Update to Information Sheet Regarding the Tohoku Earthquake
Source: The Federation of Electric Power Companies of Japan (FEPC) Washington DC Office As of 11:00AM (EST), April 1, 2011
·
Radiation Levels
o At 7:00PM (JST) on April 1, radiation level at main gate (approximately 3,281 feet from Unit 2 reactor building) of Fukushima Daiichi Nuclear Power Station: 141 micro Sv/hour.
o At 7:00PM on April 1, radiation level at west gate (approximately 3,609 feet from Unit 2 reactor building) of Fukushima Daiichi Nuclear Power Station: 90.0 micro Sv/hour.
o Measurement results of environmental radioactivity level around Fukushima Nuclear Power Station announced at 7:00PM on April 1 are shown in the English version is available at: http://www.mext.go.jp/english/radioactivity_level/detail/1304082.htm
o 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
o At 10:00AM on April 1, pressure inside the reactor core: 0.295MPa.
o At 10:00AM on April 1, water level inside the reactor core: 1.65 meters below the top of the fuel rods.
o At 10:00AM on April 1, pressure inside the primary containment vessel: 0.165MPaabs.
o At 10:00AM on April 1, the temperature of the reactor vessel measured at the water supply nozzle: 479.5 degrees Fahrenheit.
o As of 3:30PM on April 1, the injection of freshwater into the reactor core continues.
o As of 7:00PM on April 1, preparation to recover and transfer the accumulated water at the turbine building continues.
o As of 7:00PM on April 1, approximately 90 tons of water in total has been injected into the spent fuel storage pool.
· Fukushima Daiichi Unit 2 reactor
o At 10:00AM on April 1, the temperature of the spent fuel pool: 122 degrees Fahrenheit.
o At 10:00AM on April 1, pressure inside the reactor core: -0.007MPa.
o At 10:00AM on April 1, water level inside the reactor core: 1.5 meters below the top of the fuel rods.
o At 10:00AM on April 1, pressure inside the primary containment vessel: 0.11MPaabs.
o As of 3:30PM on April 1, the injection of freshwater into the reactor core continues.
o As of 7:00PM on April 1, preparation to recover and transfer the accumulated water at the turbine building continues.
· Fukushima Daiichi Unit 3 reactor
o At 4:30PM on March 31, TEPCO began to shoot freshwater aimed at the spent fuel pool, with a specialized vehicle normally used for pumping concrete, until 7:33PM (approximately 105 tons in total).
o At 11:45AM on April 1, pressure inside the reactor core: 0.016MPa.
o At 11:45AM on April 1, water level inside the reactor core: 1.9 meters below the top of the fuel rods.
o At 11:45AM on April 1, pressure inside the primary containment vessel: 0.1068MPaabs.
o As of 3:30PM on April 1, the injection of freshwater into the reactor core continues.
o As of 7:00PM on April 1, preparation to recover and transfer the accumulated water at the turbine building continues.
o As of 7:00PM on April 1, approximately 4,802 tons of water in total has been shot into the spent fuel storage pool.
· Fukushima Daiichi Unit 4 reactor
o At 8:28AM on April 1, TEPCO began to shoot freshwater aimed at the spent fuel pool, with a specialized vehicle normally used for pumping concrete, until 2:14PM (approximately 180 tons in total).
o As of 7:00PM on April 1, approximately 1,278 tons of water in total has been shot into the spent fuel storage pool.
· Fukushima Daiichi Unit 5 reactor
o At 2:00PM on April 1, the temperature of the spent fuel pool: 100.6 degrees Fahrenheit.
· Fukushima Daiichi Unit 6 reactor
o At 2:00PM on April 1, the temperature of the spent fuel pool: 69.8 degrees Fahrenheit.
· Fukushima Daiichi Common Spent Fuel Pool
o At 7:30AM on April 1, the temperature of the spent fuel pool: 89.6 degrees Fahrenheit.
· Others
o At 3:42PM on March 31, a US Military barge carrying freshwater docked at the dedicated port at Fukushima Daiichi Nuclear Power Station, towed by a vessel of Marine Self Defense Forces.
o At 3:00PM on April 1, anti-scattering agent was dispersed on a trial basis around the Fukushima Daiichi Common Spent Fuel Pool.
o At 3:58PM on April 1, transferring the freshwater from the US Military barge to a filtrate tank commenced.
Communications & Contact Information
· From: Taro Ishida [ishida@denjiren.com]
Sent: 04/01/2011 11:43 AM AST
To: Taro Ishida <ishida@denjiren.com>
Cc: Samuel Lederer <lederer@denjiren.com>
Subject: <Update-18> Information Sheet Regarding the Tohoku Earthquake (from FEPC Washington Office)
Dear Friends,
Please find the updated information sheet below and attached that summarizes the events from Update-17 at 11:00AM on 3/31.
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)
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