Prompt Report of Analysis Results (December, 2014)
The date colored yellow provides the latest data.
Air on the premises of Power Station
Result of radioactive nuclide analysis for the air sampled on the premises of the power station.
Seawater near Power Station
Result of radioactive nuclide analysis for the seawater sampled onshore and offshore of the power station.
Seawater near Intake Canals by Unit 1-4 side
Result of radioactive nuclide analysis for the seawater sampled near the intake canals by the side of Unit 1-4 turbine buildings.
Subdrain Water near the Turbine Buildings
Result of radioactive nuclide analysis for the water sampled from the subdrain system near Unit 1-6 turbine buildings.
Subdrain Water around Centralized Radiation Waste Treatment Facility
Result of radioactive nuclide analysis for the water sampled from the subdrain around the centralized waste treatment facility.
Leaked Water near South Discharge Cannel on Unit 1-4 side
Result of radioactive nuclide analysis for the water sampled near the South Discharge Channel (approximately 330m south of the South Discharge Channel on Unit 1-4 side) 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.)
Sampling regarding Groundwater Bypass
As a measure to prevent contaminated water from accumulating, the groundwater bypass has begun its operation since May 2014, which pumps up groundwater on the mountain side before flowing into the buildings and drains the water into the ocean after checking its purity. The pumped up groundwater is once stored in temporary storage tanks, and then its radioactive material concentration is mesured to confirm that its quality meets the operation target.
The third-party organization also analyzes the radioactive material concentration to ensure the objectivity of the analysis result.
| |
Cesium 134 |
Cesium 137 |
Gross β |
Tritium |
| Operation Target |
1Bq/l |
1Bq/l |
5Bq/l |
1500Bq/l |
| Notification Level Limit (Reference) |
60Bq/l |
90Bq/l |
30Bq/l |
60000Bq/l |
| WHO Drinking Water Guideline |
10Bq/l |
10Bq/l |
10Bq/l |
10000Bq/l |
Documents about summary, operational status, and related information of groundwater bypass are HERE.
Analysis Results of Pump Well
Analysis Results of Temporary Storage Tanks
Result of weighted average sample analysis for groundwater bypass at Fukushima Daiichi Nuclear Power Station
*The analysis of the water sampled before being discharged, which is mixed at the rate of each amount out of the whole amount of discharged water in a month.
Analysis Results Regarding Discharge
The newest data is on November 16, 2014.
Monitoring regarding Water Leakage Tanks
The sampling near the South Water Outlet, at the Drainage Channel, and around tanks in the H4 area has been continued in order to monitor the impact of several leakage accidents such as the leakage from the bottom flange of the No.5 tank in the H4 area I group happened in August, 2013, the dripping from the top plate of the B-A5 tank in the B south area happened in October, 2013, and the leakage from the top plate flange of the C1 tank in the H6 area happened in February, 2014.
South Water Outlet, Drainage Channel English form
Observation Hole around H4 Area English form
Observation Hole around H6 Area English form
Analysis Results of Rainwater sprinkling Obtained Inside the Dike in the Tank Area After Treated by the Rainwater Treatment System
The rainwater accumulated inside the dike in the tank area has been sprinkled on the premises of Fukushima Daiichi NPS since May, 2014 after being purified by the desalination system (reverse osmosis membrane) etc.
Monitoring at the East Side of Unit 1-4 Turbine Buildings
Results of radioactive nuclide analysis for groundwater at the east side of Unit 1-4 Turbine Buildings and seawater at the port in order to monitor the source, the extent, and the effect of the radioactive materials in the groundwater toward the ocean.
Detailed Analysis Results of Groundwater around Unit 1-4 Buildings
Radioactive materials were detected from the accumulated water inside the pits as a result of purification test at wells (subdrain pits), which is adjacent to Unit 1-4 Buildings at Fukushima Daiichi NPS. Since there is a possibility of being affected by fallout, we installed new observation well around Unit 1-4 Buildings in order to assess the impact of fallout.
The newest data is on October 1, 2014.
Analysis Results of Underground Reservoirs
open
The groundwater sampled from the leakage detection holes by the undergounrd reservoirs and the surrounding observation holes has been analyzed, and its impact on the surrounding environment has been monitored after the water leakage accident from the underground reservoirs happened in April, 2013.
The leak volume from the underground reservoirs was evaluated as approximatly 20～30 litters after the accident.
| December 31, 2014 |
Tritium Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of December 22 and 23) |
| December 31, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Bypass and the Sea Side Observation Holes (As of December 30) |
| December 30, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Bypass and the Sea Side Observation Holes (As of December 29) |
| December 29, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 28) |
| December 28, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 27) |
| December 27, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 26) |
| December 26, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Reservoir Observation Holes (As of December 25) |
| December 25, 2014 |
Underground Reservoir Tritium Analysis Results (As of December 17) |
| December 25, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 24) |
| December 23, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Bypass and the Sea Side Observation Holes (As of December 22) |
| December 22, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 21) |
| December 21, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 20) |
| December 20, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 19) |
| December 19, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Reservoir Observation Holes (As of December 18) |
| December 18, 2014 |
Underground Reservoir Tritium Analysis Results (As of December 10) |
| December 18, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 17) |
| December 17, 2014 |
Tritium Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of December 8 and 9) |
| December 17, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Bypass and the Sea Side Observation Holes (As of December 16) |
| December 16, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Bypass and the Sea Side Observation Holes (As of December 15) |
| December 15, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 14) |
| December 14, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 13) |
| December 13, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 12) |
| December 12, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Reservoir Observation Holes (As of December 11) |
| December 11, 2014 |
Underground Reservoir Tritium Analysis Results (As of December 3) |
| December 11, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 10) |
| December 10, 2014 |
Tritium Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of December 1 and 2) |
| December 10, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Bypass and the Sea Side Observation Holes (As of December 9) |
| December 9, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Bypass and the Sea Side Observation Holes (As of December 8) |
| December 8, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 7) |
| December 7, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 6) |
| December 6, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 5) |
| December 5, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Reservoir Observation Holes (As of December 4) |
| December 4, 2014 |
Underground Reservoir Tritium Analysis Results (As of November 26) |
| December 4, 2014 |
Underground Reservoir Nuclide Analysis Results (As of December 3) |
| December 3, 2014 |
Tritium Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of November 24 and 25) |
| December 3, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Bypass and the Sea Side Observation Holes (As of December 2) |
| December 2, 2014 |
Nuclide Analysis Results of the Underground Reservoir/Underground Bypass and the Sea Side Observation Holes (As of December 1) |
| December 1, 2014 |
Underground Reservoir Nuclide Analysis Results (As of November 30) |
Other
open
| December 27, 2014 |
Nuclides Analysis Result of Unit 1 discharge channel at Fukushima Daiichi NPS |
| December 26, 2014 |
in the soil |
| December 22, 2014 |
Seawater collected in offshore area of Ibaraki Prefecture |
| December 21, 2014 |
Nuclides Analysis Result of Unit 1 discharge channel at Fukushima Daiichi NPS |
| December 19, 2014 |
Nuclides Analysis Result of the Radioactive Materials in the Air at the Upper Part of Unit 1 Reactor Building (1st Sampling) Nuclides Analysis Result of the Radioactive Materials in the Air at the Upper Part of Unit 1 Reactor Building (2nd Sampling) Nuclides Analysis Result of the Radioactive Materials in the Air at the Exhaust Facility of Unit 2 Reactor Building Nuclides Analysis Result of the Radioactive Materials in the Air at the Upper Part of Unit 3 Reactor Building Nuclides Analysis Result of the Radioactive Materials in the Air at the Upper Part of Unit 4 Reactor Building Gas Sampling Results of Unit 1 PCV Gas Control System Conducted at Fukushima Daiichi Nuclear Power Station Gas Sampling Results of Unit 2 PCV Gas Control System Conducted at Fukushima Daiichi Nuclear Power Station Gas Sampling Results of Unit 3 PCV Gas Control System Conducted at Fukushima Daiichi Nuclear Power Station Nuclides Analysis Result of the Radioactive Materials in the Air at the Opening of Buildings at Fukushima Daiichi NPS (1) Nuclides Analysis Result of the Radioactive Materials in the Air at the Opening of Buildings at Fukushima Daiichi NPS (2) Nuclides Analysis Results of the Radioactive Materials in the Air at the Opening of Buildings at Fukushima Daiichi NPS Nuclide Analysis of the Radioactive Materials in the Fallouts obtained inside and outside of Fukushima Daiichi Nuclear Power Station |
| December 18, 2014 |
Analysis Results of Underground Water around Unit 2 Reactor Building in Fukushima Daiichi NPS |
| December 16, 2014 |
in the soil |
| December 13, 2014 |
Nuclides Analysis Result of Unit 1 discharge channel at Fukushima Daiichi NPS Analysis Results of Underground Water around Unit 2 Reactor Building in Fukushima Daiichi NPS |
| December 12, 2014 |
Seawater collected in offshore area of Ibaraki and Miyagi Prefecture |
| December 10, 2014 |
in the soil |
| December 6, 2014 |
Nuclides Analysis Result of Unit 1 discharge channel at Fukushima Daiichi NPS Analysis Results of Underground Water around Unit 2 Reactor Building in Fukushima Daiichi NPS |
The recent data is here.