TEPCO : Result of Radioactive Analysis around Fukushima Daiichi Nuclear Power Station (December, 2015)

Results of Radioactive Analysis around Fukushima Daiichi Nuclear Power Station

Results of radioactive nuclide analysis are published by sampling below items on the premises and the surrounding area of Fukushima Daiichi NPS.

The recent data is here.

Prompt Report of Analysis Results
Definite Results of Analysis
Analysis Results at Water Treatment Facility
Analysis Results of Fish and Shellfish (the ocean area within 20km radius of Fukushima Daiichi NPS)

Prompt Report of Analysis Results (December, 2015)

Air

Air on the premises of Power Station

English form

Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31

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

Seawater

Seawater near Power Station

English form

Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31

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

English form

Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31

Result of radioactive nuclide analysis for the seawater sampled near the intake canals by the side of Unit 1-4 turbine buildings.

Leaked Water near South Discharge Cannel on Unit 1-4 side

English form

Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31

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

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).

Seawater near Port Entrance
(Measurement by Radiation Monitor)

English form

Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31

The concentration level of radioactive materials included in sea water around the port entrance of the power station is measured continuously through a seawater radiation monitor.

Subdrain Water

Subdrain Water near the Turbine Buildings

English form

Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31

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

English form

Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31

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

Sampling from Subdrain and Groundwater Drain

The subdrain and groundwater drain systems started operations from September 2015. The subdrain system (a measure to prevent the increase of contaminated water) pumps up groundwater from around the reactor buildings before it flows into them. The groundwater drain system (a measure to prevent the leakage of contaminated water) pumps up groundwater held back by the installed seaside impermeable wall before it flows into the port area. The water pumped by either system is purified, tested, and then discharged into the port area.
It is then stored in temporary storage tanks and the radioactive concentration is measured to confirm that the water quality does not surpass the upper limits set by TEPCO.
Third-party organizations also analyze the radioactive concentration to ensure the objectivity of the analysis results.

	Cesium 134	Cesium 137	Gross β	Strontium	Tritium
TEPCO's upper limit of radioactive concentration for temporary storage tanks	1Bq/l	1Bq/l	3Bq/l	-	1500Bq/l
Regulatory Notification Limit (for reference)	60Bq/l	90Bq/l	-	30Bq/l	60000Bq/l
WHO Guideline for Drinking Water	10Bq/l	10Bq/l	-	10Bq/l	10000Bq/l

Related materials about the activities and current operational status of Subdrain and Groundwater drain can be found HERE.

Analysis Results of Relay Tanks

English form

Analysis Results of Temporary Storage Tanks and Water Collecting Tanks

English form

Dec 2
Dec 3
Dec 4
Dec 7
Dec 9
Dec 9 (Temporary Storage Tanks : Detail)
Dec 11
Dec 12
Dec 14
Dec 18
Dec 19
Dec 20
Dec 23
Dec 25
Dec 28
Dec 30

Analysis Results of Weighted Average Sampling

*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.

Dec 9 (As of October, 2015)

Analysis Results Regarding Discharge

English form

Dec 3

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	Strontium	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.

*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.

Dec 8 (As of October, 2015)

Analysis Results Regarding Discharge

English form

Dec 4

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

Dec 1
Dec 2
Dec 3
Dec 4
Dec 5
Dec 6
Dec 7
Dec 8
Dec 9
Dec 10
Dec 11
Dec 12
Dec 12 (2)
Dec 13
Dec 14
Dec 15
Dec 16
Dec 17
Dec 18
Dec 19
Dec 19(2)
Dec 20
Dec 21
Dec 22
Dec 23
Dec 24
Dec 25
Dec 26
Dec 26(2)
Dec 27
Dec 28
Dec 29
Dec 30
Dec 31

Observation Hole around H4 Area

English form

Dec 1
Dec 2
Dec 3
Dec 4
Dec 5
Dec 6
Dec 7
Dec 8
Dec 9
Dec 10
Dec 11
Dec 12
Dec 13
Dec 14
Dec 15
Dec 16
Dec 17
Dec 18
Dec 19
Dec 20
Dec 21
Dec 22
Dec 23
Dec 24
Dec 25
Dec 26
Dec 27
Dec 28
Dec 29
Dec 30
Dec 31

Observation Hole around H6 Area

English form

Dec 1
Dec 2
Dec 3
Dec 4
Dec 5
Dec 6
Dec 7
Dec 8
Dec 9
Dec 10
Dec 11
Dec 12
Dec 13
Dec 14
Dec 15
Dec 16
Dec 17
Dec 18
Dec 19
Dec 20
Dec 21
Dec 22
Dec 23
Dec 24
Dec 25
Dec 26
Dec 27
Dec 28
Dec 29
Dec 30
Dec 31

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.

English form

The newest data is on September 30, 2015.

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.

English form

Dec 1
Dec 2
Dec 3
Dec 4
Dec 5
Dec 5 (2)
Dec 6
Dec 7
Dec 8
Dec 9
Dec 10
Dec 11
Dec 12
Dec 13
Dec 14
Dec 15
Dec 16
Dec 17
Dec 18
Dec 19
Dec 20
Dec 21
Dec 22
Dec 23
Dec 24
Dec 25
Dec 26
Dec 27
Dec 28
Dec 29
Dec 30
Dec 31

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.

English form

December 31, 2015	Underground Reservoir Nuclide Analysis Results (As of December 30)
December 29, 2015	Tritium Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of December 21)
December 29, 2015	Nuclide Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of December 28)
December 26, 2015	Underground Reservoir Nuclide Analysis Results (As of December 25)
December 25, 2015	Underground Reservoir Tritium Analysis Results (As of December 18)
December 25, 2015	Underground Reservoir Nuclide Analysis Results (As of December 24)
December 24, 2015	Underground Reservoir Nuclide Analysis Results (As of December 23)
December 23, 2015	Underground Reservoir Observation Holes Nuclide Analysis Results (As of December 22)
December 22, 2015	Tritium Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of December 14)
December 22, 2015	Nuclide Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of December 21)
December 19, 2015	Underground Reservoir Nuclide Analysis Results (As of December 18)
December 18, 2015	Underground Reservoir Tritium Analysis Results (As of December 11)
December 18, 2015	Underground Reservoir Nuclide Analysis Results (As of December 17)
December 17, 2015	Underground Reservoir Nuclide Analysis Results (As of December 16)
December 16, 2015	Underground Reservoir Observation Holes Nuclide Analysis Results (As of December 15)
December 15, 2015	Tritium Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of December 7)
December 15, 2015	Nuclide Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of December 14)
December 12, 2015	Underground Reservoir Nuclide Analysis Results (As of December 11)
December 11, 2015	Underground Reservoir Tritium Analysis Results (As of December 3)
December 11, 2015	Underground Reservoir Nuclide Analysis Results (As of December 10)
December 10, 2015	Underground Reservoir Tritium Analysis Results (As of December 2)
December 10, 2015	Underground Reservoir Nuclide Analysis Results (As of December 9)
December 9, 2015	Underground Reservoir Observation Holes Nuclide Analysis Results (As of December 8)
December 8, 2015	Tritium Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of November 30)
December 8, 2015	Nuclide Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of December 7)
December 5, 2015	Underground Reservoir Nuclide Analysis Results (As of December 4)
December 4, 2015	Underground Reservoir Tritium Analysis Results (As of November 27)
December 4, 2015	Underground Reservoir Nuclide Analysis Results (As of December 3)
December 3, 2015	Underground Reservoir Nuclide Analysis Results (As of December 2)
December 2, 2015	Underground Reservoir Observation Holes Nuclide Analysis Results (As of December 1)
December 1, 2015	Tritium Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of November 23)
December 1, 2015	Nuclide Analysis Results of the Underground Bypass (Investigation Holes/Pumping Well) and the Sea Side Observation Holes (As of November 30)

Other

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December 31, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 30, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 29, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 28, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 27, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 26, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 25, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet in the ocean soil off the coast (Dry Soil Rate : November 2015)
December 24, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet Nuclide Analysis of the Radioactive Materials in the Fallouts obtained inside and outside of Fukushima Daiichi NPS Nuclides Analysis Result of the Radioactive Materials in the Air at the Upper Part of Unit 1 Reactor Building 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 NPS Gas Sampling Results of Unit 2 PCV Gas Control System Conducted at Fukushima Daiichi NPS Gas Sampling Results of Unit 3 PCV Gas Control System Conducted at Fukushima Daiichi NPS 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)
December 23, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 22, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet in the soil
December 21, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 20, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 19, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 18, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 17, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 16, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 15, 2015	Seawater collected in offshore area of Ibaraki and Miyagi Prefecture Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 14, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 12, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 11, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 10, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 9, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 8, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 7, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 6, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 5, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 4, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 3, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 2, 2015	Seawater collected in offshore area of Miyagi Prefecture Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet
December 1, 2015	Fukushima Daiichi Nuclear Power Station: Radiation Analysis Results at K Drainage Outlet

English form

Definite Report of Analysis Results

The analysis results of the major 3 nuclides (I-131, Cs-134, Cs-137) are updated daily as a prompt report above.
Here, the reevaluation of the major 3 nuclides and analysis results of other γ nuclides are posted as a definite report.

English form

December 18, 2015	Definite Results of Nuclides Analysis at Fukushima Daiichi Nuclear Power Station (Announced on November 16 - 30, 2015)
December 15, 2015	Definite Results of Nuclides Analysis at Fukushima Daiichi Nuclear Power Station (Announced on November 1 - 15, 2015)

Analysis Results at Water Treatment Facility

English form

December 22, 2015	Nuclide analysis results of water at water treatment facility

Analysis Results of Fish and Shellfish
(the ocean area within 20km radius of Fukushima Daiichi NPS)

December 17, 2015	Port Area of Fukushima Daiichi NPS Ocean Area within 20km Radius of Fukushima Daiichi NPS
December 9, 2015	The Ocean Area Within 20km Radius of Fukushima Daiichi NPS(Samples collected in 2nd quarter of FY2015)

Monitoring by sampling

Results of Radioactive Analysis around Fukushima Daiichi Nuclear Power Station

Prompt Report of Analysis Results (December, 2015)

Air

Air on the premises of Power Station

Seawater

Seawater near Power Station

Seawater near Intake Canals by Unit 1-4 side

Leaked Water near South Discharge Cannel on Unit 1-4 side

Seawater near Port Entrance (Measurement by Radiation Monitor)

Subdrain Water

Subdrain Water near the Turbine Buildings

Subdrain Water around Centralized Radiation Waste Treatment Facility

Sampling from Subdrain and Groundwater Drain

Analysis Results of Relay Tanks

Analysis Results of Temporary Storage Tanks and Water Collecting Tanks

Analysis Results of Weighted Average Sampling

Analysis Results Regarding Discharge

Sampling regarding Groundwater Bypass

Analysis Results of Pump Well

Analysis Results of Temporary Storage Tanks

Analysis Results of Weighted Average Sampling

Analysis Results Regarding Discharge

Monitoring regarding Water Leakage Tanks

South Water Outlet, Drainage Channel

Observation Hole around H4 Area

Observation Hole around H6 Area

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

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

Detailed Analysis Results of Groundwater around Unit 1-4 Buildings

Analysis Results of Underground Reservoirs

Other

Definite Report of Analysis Results

Analysis Results at Water Treatment Facility

Analysis Results of Fish and Shellfish (the ocean area within 20km radius of Fukushima Daiichi NPS)

Seawater near Port Entrance
(Measurement by Radiation Monitor)

Analysis Results of Fish and Shellfish
(the ocean area within 20km radius of Fukushima Daiichi NPS)