Michele Kearney's Nuclear Wire: FEPC Update to Information Sheet Regarding the Tohoku Earthquake

Tuesday, March 22, 2011

Update to Information Sheet Regarding the Tohoku Earthquake

The Federation of Electric Power Companies of Japan (FEPC) Washington DC Office

As of 10:00AM (EST), March 22, 2011

At 2:30PM (JST) on March 21, it was announced that radioactive nuclides have been detected from the sampling of seawater near the seawater discharge point of Unit 1 to 4 (south side). The details of radioactive nuclides, concentration, and the maximum permissible water concentration set by the government are as follows:

Radioactive Nuclides	Concentration (Bq/cm³)	Maximum Permissible Water Concentration (Bq/cm³)
Co-58	5.955 x 10^-2	1 x 10⁰
I-131	5.066 x 10⁰	4 x 10^-2
I-132	2.136 x 10⁰	3 x 10⁰
Cs-134	1.486 x 10⁰	6 x 10^-2
Cs-138	2.132 x 10^-1	3 x 10^-1
Cs-137	1.484 x 10⁰	9 x 10^-2

At 03:30PM on March 22, radiation level at main gate (approximately 3,281 feet from Unit 2 reactor building) of Fukushima Daiichi Nuclear Power Station: 277.5 micro Sv/hour.
Measurement results of environmental radioactivity level around Fukushima Nuclear Power Station announced at 7:00PM on March 22 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.

At 11:20AM on March 22, pressure inside the reactor core: 0.227MPa.
At 11:20AM on March 22, water level inside the reactor core: 1.8 meters below the top of the fuel rods.
At 11:20AM on March 22, pressure inside the primary containment vessel: 0.175MPaabs.
As of 6:00PM on March 22, the injection of seawater into the reactor core continues.
As of 4:00PM on March 22, external power generation is connected through Unit 2 and the functionality of the electric devices is being checked.

At 11:20AM on March 22, pressure inside the reactor core: -0.018MPa.
At 11:20AM on March 22, water level inside the reactor core: 1.35 meters below the top of the fuel rods.
At 11:20AM on March 22, pressure inside the primary containment vessel: 0.11MPaabs.
At 11:20AM on March 22, the temperature of the spent fuel pool: 127.4 degrees Fahrenheit.
As of 4:00PM on March 22, roughly 40 tons of water in total has been injected into the spent fuel storage pool.
As of 4:00PM on March 22, external power generation is connected and the functionality of the electric devices is being checked.
As of 6:00PM on March 22, the injection of seawater into the reactor core continues.

At 10:35AM on March 22, pressure inside the reactor core: -0.101MPa.
At 10:35AM on March 22, water level inside the reactor core: 1.575 meters below the top of the fuel rods.
At 10:35AM on March 22, pressure inside the primary containment vessel: 0.100MPaabs.
At 2:10PM on March 22, the Tokyo Fire Department began to shoot water aimed at the spent fuel pool.
As of 4:00PM on March 22, roughly 3,742 tons of water in total has been shot to the spent fuel storage pool.
As of 4:00PM on March 22, external power generation is connected through Unit 4 and the functionality of the electric devices is being checked.
As of 6:00PM on March 22, the injection of seawater into the reactor core continues.

As of 4:00PM on March 22, roughly 255 tons of water in total has been shot to the spent fuel storage pool.
As of 4:00PM on March 22, external power generation is connected and the functionality of the electric devices is being checked.

At 11:00AM on March 22, the temperature of the spent fuel pool: 99.5 degrees Fahrenheit.
As of 4:00PM on March 22, external power generation is connected and the power supply has been switched from Diesel Generator.

At 11:00AM on March 22, the temperature of the spent fuel pool: 77 degrees Fahrenheit.
As of 4:00PM on March 22, external power generation is connected and the functionality of the electric devices is being checked (Spent fuel pool is being cooled by the power supplied from Diesel Generator of Unit 6).

At 4:30PM on March 21, the temperature of the spent fuel pool: 141.8 degrees Fahrenheit.

From: Taro Ishida [ishida@denjiren.com]
Sent: 03/22/2011 10:32 AM AST
To: Taro Ishida <ishida@denjiren.com>
Cc: Samuel Lederer <lederer@denjiren.com>
Subject:

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-9 sent at 11:03PM on 3/21.

For your reference, JAIF (Japan Atomic Industrial Forum) has been posting the translation of news reports on their website.

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: