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Originally posted by kdog1982
So,hey,how is it going?
Been awhile since I have been here.
So,in condensed update,are we doomed,or not?
Uranium Oxide. The most common forms of uranium oxide are U3O8 and UO2. Both oxide forms are solids that have a low solubility in water and are relatively stable over a wide range of environmental conditions.
Uranium Hexafluoride. UF6 is the chemical form of uranium that is used during the uranium enrichment process. Within a reasonable range of temperature and pressure, it can be a solid, liquid, or gas. Solid UF6 is a white, dense, crystalline material that resembles rock salt. UF6 does not react with oxygen, nitrogen, carbon dioxide, or dry air, but it does react with water or water vapor (including humidity in the air). When UF6 comes into contact with water, such as water vapor in the air, the UF6 and water react, forming corrosive hydrogen fluoride (HF) and a uranium-fluoride compound called uranyl fluoride (UO2F2). For this reason, Depleted Uranium Hexafluoride ...Insoluble UF6 is always handled in leak-tight containers and processing equipment. Although very convenient for processing, UF6 is not considered a preferred form for long-term storage or disposal because of its relative instability.
Uranium Tetrafluoride. UF4 is often called green salt because of its characteristic color. It is generally an intermediate in the conversion of UF6 to U3O8, UO2, or uranium metal because it can be readily converted to any of these forms. UF4 is a solid composed of agglomerating particles with a texture similar to baking soda.
The Japanese government on Monday proposed a site for the final disposal of highly radioactive waste that has accumulated in Tochigi Prefecture due to the March 2011 nuclear accident in neighboring Fukushima Prefecture.
Vice Environment Minister Katsuhiko Yokomitsu proposed a national forest in the prefecture's Yaita city as the site at a meeting with Tochigi Gov. Tomikazu Fukuda in Utsunomiya.
The governor asked the government to get the local community's acceptance and provide full explanations.
But Yaita Mayor Tadao Endo, who received the proposal from Yokomitsu at a later meeting, said he cannot accept the proposal.
The Environment Ministry plans to hold briefings for local residents over six months from October and transport the waste to the site from around the summer of 2014.
It has estimated that some 4,445 tons of highly radioactive waste, including mud with radioactive cesium content of more than 8,000 becquerels per kilogram, had been designated for disposal in Tochigi Prefecture as of Aug. 3. Such waste is expected to finally total some 9,000 tons in the prefecture.
Among the nine prefectures where such designated radioactive waste has emerged due to the Fukushima Daiichi nuclear plant accident, Tochigi became the first one for which a specific disposal site was proposed.
The government plans that the nine prefectures will each undertake the final disposal of their respective designated radioactive waste.
Miyagi, Ibaraki and Chiba prefectures as well as Tochigi have agreed to create their respective disposal facilities upon receiving approval from relevant local communities.
The ministry plans to propose specific sites for the three prefectures within September.
Copyright 2012 Kyodo News
The operator of the crippled Fukushima Daiichi nuclear power plant said Monday it has made progress in alleviating a problem affecting the flow of cooling water into the severely damaged reactors.
Tokyo Electric Power Co. reported late last week that the flow of cooling water into the reactors had declined for unknown reasons, sometimes even to a rate below the minimum needed to keep the melted fuel cool.
But TEPCO spokesman Junichi Matsumoto said Monday that action taken the previous day to deal with the problem appears to be showing "a certain effect."
Suspecting that the pipes leading to the reactors may have become partially clogged with something, workers on Sunday opened wider the valves controlling the flow of water, Matsumoto told a press conference.
The step appeared to work and now TEPCO does not have to adjust the flow of coolant water as frequently, Matsumoto said, adding the utility will keep the valves open wider until it nails down the cause.
The spokesman said the amount of water may have declined because of an accumulation of metallic powder inside the pipes, possibly as a result of the replacement of pipes or other work involving a tank storing the coolant.
The current water injection system was set up after the March 2011 earthquake and tsunami triggered the nuclear accident. The plant's Nos. 1 to 3 reactors suffered meltdowns but the fuel is now believed to be stably cooled.
Copyright 2012 Kyodo News
The government estimates that if Japan has no electricity generated from nuclear power in 2030, household energy bills at that time could be doubled the 2010 level, according to a government document made available Monday.
The estimate was compiled by Economy, Trade and Industry Minister Yukio Edano, after Prime Minister Yoshihiko Noda asked for guidance on the challenges the nation could face if the government decided to reduce Japan's dependency on nuclear power to zero following last year's Fukushima nuclear crisis.
According to the government estimate, the average monthly household energy bill could be as high as 32,243 yen in 2030 if Japan withdraws from nuclear power generation by then, compared with 16,900 yen in 2010.
The paper also said if Japan loses cooperation from municipalities in areas hosting facilities for the country's long-standing policy of reprocessing spent nuclear fuel, such as Aomori Prefecture in northern Japan, the nation will have to withdraw from nuclear power "immediately."
The government is considering setting a target to end nuclear power generation eventually under a new energy policy, and is expected to discuss expected effects of abandoning nuclear power when it holds a ministerial meeting Tuesday morning, sources close to the matter said.
Copyright 2012 Kyodo News
Originally posted by Aircooled
I kept going through the pictures for shots of our truck bay opening. Found this little gem from May 26th 012. Have a look at the base of the south wall of # 4......
Purple, I don't ENE so feel free to send this off to them if you think it's important enough. It looks to me like the whole south wall is severed off the foundation. Just free-floating.
Maybe we can rattle tepco's cage a bit more?
amount of water may have declined because of an accumulation of metallic powder inside the pipes, possibly as a result of the replacement of pipes or other work involving a tank storing the coolant.
....After determining that the system is not low on refrigerant, I look for debris in the valve. The only way to know for sure, is to disassemble the valve. Look for a fine white powder. This powder is normally from a deteriorating filter-drier core. The filter-drier must be replaced. I have also found small metal shavings left over from installation. They accumulate and block refrigerant flow.