Michele Kearney's Nuclear Wire

Major Energy and Environmental News and Commentary affecting the Nuclear Industry.

Thursday, March 24, 2011

FEPC Update to Information Sheet Regarding the Tohoku Earthquake 3/24

Update to Information Sheet Regarding the Tohoku Earthquake
The Federation of Electric Power Companies of Japan (FEPC) Washington DC Office
As of 11:00AM (EST), March 24, 2011
  • Radiation Levels
    • At 6:30PM (JST) on March 24, radiation level at main gate (approximately 3,281 feet from Unit 2 reactor building) of Fukushima Daiichi Nuclear Power Station: 204.5 micro Sv/hour.
    • Measurement results of environmental radioactivity level around Fukushima Nuclear Power Station announced at 7:00PM on March 24 are shown in the attached PDF file. English version is available at:    http://www.mext.go.jp/english/radioactivity_level/detail/1303962.htm
    • For comparison, a human receives 2,400 micro Sv per year from natural radiation in the form of sunlight, radon, and other sources. One chest CT scan generates 6,900 micro Sv per scan.
  • Fukushima Daiichi Unit 1 reactor
    • At 10:50AM on March 24, hazy white steam was emitted from the top of the second containment building.
    • At 11:30AM on March 24, lighting was restored in the Central Control Room.
    • At 1:00PM on March 24, pressure inside the reactor core: 0.423MPa.
    • At 1:00PM on March 24, water level inside the reactor core: 1.7 meters below the top of the fuel rods.
    • At 1:00PM on March 24, pressure inside the primary containment vessel: 0.39MPaabs.
    • As of 7:30PM on March 24, the injection of seawater into the reactor core continues.
  • Fukushima Daiichi Unit 2 reactor
    • At 1:00PM on March 24, pressure inside the reactor core: -0.023MPa.
    • At 1:00PM on March 24, water level inside the reactor core: 1.15 meters below the top of the fuel rods.
    • At 1:00PM on March 24, pressure inside the primary containment vessel: 0.11MPaabs.
    • At 1:00PM on March 24, the temperature of the spent fuel pool: 113 degrees Fahrenheit.
    • As of 6:00PM on March 24, approximately 58 tons of water in total has been injected into the spent fuel storage pool. 
    • As of 6:00PM on March 24, external power generation is connected and the functionality of the electric devices is being checked.
    • As of 7:30PM on March 24, the injection of seawater into the reactor core continues.
  • Fukushima Daiichi Unit 3 reactor
    • At 11:30PM on March 23, it was confirmed that the emission of black smoke had ceased (confirmed again at 4:50AM on March 24).
    • At 5:35AM on March 24, TEPCO began to inject seawater into the spent fuel pool via cooling and purification line, until at 4:05PM (approximately 120 tons in total).
    • At 10:20AM on March 24, pressure inside the reactor core: 0.036MPa.
    • At 10:20AM on March 24, water level inside the reactor core: 1.9 meters below the top of the fuel rods.
    • At 10:20AM on March 24, pressure inside the primary containment vessel: 0.107MPaabs.
    • At 2:25PM on March 24, the radiation level near the power panel of the 1st basement floor of turbine building was measured as 200 milli Sv per hour.
    • As of 6:00PM on March 24, approximately 3,927 tons of water in total has been shot to the spent fuel storage pool.
    • As of 7:30PM on March 24, the injection of seawater into the reactor core continues.
  • Fukushima Daiichi Unit 4 reactor
    • At 2:36PM on March 24, TEPCO began to shoot water aimed at the spent fuel pool, with a specialized vehicle normally used for pumping concrete, until 5:30PM (approximately 150 tons in total).
    • As of 6:00PM on March 24, approximately 685 tons of water in total has been shot to the spent fuel storage pool. 
    • As of 6:00PM on March 24, external power generation is connected and the functionality of the electric devices is being checked.
  • Fukushima Daiichi Unit 5 reactor
    • At 1:00PM on March 24, the temperature of the spent fuel pool: 117.9 degrees Fahrenheit.
    • At 1:00PM on March 24, the temperature of the water in the reactor core: 197.6 degrees Fahrenheit.
  • Fukushima Daiichi Unit 6 reactor
    • At 1:00PM on March 24, the temperature of the spent fuel pool: 80.6 degrees Fahrenheit.
  • Fukushima Daiichi Common Spent Fuel Pool
    • At 3:37PM on March 24, the external power started to be supplied.
    • As of 6:00PM on March 24, approximately 130 tons of water in total has been injected to the spent fuel storage pool.
    • As of 6:05PM on March 24, cooling of the spent fuel pool began.
    • At 6:40PM on March 24, the temperature of the spent fuel pool: 163.4 degrees Fahrenheit.

Dear Friends,
 
Please find the updated information sheet below and attached that summarizes the events from Update-11 sent at 10:17AM on 3/23.
 
For your reference, JAIF (Japan Atomic Industrial Forum) has been posting the translation of news reports on their website.
http://www.jaif.or.jp/english/
 
Please direct any questions regarding this document to me, Ishida@denjiren.com or Samuel Lederer, Researcher of FEPC at lederer@denjiren.com.


Our official sources are:
  • Office of The Prime Minister of Japan
  • Nuclear and Industrial Safety Agency (NISA)
  • Tokyo Electric Power Company (TEPCO) Press Releases
  • Ministry of Education, Culture, Sports, Science and Technology (MEXT)


Dan Yurman 
Mobile: 208-521-5726 

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