' Several epidemiological studies in the years since the accident have supported the conclusion that radiation releases from the accident had no perceptible effect on cancer incidence in residents near the plant.
For girls exposed to radiation from the accident as infants, the report found a 4% increase above the lifetime expected risk of solid tumours and a 6% increase above that expected for breast cancer.
Radiation was first discovered by accident in the area 20 years ago and concerns have grown with parts of the beach being cordoned off and a fishing ban imposed in the bay earlier this year.
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The acute radiation exposure that occurs from an accident is expected to occur over several hours.
Even if the nuclear accident is brought under control swiftly, and the release of radiation turns out not to be large enough to damage public health, this accident will have a huge impact on the nuclear industry, both inside and outside Japan.
Radiation was discovered at the beach by accident 20 years ago.
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The shield building is intended to protect the reactor from damage and provide a radiation barrier, in the event of an accident.
The 2011 nuclear-power-plant accident scared away visitors worried about radiation.
Ingestion of the short-lived isotope iodine-131, with its well-known risk of thyroid cancer when absorbed in the thyroid glands of children and young people, was the only major radiation-related health effect of the Chernobyl accident on the public.
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Because of public radiation fears broadcast in the press after the Fukushima accident, Japan cut the limit in half hoping it would have a calming influence.
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Limited numbers of tourists are allowed into the accident zone for brief visits, despite radiation being well above normal, but scientists say generations may pass before it is entirely safe for people to return.
Ten years after the explosion, a CNN team visited Chernobyl to ascertain the long-term effects of radiation exposure for those living near Chernobyl during the accident, for cleanup workers or "liquidators, " or for those who continued to live in areas that were classified as polluted.
There were no injuries and little release of radiation from that incident, which remains the worst commercial nuclear accident in U.S. history.
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After the Chernobyl disaster, about 6, 000 children exposed to radiation later developed thyroid cancer, because many drank contaminated milk after the accident.
The government also has released ambitious plans to decontaminate surrounding areas to radiation levels that while still many times what they were before the accident are considered well below levels that scientists have found to be dangerous.
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The World Health Organization estimates that over the century following the accident, as many as 9, 000 people may die prematurely from radiation exposure.
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The aftermath of the Chernobyl nuclear accident, for example, might reasonably be expected to have revealed the effects of radiation on health.
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Radiation played no role in the coincidental deaths of six Fukushima workers in the time since the accident, who died from accidents, e.g.
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Despite all of the frightening reports that dominated TMI media coverage at the time of and over years since the accident, the important lost message is that no one was injured or killed, and very little radiation was released.
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