Tag "recriticality"

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Plant hazard

[Breaking] Tepco “Steam / Gas coming up from the top of reactor3, ambient dose and dust not verified”

According to Tepco, steam / gas was observed on the top of reactor3. At 8:20 AM of 7/18/2013, a subcontract worker found steam / gas coming up from the middle

Plant hazard

“Iodine-131” detected from various school lunch ingredients from North Kanto area

According to Obihiro city Hokkaido, Iodine-131 was detected from some school lunch ingredients produced in North Kanto area. Iodine-131 is a fission product. Half-life is 8 days. It is used

Contaminated water crisis Core removing struggle Cover-ups Plant hazard

[Column] What is happening in reactor2 and what can be caused ?

A thermometer of RPV in reactor2 keeps indicating the increasing temperature. Tepco used assert the thermometer was disordered every time they saw it indicate increasing temperature. However this time, another

Plant hazard

[Column] 3 facts to support the hypothesis that fractured nuclear fuel is in individual stages of nuclear reaction

This is not a widely known fact but 12/17/2012 was a historical day of Fukushima plant. In the evening of that day, the RPV temperature want higher than the temperature

Contaminated water crisis Domestic and global Environment Plant hazard

Fukushima coolant water comes directly to underground water ? Boron detected from underground water in Iwaki

On 10/25/2012, Fukushima prefectural board of education announced 6.9 mg/L of boron was detected from the underground water in Iwaki city Fukushima. The safety limit is 1 mg/L. Boric acid

Contaminated water crisis Core removing struggle Plant hazard

Possible recriticality in reactor2

  Weekly Asahi reported they obtained the email leaked from Tepco. It was sent from a staff of engineering devision to his coworker and a nuclear expert. It warned the

Plant hazard Spent Fuel Pools

Iodine 131 was measured from SFP4

Last year, 4/12/2011, 2.2E+8 Bq/m3 of Iodine 131 was measured from the water of SFP4 to suggest the spent fuel had recriticality after 311. Cesium 134/137 were also measured, but

Plant hazard

Tepco is going to inject boric acid

Following up this article ..Attention : Reactor 2 is still being heated On the press conference of 2/6/2012 PM, Tepco announced they are going to add 960 Kg of boric

Domestic and global Environment Plant hazard

Japanese government will stop measuring Iodine from tapwater

Following up this article .. Increasing leakage of Iodine 131 Ministry of Education, Culture, Sports, Science and Technology will quit measuring Iodine131 from tapwater after 4/1/2012. They have been measuring cesium