Category Archives: Fukushima

Information about the Fukushima Daiichi site.

Status Update – 3/19/2011 at 10:00 am EDT

UPDATE AS OF 10 A.M. EDT, SATURDAY, MARCH 19 (per NEI): At a March 19 news conference, Japan’s Chief Cabinet Secretary Yukio Edano said that sea water injection is continuing at reactors 1, 2 and 3 at the Fukushima Daiichi … Continue reading

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Progress Update at Fukushima Daiichi – 3/17/11 (3:30 pm EST)

The high levels of radiation braved by workers at the scene in Fukushima Daiichi appear to have reduced after the expansion of the workforce and announcements of infrastructure improvements to come. In recent days emergency managers were faced with an … Continue reading

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Helicopters Dropping Water on Affected Reactors

UPDATE AS OF 9:00 P.M. EDT, WEDNESDAY, MARCH 16: Crews began aerial water spraying operations from helicopters to cool reactor 3 at Fukushima Daiichi shortly before 9 p.m. EDT on Wednesday, March 16. The operation was planned for the previous … Continue reading

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Introduction to Radiation Health Effects and Radiation Status at Fukushima

What is radiation? Where does it come from and what is it used for? Radiation is energy that propagates through matter or space. Radiation energy can be electromagnetic or particulate. Radiation is usually classified into non-ionizing (visible light, TV, radio … Continue reading

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News Updates and Current Status of Facilities

Units 1 and 2: TEPCO has released estimates of the levels of core damage at these two reactors: 70% damage at Unit 1 and 33% at Unit 2. They have also stated that Unit 1 is being adequately cooled. Outlook: … Continue reading

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Unit 2 Explosion and Unit 4 Spent Fuel Pool Fire

Explosion at Unit 2 It was reported earlier today that the explosion at Unit 2 of the Fukushima Daiichi plant damaged the suppression chamber.  As discussed in the previous post, the suppression chamber/torus (i.e. donut shape vessel containing water) is … Continue reading

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Explanation of Hydrogen Explosions at Units 1 and 3

Explosions at units 1 and 3 occurred due to similar causes. When an incident occurs in a nuclear power plant such as a loss of coolant accident or when power is lost, usually the first response is to depressurize the … Continue reading

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Damage to Fukushima Daiichi 2 [World Nuclear News]

Loud noises were heard at Fukushima Daiichi 2 at 6.10am this morning. A major component beneath the reactor may be damaged. Confirmation of loud sounds this morning came from the Nuclear and Industrial Safety Agency (NISA). It noted that “the … Continue reading

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Status Update – 3/14/11 at 1:00 pm EST (Source – The Federation of Electric Power Companies of Japan (FEPC))

As of 1:00PM (EST), March 14, 2011 * Radiation Levels o At 9:37AM (JST) on March 14, a radiation level of 3130 micro sievert was recorded at the Fukushima Daiichi Nuclear Power Station. o At 10:35AM on March 14, a … Continue reading

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