Tag Archives: reactor

Typhoon threat at Fukushima reactor site

Typhoon Roke, the 15th typhoon of the season in the northwest Pacific, is passing in the vicinity of the Fukushima reactor site.  It has already left in its wake significant flooding in Nagoya (southwest of Tokyo) and on the western … Continue reading

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Evacuations lacked key plume model input

A recent frontpage story in the New York Times explores in more depth an evacuation tragedy that plagued the Fukushima nuclear incident.  The event they focus on is the evacuation of Namie, first reported by the Daily Yomiuri on June … Continue reading

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Scientific source term estimation of radiation release

Researchers at the Japan Atomic Energy Agency have just published a scientific paper reporting on detailed source term estimation for the airborne release from the Fukushima Daiichi Plant.  The paper in “Journal of Nuclear Science and Technology” can be found here. … Continue reading

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Upward revisions to radiation estimates

Upward revisions of the scale of the radiation damage continue to be released.  Here is a summary of a few from the past several days. Yesterday the Japanese government reported to the IAEA that reactors 1-3 all experienced a nuclear … Continue reading

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High radiation measured at reactor 1

Today radioactive steam emitting from reactor 1 was found to contain 3000-4000 millisieverts/hr of radiation.  The steam is attributed to the water pooling in the basement of reactor 1.  (This is reported to be the highest level measured in the … Continue reading

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Release of data by government continues

Japanese officials continue to come under attack for their failure to fully release data related to the radiation contamination – both radiation measurements and additional overlooked plume forecasts.  The high radiation measured on the ground 30-50 km from the reactor … Continue reading

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Redundant measures and safety scenarios

One of the reasons given by the Japanese government for the delay in generating plume forecasts is that their model system, SPEEDI, was hardwired to receive radiation data at the Fukushima nuclear plant site.  When the sensors failed in the … Continue reading

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