Michele Kearney's Nuclear Wire: FEPC Update to Information Sheet Regarding the Tohoku Earthquake 3/28

Monday, March 28, 2011

Update to Information Sheet Regarding the Tohoku Earthquake

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

As of 12:30PM (EST), March 28, 2011

At 6:00PM (JST) on March 28, radiation level at main gate (approximately 3,281 feet from Unit 2 reactor building) of Fukushima Daiichi Nuclear Power Station: 186 micro Sv/hour.
At 6:00PM on March 28, radiation level at west gate (approximately 3,609 feet from Unit 2 reactor building) of Fukushima Daiichi Nuclear Power Station: 121.6 micro Sv/hour.
As of 7:00PM on March 28, the results of the radioactive nuclides detected from the sample of waterhole at the turbine building of each unit of Fukushima Daiichi are as follows:

	Unit 1	Unit 2	Unit 3	Unit 4
Date of Samples taken	March 26	March 26	March 26	March 26
Radiation Level on the Surface	60 milli Sv/hour	more than 1,000 milli Sv/hour	750 milli Sv/hour	0.50 milli Sv/hour
Nuclides (half-life)	Concentration (Unit : Bq/cm³)
I-131 (8 days)	1.5 x 10⁵	1.3 x 10⁷	3.2 x 10⁵	3.6 x 10²
I-132 (2 hours)	UDL	UDL	UDL	1.3 x 10¹
I-134 (53 minutes)	UDL	UDL	UDL	UDL
Cs-134 (2 years)	1.2 x 10⁵	2.3 x 10⁵	5.5 x 10⁴	3.1 x 10¹
Cs-136 (13 days)	1.1 x 10⁴	2.5 x 10⁵	6.5 x 10³	3.7 x 10⁰
Cs-137 (30 years)	1.3 x 10⁵	2.3 x 10⁶	5.6 x 10⁴	3.2 x 10¹

UDL: under the detection limit

Measurement results of environmental radioactivity level around Fukushima Nuclear Power Station announced at 7:00PM on March 28 are shown in the attached PDF file. English version is available at: http://www.mext.go.jp/english/radioactivity_level/detail/1304082.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 2:30PM on March 26, it was announced that radioactive nuclide I-131 was detected from the sampling of seawater near the seawater discharge point The level of concentration was approximately 1,850 times higher than the maximum permissible water concentration set by the government and it was approximately 1.5 times higher than the previous day’s figure.
As of 3:10PM on March 27, recovery and transfer work of the waterhole at the turbine building to the condenser by using three pumps was underway.
At 3:30PM on March 27, it was announced that 0.4milli (400,000 micro) Sv/hour was detected on the surface of the waterhole at the trench (concrete tunnel in which the pipes are laid down) outside turbine building.
At 12:30PM on March 28, pressure inside the reactor core: 0.376MPa.
At 12:30PM on March 28, water level inside the reactor core: 1.75 meters below the top of the fuel rods.
At 12:30PM on March 28, pressure inside the primary containment vessel: 0.270MPaabs.

At 10:10AM on March26, injection of freshwater in place of seawater into the reactor core started.
At 4:46PM on March 26, lighting was restored in the Central Control Room.
As of 7:30AM on March 27, transfer work of the waterhole at the turbine building to the condenser was under preparation.
At 3:30PM on March 27, it was announced that more than 1,000 milli (1,000,000 micro) Sv/hour was detected on the surface of the waterhole at the trench outside turbine building.
At 12:30PM on March 28, the temperature of the spent fuel pool: 121.1 degrees Fahrenheit.
At 12:30PM on March 28, pressure inside the reactor core: -0.032MPa.
At 12:30PM on March 28, water level inside the reactor core: 1.5 meters below the top of the fuel rods.
At 12:30PM on March 28, pressure inside the primary containment vessel: 0.1MPaabs.
As of 3:00PM on March 28, the injection of freshwater into the reactor core continues.
As of 7:00PM on March 28, approximately 96 tons of water in total has been injected into the spent fuel storage pool.

As of 7:30AM on March 27, transfer work of the waterhole at the turbine building to the condenser was under consideration.
At 12:34PM on March 27, TEPCO began to shoot water aimed at the spent fuel pool, with a specialized vehicle normally used for pumping concrete, until 2:36PM (approximately 100 tons in total).
At 3:30PM on March 27, it was announced that the waterhole was found at the trench outside turbine building, but TEPCO couldn’t measure the radiation level on the surface due to rubbles.
At 10:30AM on March 28, pressure inside the reactor core: 0.025MPa.
At 10:30AM on March 28, water level inside the reactor core: 1.85 meters below the top of the fuel rods.
At 10:30AM on March 28, pressure inside the primary containment vessel: 0.1076MPaabs.
As of 7:00PM on March 28, approximately 4,597 tons of water in total has been shot to the spent fuel storage pool.

At 4:55PM on March 27, TEPCO began to shoot water aimed at the spent fuel pool, with a specialized vehicle normally used for pumping concrete, until 7:25PM (approximately 125 tons in total).
As of 7:30AM on March 27, transfer work of the waterhole at the turbine building to the condenser was under consideration.
As of 7:00PM on March 28, approximately 960 tons of water in total has been shot to the spent fuel storage pool.
As of 7:00PM on March 28, external power generation is connected and the functionality of the electric devices is being checked.

At 2:00PM on March 28, the temperature of the spent fuel pool: 87.6 degrees Fahrenheit.

At 2:00PM on March 28, the temperature of the spent fuel pool: 86.9 degrees Fahrenheit.

At 8:00AM on March 27, the temperature of the spent fuel pool: 102.2 degrees Fahrenheit.
As of 7:00PM on March 28, approximately 130 tons of water in total has been injected to the spent fuel storage pool.

From: Taro Ishida [ishida@denjiren.com]
Sent: 03/28/2011 12:28 PM 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-13 sent at 11:24AM on 3/25.

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: