tons of contaminated water leaks at fukushima nuclear plant

Download Tons of Contaminated Water Leaks at Fukushima Nuclear Plant

Post on 03-Apr-2018

217 views

Category:

Documents

0 download

Embed Size (px)

TRANSCRIPT

  • 7/28/2019 Tons of Contaminated Water Leaks at Fukushima Nuclear Plant

    1/3

    Register Log In

    Behind the NewsBehind the News EconomyEconomy Cool JapanCool Japan ViewsViews AsiaAsia SportsSports 3/11 Disaster in Japan3/11 Disaster in Japan GLOBEGLOBE SpecialSpecial ForumForum TravelTravel What's NewWhat's New

    Fukushima nuclear crisisFukushima nuclear crisis Life and DeathLife and Death Quake and TsunamiQuake and Tsunami RecoveryRecovery AnalysisAnalysis OpinionOpinion

    120 tons of contaminated water leaks atFukushima nuclear plant

    Prev ious Article

    Anti-rat work caused latestcooling system problem atFukushima nuclear plant

    Next Article

    Fishermen alarmed by waterleak at nuclear plant

    Fukushima No. 1 nuclear powe r plant

    language

    Tweet 41 Recommend 64 8

    April 06, 2013

    About 120 tons of contaminated water has leaked from an undergroundstorage tank at the Fukushima No. 1 nuclear plant and may have mixed

    with underground water, Tokyo Electric Power Co. said April 6.

    TEPCO estimated that the water contained about 710 billion becquerels ofradioactivity and leaked through the joints of protective sheets of thestorage tank.

    The water had passed through a filtration system before leaking, and itsradioactivity level was about half that of water that has yet to be filtered,according to TEPCO.

    TEPCO acknowledged that the contaminated water likely soaked the soilsurrounding the tank and may have reached underground water.

    But "the contaminated water has not seeped into the sea, TEPCOspokesman Masayuki Ono said at a news conference before dawn on April6. Ono noted that the storage tank is located 800 meters from the PacificOcean.

    About 13,000 tons of contaminated cooling water was put into the tankfrom Feb. 1 to March 2, filling it to capacity.

    Workers began to transfer contaminated water from the leakyunderground storage tank to a different tank early on April 6. It takesabout an hour totransfer about 100 tons of water, meaning five days ormore are required to complete the task.

    The water had initially been used to cool melted nuclear fuel after theonset of the Fukushima nuclear disaster in March 2011, and wassubsequently put into the storage tank.

    TEPCO has been removing cesium from the water with filtrationequipment. However, water that goes through the filtration process and isstored in the underground storage tank is still highly contaminated

    because it contains other radioactive materials, such as strontium. Theradioactivity level of the water is about 290,000 becquerels per cubiccentimeter.

    TEPCO became aware of the leak after measuring the height of the waterin the tank on April 4 and 5.

    The underground storage tank is 60 meters long, 53 meters wide and 6meters deep. It is lined with three layers of protective sheets--two made ofpolyethylene and the outermost layer of clay--to prevent leakage.

    TEPCO had been checking for possible leaks by measuring radioactivitylevels of water from a hole dug near the tank. Until last month, however,the radioactivity level of the water had been so low that it was impossibleto detect any leakage.

    But on April 3, 20 becquerels of radioactivity per cubic centimeter wasdetected, followed by 35 becquerels the next day.

    At 3 p.m. on April 5, workers took water from an area between the claylayer and a polyethylene layer. At 10 p.m. they found that theradioactivity level of the water was about 6,000 becquerels.

    TEPCO suspects that joints in the sheets of the polyethylene layer hadruptured and the water then managed to leak through the 6.4-millimeter-

    By SHUNSUKE KIMURA/ Staff Writer

    TEPCO spokesman Masayuki Ono tells reporters on April 6 in Tokyo how

    contaminated water leaked from a storage tank at the Fukushima No. 1 nuclear

    plant. (Hikaru Uchida)

    Map Satellite

    Map data 2013 Google, ZENRIN - Terms of Use

    converted by Web2PDFConvert.com

    http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304060038http://asia.si.edu/exhibitions/current/pulverer.asphttp://asia.si.edu/exhibitions/current/pulverer.asphttp://asia.si.edu/exhibitions/current/pulverer.asphttp://asia.si.edu/exhibitions/current/pulverer.asphttp://asia.si.edu/exhibitions/current/pulverer.asphttp://asia.si.edu/exhibitions/current/pulverer.asphttp://asia.si.edu/exhibitions/current/pulverer.asphttp://asia.si.edu/exhibitions/current/pulverer.asphttp://ajw.asahi.com/article/0311disaster/fukushima/AJ201304060040http://asahikorean.com/http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304060040http://asahikorean.com/http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304070030http://asahikorean.com/http://ajw.asahi.com/category/0311disaster/fukushima/http://asahikorean.com/http://ajw.asahi.com/category/0311disaster/life_and_death/http://asahikorean.com/http://ajw.asahi.com/category/0311disaster/quake_tsunami/http://asahikorean.com/http://ajw.asahi.com/category/0311disaster/recovery/http://asahikorean.com/http://ajw.asahi.com/category/0311disaster/analysis/http://asahikorean.com/http://ajw.asahi.com/category/0311disaster/opinion/http://asahikorean.com/http://ajw.asahi.com/category/behind_news/http://asahichinese.com/http://ajw.asahi.com/category/economy/http://asahichinese.com/http://ajw.asahi.com/category/cool_japan/http://asahichinese.com/http://ajw.asahi.com/category/views/http://asahichinese.com/http://ajw.asahi.com/category/asia/http://asahichinese.com/http://ajw.asahi.com/category/sports/http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304060038http://www.web2pdfconvert.com/?ref=PDFhttp://www.web2pdfconvert.com/?ref=PDFhttp://asia.si.edu/exhibitions/current/pulverer.asphttp://www.google.com/intl/en_US/help/terms_maps.htmlhttp://ajw.asahi.com/article/0311disaster/fukushima/AJ201304070030http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304060040http://ajw.asahi.com/category/0311disaster/opinion/http://ajw.asahi.com/category/0311disaster/analysis/http://ajw.asahi.com/category/0311disaster/recovery/http://ajw.asahi.com/category/0311disaster/quake_tsunami/http://ajw.asahi.com/category/0311disaster/life_and_death/http://ajw.asahi.com/category/0311disaster/fukushima/http://ajw.asahi.com/whatsnewhttp://ajw.asahi.com/category/travel/http://ajw.asahi.com/category/forum/http://ajw.asahi.com/category/special/http://ajw.asahi.com/category/globe/http://ajw.asahi.com/category/0311disaster/http://ajw.asahi.com/category/sports/http://ajw.asahi.com/category/asia/http://ajw.asahi.com/category/views/http://ajw.asahi.com/category/cool_japan/http://ajw.asahi.com/category/economy/http://ajw.asahi.com/category/behind_news/http://twitter.com/#!/ajwasahihttp://www.facebook.com/AJW.Asahihttp://ajw.asahi.com/loginhttp://ajw.asahi.com/registerhttp://ajw.asahi.com/http://asahikorean.com/http://asahichinese.com/http://www.asahi.com/
  • 7/28/2019 Tons of Contaminated Water Leaks at Fukushima Nuclear Plant

    2/3

    More AJW

    Facebook Twitter

    iPhone/iPad

    Tweet 23 Recommend 15 3

    TEPCO floundering in dealing with sea ofcontaminated waterApril 07, 2013

    The recent leaking of radioactiv e water from a storage

    tank at the Fukushima No. 1 nuclear plant--and the

    suspected leak from a second tank--illustrate the plantoperators challenge in safely disposing of increasing amounts of

    contaminated water, with no effective solution in sight.

    Tweet 15 Recommend 24 2

    Fishermen alarmed by water leak atnuclear plantApril 07, 2013

    News of the leak of contaminated water from a storage

    tank at the Fukushima No. 1 nuclear power plant is the

    latest blow to local fishermen who had hoped to restart

    their livelihoods.

    Tweet 14 Recommend 6 2

    Anti-rat work caused latest cooling systemproblem at Fukushima nuclear plantApril 06, 201 3

    Work to prevent rodents from causing another blackout at

    the stricken Fukushima No. 1 nuclear plant accidentally

    shut down the cooling system for a spent fuel storage pool

    on April 5, the plant's operator said.

    Tweet 20 Recommend 87 2

    Fukushima nuclear plant's cooling system

    goes offline for 3 hoursApril 05, 2013The cooling system for a fuel storage pool for one of the

    reactors at the crippled Fukushima No. 1 nuclear power

    plant in Japan temporarily failed on April 5 for the second

    time in a month.

    Tweet 10 Recommend 6 2

    TEPCO makes room to store spent nuclearfuel from damaged Fukushima reactor

    buildingApril 05, 2013

    Workers at Tokyo Electric Power Co. removed spent

    nuclear fuel housed in a common storage pool at theFukushima power plant and moved it to a temporary storage depot on the

    plant site, TEPCO said April 4.

    Related Articles

    By SHUNSUKE KIMURA/ S taffWriter

    thick clay layer.

    TEPCO Fukushima No. 1 nuclear power plant contaminated water

    leakage

    1

    Tweet 41 Recommend 64

    8 ShareShare

    Facebook social plugin

    Add a comment. ..

    converted by Web2PDFConvert.com

    http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304060038http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304060038http://www.web2pdfconvert.com/?ref=PDFhttp://www.web2pdfconvert.com/?ref=PDFhttp://ajw.asahi.com/article/0311disaster/fukushima/AJ201304050062http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304050062http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304050069http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304050069http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304060040http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304060040http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304070030http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304070030http://ajw.asahi.com/article/0311disaster/fukushima/AJ201304