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Monitoring by sampling

Result of Radioactive Analysis around Fukushima Daiichi Nuclear Power Station

Results of radioactive nuclide analysis are published for the sample for below items in the power station and its surrounding area.
* During weekends and national holidays, updates will be provided in Japanese only.

The recent data is here.

Prompt Report of Result of Analysis (July, 2014)

in the Air at the Site of Power Station

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Result of radioactive nuclide analysis for the air sampled in the power station.

Seawater near Power Station

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Result of radioactive nuclide analysis for the seawater sampled on and offshore of the power station.

* In the report announced on July 30, 2014, we posted the revised version of the previous reports, in which the detection limit value of the samples analyzed at hot laboratory in Units 5 and 6 has been corrected.

in Seawater taken near Intake Canal of Power Station

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Result of radioactive nuclide analysis for the seawater sampled at near the intake canal of unit 1 to 4 of the power station.

* In the report announced on July 30, 2014, we posted the revised version of the previous reports, in which the detection limit value of the samples analyzed at hot laboratory in Units 5 and 6 has been corrected.

Subsurface Water near the Turbine Buildings

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Result of radioactive nuclide analysis for the water sampled from the sub drain around turbine buildings of unit 1 to 6.

* In the report announced on July 30, 2014, we posted the revised version of the previous reports, in which the detection limit value of the samples analyzed at hot laboratory in Units 5 and 6 has been corrected.

Sub-drain Water in the Surroundings of Centralized Radiation Waste Treatment Facility

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Result of radioactive nuclide analysis for the water sampled from the sub drain around centralized waste treatment facility.

Monitoring at the East Side of Unit 1-4 Turbine Buildings

July 31, 2014 Detailed Analysis Results in the Port of Fukushima Daiichi NPS, around Discharge Channel and Bank Protection (2)
July 31, 2014 Detailed Analysis Results in the Port of Fukushima Daiichi NPS, around Discharge Channel and Bank Protection
July 30, 2014 Detailed Analysis Results in the Port of Fukushima Daiichi NPS, around Discharge Channel and Bank Protection

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Results of radioactive nuclide analysis are published for the samples of groundwater at the east side of Unit 1-4 Turbine Buildings and seawater at the port in order to monitor the source and the extent of the radioactive materials in the groundwater, and whether the materials included in groundwater affect the sea.

Monitoring Regarding the Water Leak at Tank (South Water Outlet, Drainage Channel)

July 31, 2014 Sampling Results Regarding the Water Leak at the Tanks in the H4 area in Fukushima Daiichi Nuclear Power Station (South Water Outlet, Drainage Channel)
July 30, 2014 Sampling Results Regarding the Water Leak at the Tanks in the H4 area in Fukushima Daiichi Nuclear Power Station (South Water Outlet, Drainage Channel)
July 29, 2014 Sampling Results Regarding the Water Leak at the Tanks in the H4 area in Fukushima Daiichi Nuclear Power Station (South Water Outlet, Drainage Channel)

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Monitoring Regarding the Water Leak at Tank (Observation Hole around the H4 Area)

July 31, 2014 Sampling Results Regarding the Influence on the Water Leak at a Tank in the H4 area in Fukushima Daiichi Nuclear Power Station (Around the H4 Area)
July 30, 2014 Sampling Results Regarding the Influence on the Water Leak at a Tank in the H4 area in Fukushima Daiichi Nuclear Power Station (Around the H4 Area)
July 29, 2014 Sampling Results Regarding the Influence on the Water Leak at a Tank in the H4 area in Fukushima Daiichi Nuclear Power Station (Around the H4 Area)

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Investigation of Impact on the Groundwater Bypass Regarding the Water Leak at Tank (Pump Well)

July 30, 2014 Sampling Results of Pump Wells of the Groundwater Bypass at Fukushima Daiichi Nuclear Power Station
July 29, 2014 Sampling Result of Pump Well No.12 of the Groundwater Bypass at Fukushima Daiichi NPS
July 26, 2014 Sampling Results of Pump Wells of the Groundwater Bypass at Fukushima Daiichi Nuclear Power Station

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Monitoring Regarding the Water Leak at Tank (Observation Hole around the H6 Area)

July 31, 2014 Sampling Results Regarding the Influence on the Water Leak at a Tank in the H6 area in Fukushima Daiichi Nuclear Power Station (Around the H6 Area)
July 30, 2014 Sampling Results Regarding the Influence on the Water Leak at a Tank in the H6 area in Fukushima Daiichi Nuclear Power Station (Around the H6 Area)
July 29, 2014 Sampling Results Regarding the Influence on the Water Leak at a Tank in the H6 area in Fukushima Daiichi Nuclear Power Station (Around the H6 Area)

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Analysis Results of Rainwater Obtained Inside the Dike at the Tank Area After Treated by the Rainwater Treatment System

July 31, 2014 Analysis Results of Rainwater Obtained Inside the Dike at the Tank Area After Treated by the Rainwater Treatment System (2)
July 31, 2014 Analysis Results of Rainwater Obtained Inside the Dike at the Tank Area After Treated by the Rainwater Treatment System
July 26, 2014 Analysis Results of Rainwater Obtained Inside the Dike at the Tank Area After Treated by the Rainwater Treatment System

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Detailed Analysis Results of Groundwater Obtained around Unit 1 to 4

The newest data is on June 23, 2014.

Radioactive material was detected from the accumulated water inside the pit as a result of purification test at a well (sub-drain pit), which is adjacent to Unit 1-4 Buildings at Fukushima Daiichi Nuclear Power Station. Since there is a possibility that the water was affected by fallout, we installed new observation well around Unit 1-4 Buildings in order to assess the impact of fallout.

Nuclide Analysis Results of the Underground Reservoirs

July 31, 2014 Underground Reservoir Tritium Analysis Results (As of July 23)
July 31, 2014 Underground Reservoir Nuclide Analysis Results (As of July 30)
July 30, 2014 Tritium Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of July 21 and 22)

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Other

July 28, 2014 Sampling Results Regarding the Discharge of Groundwater Bypass at Fukushima Daiichi Nuclear Power Station (Around South Water Outlet)
July 25, 2014 Nuclide Analysis of the Radioactive Materials in the Fallouts obtained inside and outside of Fukushima Daiichi Nuclear Power Station
July 23, 2014 in the ocean soil off the coast (Dry Soil Rate : June 2014)
July 16, 2014 Sampling Results Regarding the Discharge of Groundwater Bypass at Fukushima Daiichi Nuclear Power Station (Around South Water Outlet)Seawater collected in offshore area of Miyagi Prefecture
July 10, 2014 Sampling Results Regarding the Discharge of Groundwater Bypass at Fukushima Daiichi Nuclear Power Station (Around South Water Outlet)
July 4, 2014 Sampling Results Regarding the Discharge of Groundwater Bypass at Fukushima Daiichi Nuclear Power Station (Around South Water Outlet)
July 2, 2014 in the soil in the ocean soil off the coast
July 1, 2014 in the ocean soil off the coast Analysis results of temporary storage tanks for groundwater bypass at Fukushima Daiichi Nuclear Power Station

Confirmed Results of Analysis

Analysis results of the major 3 nuclides (I-131, Cs-134, Cs-137) are being announced as flash report on a daily basis.
With regard to reevaluation of the major 3 nuclides and analysis results of γ nuclides except for the major 3 nuclides are being announced as definite report.

July 18, 2014 For updated from June 16 to June 30
July 9, 2014 For updated from June 1 to June 15

Seawater taken from Unit 1 to 4 side of South Discharge Channel (July, 2014)

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Nuclide analysis is in operation on the radioactive materials in the water sampled near the South Discharge Channel (approximately 330m south of Unit 1-4 side of the South Discharge Channel) in response to the leaked water from the pipeline connecting from Desalination System (Reverse Osmosis Membrane) to Concentrated Water Storage Tank (occurred on March 26 and April 5, 2012).

* The sampling location has been changed on November 26, 2012. (Sampling is performed at approx. 1km south of the previous location.)

Analysis Results of Water at Water Treatment Facility

The newest data is on May 30, 2014.

Analysis Results of Fish and Shellfish(The Ocean Area Within 20km Radius of Fukushima Daiichi NPS)

July 18, 2014 Nuclide Analysis Results of Fish and Shellfish (The Ocean Area Within 20km Radius of Fukushima Daiichi NPS)(excl. inner port area)

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