Radiation in No. 3 reactor too high for work
The operator of the damaged Fukushima Daiichi nuclear plant says radiation levels in one of the reactor buildings remain too high for workers to do their jobs.
Tokyo Electric Power Company, or TEPCO, sent 9 workers into the No.3 reactor building for about 20 minutes on Thursday, in a bid to start stabilizing the reactor.
The utility plans to inject nitrogen gas into the containment vessel to prevent accumulated hydrogen from causing an explosion. It also intends to install a system to cool the reactor with circulating water.
The workers withdrew after measuring radiation of 100 millisieverts per hour near the reactor's containment vessel. TEPCO says it intended to limit the workers' exposure to below 5 millisieverts per hour. But as all 9 received higher doses, it has suspended work while considering a course of action.
Friday, June 10, 2011 20:23 +0900 (JST)
http://www3.nhk.or.jp/daily/english/10_26.htmlOther updates:
Retailer told to stay mum about radiation level in tea
SHIZUOKA (Kyodo) -- Shizuoka Prefecture told a Tokyo-based mail order retailer to refrain from carrying information on its website that radioactive materials in excess of the standard limit were detected in tea grown in the prefecture, the retailer said Friday.
A prefectural official told Radishbo-ya Co., after the retailer made a query to the local government Monday, not to disclose the finding for a while on fears that the message could cause unwarranted harm to Shizuoka tea growers, adding that the prefecture would confirm it on its own, the firm said.
The firm, for its part, sent purchasers of the tea letters informing them about the finding, while offering to recall the products.
Shizuoka is famous for its tea production...
http://mdn.mainichi.jp/mdnnews/news/20110610p2g00m0dm090000c.htmlFukushima workers' exposure tops 650mSV
Detailed tests have found that 2 workers who were exposed to radiation at the crippled Fukushima nuclear plant received doses of more than twice the government-mandated emergency limit.
The men in their 30s and 40s were each found in early June to have been exposed to over 250 millisieverts -- the new higher limit for exposure that the government introduced after problems began at the Fukushima Daiichi plant.
The National Institute of Radiological Sciences conducted 2 more rounds of detailed tests to measure the amount of radioactive iodine and cesium the 2 men could have inhaled.
After analyzing the men's work shifts since the March 11th disaster, the Institute concluded that the man in his 30s was exposed to 678 millisieverts, and the man in his 40s, 643 millisieverts. Internal exposure accounted for more than 80 percent of the figures...
Friday, June 10, 2011 19:45 +0900 (JST)
http://www3.nhk.or.jp/daily/english/10_33.htmlRadioactive strontium detected in 11 places in Fukushima Prefecture.
2011/06/10
Low levels of radioactive strontium have been detected in soil at 11 locations in Fukushima Prefecture, the government announced June 8.
The radioactive strontium was found in samples taken at places around the region where radioactive cesium was previously detected.
The government says continued monitoring is necessary because some strontium have a long half-life and could affect human health for a prolonged period if absorbed by the body. However, at the levels found, the substance is not a health hazard, the ministry said.
The Ministry of Education, Culture Sports, Science and Technology said it took soil samples between April 10 and May 19...
http://www.asahi.com/english/TKY201106090172.htmlSludge from contaminated water would be packed with radioactive substances: TEPCO
Sludge that will be generated in the process of treating radioactive water at the tsunami-hit Fukushima No. 1 Nuclear Power Plant is estimated to contain 100 million becquerels of radioactive substances per cubic centimeter, the plant operator said.
Tokyo Electric Power Co. (TEPCO) made the estimation in a report on the water treatment system submitted to the government's Nuclear and Industrial Safety Agency (NISA).
While trying to begin treating the increasing volumes of radioactive water at an early date, TEPCO has failed to indicate how it will store the toxic sludge or a final disposal site in its road map to bring the crippled plant under control.
TEPCO will launch treatment of the radioactive water on June 15 at the earliest. Specifically, it will use special equipment produced by Kurion Inc. of the United States and France-based Areva -- which have broad experience removing radioactive substances -- to separate sludge contaminated with radioactive substances from the water. The sludge is expected to contain such high levels of radiation because radioactive substances in it will be condensed...
http://mdn.mainichi.jp/mdnnews/news/20110610p2a00m0na010000c.html