FEPC Update to Information Sheet Regarding the Tohoku Earthquake 6/10

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-48 on 6/10.

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.

Update to Information Sheet Regarding the Tohoku Earthquake

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

As of June 16, 2011

All times listed below are Japan Standard Time (JST) unless otherwise noted.

• Major Activities
• On June 10, TEPCO announced the status of improvement measures for the working environment at Fukushima Daiichi. The improvement measures include establishing rest areas, installing additional water stations, introducing cool vest, and improvements to accommodation facilities. The details are available at:

http://www.tepco.co.jp/en/press/corp-com/release/11061013-e.html

• On June 11, TEPCO began operating air circulators which have been installed at the turbine building of Unit 2 in order to reduce the radioactive concentration of the reactor building as with Unit 1.
• On June 13, TEPCO began to operate a seawater purification system installed at the seawater intake area of Unit 2 and 3.
• On June 14, TEPCO announced the outline of its plan to install a cover over the reactor building of Unit 1. The cover has a steel frame structure and polyester fiber fabric sheets coated with vinyl chloride. The details are available at:

http://www.tepco.co.jp/en/press/corp-com/release/11061415-e.html

• On June 14, TEPCO began a test operation of the cesium absorption unit of the water treatment facility.
• On June 15, TEPCO began a test operation of the decontamination unit of water treatment facility. Then TEPCO began a combined operation test of the cesium absorption and the decontamination unit.
• On June 15, TEPCO submitted a report to the Nuclear and Industry Safety Agency (NISA) regarding the installation of a circulating cooling system at the spent fuel pool of Unit 3 to remove decay heat continuously in order to maintain the water level and ensure the cooling of water in the pool as with Unit 2. TEPCO plans to complete the installation of the system by the end of June.
• On June 16, TEPCO began a continuous operation test of the overall water treatment facility.
• Other countermeasures such as injecting water into reactor cores, injecting Nitrogen gas into primary containment vessels, shooting water aimed at spent fuel pools, transferring accumulated water, and dispersing dust inhibitor over the ground continue to be implemented.

• Radiation Levels
• On June 13, TEPCO announced that an additional six workers at Fukushima Daiichi are likely to have been exposed to the radiation levels exceeding the upper limit of radiation dosage of 250mSv as set by the Government of Japan. Details are available at:

http://www.tepco.co.jp/en/press/corp-com/release/betu11_e/images/110613e11.pdf

• The concentration of radioactive nuclides from the groundwater sampled at sub-drain pits at Unit 1 to 6 of Fukushima Daiichi Nuclear Power Station were as follows:

	Unit 1	Unit 2	Unit 3	Unit 4	Unit 5	Unit 6
Samples taken at	6/15 11:48AM	6/15 11:45AM	6/15 11:41AM	6/15 11:42AM	6/15 11:27AM	6/15 11:19AM
Nuclides (half-life)	Concentration (Unit : Bq/cm3)
I-131 (8 days)	Not Detectable	8.2 x 10-1	Not Detectable	Not Detectable	Not Detectable	Not Detectable
Cs-134 (2 years)	3.7 x 100	1.1 x 101	8.4 x 10-2	2.9 x 10-2	6.8 x 10-3	1.4 x 10-2
Cs-137 (30 years)	4.6 x 100	1.3 x 101	8.6 x 10-2	Not Detectable	8.2 x 10-3	1.6 x 10-2

• The concentration of radioactive nuclides from the seawater sampled at the screen device (installed to remove waste before the intake of seawater) of Unit 2 and sampled near the seawater discharge point (south side) of Fukushima Daiichi Nuclear Station were as follows:

Nuclides (half-life)	Concentration (Unit : Bq/cm3)				Ratio
	Sampled inside the silt  fence at the screen of Unit 2	Sampled outside the silt fence at the screen of Unit 2	Sampled at south side discharge point	Maximum Permissible Water Concentration (d)	a / d	b / d	c / d
	6/15 8:09AM   (a)	6/15 8:05AM (b)	6/15 1:00PM (c)
I-131 (8 days)	2.0 x 100	7.6 x 10-2	Not Detectable	4.0 x 10-2	50	1.9	-
Cs-134 (2 years)	1.4 x 100	1.5 x 10-1	2.9 x 10-2	6.0 x 10-2	23	2.5	0.48
Cs-137 (30 years)	1.5 x 100	1.4 x 10-1	2.7 x 10-2	9.0 x 10-2	17	1.6	0.30

• At 9:00PM on June 16, radiation level at west gate (approximately 3,609 feet from Unit 2 reactor building) of Fukushima Daiichi Nuclear Power Station: 14.0 micro Sv/hour. Other monitoring data at the site are available at:

http://www.tepco.co.jp/en/nu/fukushima-np/f1/index-e.html

• Measurement results of environmental radioactivity level around Fukushima Nuclear Power Station announced at 6:00PM on June 16 are shown in the attached PDF file. Previous data are available at:    http://www.mext.go.jp/english/incident/1304082.htm

• Plant Parameters (As of 6:00AM on June 16)

http://www.tepco.co.jp/en/nu/fukushima-np/f1/images/11061606_table_summary-e.pdf

• Plant Status (As of June 14)

http://www.tepco.co.jp/en/nu/fukushima-np/f1/images/f12np-gaiyou_e_2.pdf

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)
• Ministry of Defense (MOD)

++++++++++++++++++++++++++++++++

Taro Ishida

The Federation of Electric Power Companies of Japan
1901 L Street, NW Suite 600
Washington, DC 20036

Mobile (202) 253-2579

Phone (202) 530-0769 (Direct)
Phone (202) 466-6781
Fax (202) 466-6758

email: ishida@denjiren.com