVIRONMENT SCI TECH IMAGES OF THE DAY)

An employee of Japan's restaurant chain operator Zensho Co conducts a radiation check on a piece of domestic beef at its central research center in Kawasaki, near Tokyo July 27, 2011. Chief Cabinet Secretary Yukio Edano said on July 19 that the government will boost its inspections for contamination by testing all beef cattle from evacuation areas around the crippled Fukushima nuclear power plant for radiation as well as inspecting all farms in the prefecture. Zensho is conducting radiation checks on all of its domestic beef, shipped from 14 prefectures to ensure food safety. The company has been conducting checks from July 20, with no reported case of radiation contaminated beef, according to the company spokesperson. REUTERS/Yuriko Nakao (JAPAN - Tags: POLITICS FOOD)

Sixty-three-year-old Shukuko Kuzumi measures radiation near her cake shop in Iwaki, about 50 km south of the tsunami-crippled Fukushima Daiichi nuclear power plant in Fukushima Prefecture. The radiation monitor indicates 0.34 microsieverts per hour at the place. Hundreds of workers from the nuclear plant are staying at inns in the town, once known for a splashy Hawaiian-themed resort. Picture taken June 12, 2011. REUTERS/Issei Kato (JAPAN - Tags: DISASTER ENVIRONMENT EMPLOYMENT BUSINESS)

Fuji Electric Co.'s radiation dose meters to be sold to electric companies that are nuclear power owners or operators, are lined up at an assembly factory in Tokyo May 20, 2011. Demand for radiation dose meters has risen about five times as compared to the numbers before the March 11 earthquake and tsunami which crippled the Fukushima Daiichi nuclear complex and triggered radiation leaks, according to the company spokesperson. REUTERS/Yuriko Nakao (JAPAN - Tags: DISASTER EMPLOYMENT BUSINESS SCI TECH) ENERGY)

Fuji Electric Co's pocket-size radiation dose meters, mainly used in hospitals and universities, are placed to undergo an operation check at an assembly factory in Tokyo May 20, 2011. Demand for radiation dose meters has risen about five times as compared to the numbers before the March 11 earthquake and tsunami which crippled the Fukushima Daiichi nuclear complex and triggered radiation leaks, according to the company spokesperson. REUTERS/Yuriko Nakao (JAPAN - Tags: DISASTER EMPLOYMENT BUSINESS SCI TECH) ENERGY)

A worker at Japan's Fuji Electric Co., assembles a radiation dose meter to be sold to electric companies that are nuclear power owners or operators, at a factory in Tokyo May 20, 2011. Demand for radiation dose meters has risen about five times as compared to the numbers before the March 11 earthquake and tsunami which crippled the Fukushima Daiichi nuclear complex and triggered radiation leaks, according to the company spokesperson. REUTERS/Yuriko Nakao (JAPAN - Tags: DISASTER EMPLOYMENT BUSINESS ENERGY SCI TECH)

Fuji Electric Co.'s radiation dose meters to be sold to electric companies that are nuclear power owners or operators, are charged before an operation check at an assembly factory in Tokyo May 20, 2011. Demand for radiation dose meters has risen about five times as compared to the numbers before the March 11 earthquake and tsunami which crippled the Fukushima Daiichi nuclear complex and triggered radiation leaks, according to the company spokesperson. REUTERS/Yuriko Nakao (JAPAN - Tags: DISASTER EMPLOYMENT BUSINESS ENERGY)

Fuji Electric Co.'s radiation dose meters to be sold to electric companies that are nuclear power owners or operators, are pictured at an assembly factory in Tokyo May 20, 2011. Demand for radiation dose meters has risen about five times as compared to the numbers before the March 11 earthquake and tsunami which crippled the Fukushima Daiichi nuclear complex and triggered radiation leaks, according to the company spokesperson. REUTERS/Yuriko Nakao (JAPAN - Tags: DISASTER EMPLOYMENT BUSINESS ENERGY)

Japan's Fuji Electric Co employees assemble radiation dose meters to be sold to electric companies that are nuclear power owners or operators, at a factory in Tokyo May 20, 2011. Demand for radiation dose meters has risen about five times as compared to the numbers before the March 11 earthquake and tsunami which crippled the Fukushima Daiichi nuclear complex and triggered radiation leaks, according to the company spokesperson. REUTERS/Yuriko Nakao (JAPAN - Tags: DISASTER EMPLOYMENT BUSINESS ENERGY)

A radiation monitor indicates 0.41 microsieverts per hour at Mutsuo Mito's dairy farm in Shinchimachi, Fukushima Prefecture, northern Japan, April 13, 2011, located about 50km from the tsunami-crippled nuclear reactor. Mito's farm has been throwing away about 1,200 litres of fresh milk daily and he has submitted milk samples to the government twice already, but have yet to receive a response as to whether they will be allowed to sell their milk since shipments of unprocessed milk . Generally, people are exposed to about 1 to 10 millisieverts of radiation a year from natural background radiation, caused by radioactive substances in the air and soil. One thousand microsieverts make 1 millisievert. REUTERS/Kim Kyung-Hoon (JAPAN - Tags: AGRICULTURE ANIMALS BUSINESS DISASTER ENERGY ENVIRONMENT)