Analysis of information sources in references of the Wikipedia article "Radiation effects from the Fukushima Daiichi nuclear disaster" in English language version.
Tokyo Electric Power Company, or TEPCO, says it has detected a record high 5 million becquerels per liter of radioactive strontium in groundwater collected last July from one of the wells close to the ocean. ... Based on the result, levels of radioactive substances that emit beta particles are estimated to be 10 million becquerels per liter, which is more than 10 times the initial reading.
{{cite news}}: |author= has generic name (help){{cite journal}}: |author16= has generic name (help){{cite web}}: CS1 maint: archived copy as title (link){{cite web}}: CS1 maint: archived copy as title (link)Tokyo officials say they detected 0.8 of a micro-sievert in the morning, which is about 27 times what's considered normal. Health authorities say it's now fallen to about twice the normal level in Tokyo but they need to keep a close watch on it.
Tokyo Electric Power Company, or TEPCO, says it has detected a record high 5 million becquerels per liter of radioactive strontium in groundwater collected last July from one of the wells close to the ocean. ... Based on the result, levels of radioactive substances that emit beta particles are estimated to be 10 million becquerels per liter, which is more than 10 times the initial reading.
{{cite web}}: CS1 maint: archived copy as title (link){{cite journal}}: |author16= has generic name (help){{cite journal}}: |author16= has generic name (help)The injured workers' dosimeters suggested exposure to 170 millisieverts of radiation. But the institute said that the actual amount of radiation the workers are thought to have been exposed to in the water is 2 to 6 sieverts.
{{cite web}}: CS1 maint: archived copy as title (link){{cite news}}: |author= has generic name (help)The injured workers' dosimeters suggested exposure to 170 millisieverts of radiation. But the institute said that the actual amount of radiation the workers are thought to have been exposed to in the water is 2 to 6 sieverts.
Tokyo officials say they detected 0.8 of a micro-sievert in the morning, which is about 27 times what's considered normal. Health authorities say it's now fallen to about twice the normal level in Tokyo but they need to keep a close watch on it.
{{cite web}}: CS1 maint: archived copy as title (link){{cite web}}: CS1 maint: archived copy as title (link)The injured workers' dosimeters suggested exposure to 170 millisieverts of radiation. But the institute said that the actual amount of radiation the workers are thought to have been exposed to in the water is 2 to 6 sieverts.
On February 6, TEPCO announced that 5 million Bq/Liter of radioactive strontium was detected from the groundwater sample taken on June 5 last year from one of the observation wells on the embankment of Fukushima I Nuclear Power Plant. The density is 160,000 times that of the legal limit for release into the ocean, and it is about 1,000 times that of the highest density in the groundwater that had been measured so far (5,100 Bq/L). TEPCO didn't disclose the result of measurement of strontium alone, as the company believed there was a possibility that the result of measurement was wrong. As to this particular sample, TEPCO had announced on July last year that the sample had contained 900,000 Bq/L of all-beta including strontium. On February 6, TEPCO explained that they had "underestimated all of the results of high-density all-beta, which exceeded the upper limit of measurement." This particular sample may contain about 10 million Bq/L of all-beta, according to TEPCO. The company recently switched to a different method of analysis that uses diluted samples when the density of radioactive materials is high.