Fukushima Daiichi Status Updates

27 February 2015

The Japanese Government has provided the IAEA with a report that summarizes the events and highlights the progress related to recovery operations at the Fukushima Daiichi Nuclear Power Station. The IAEA has provided its assessments which is contained in full at the end of the report.

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The Japanese Government has provided the IAEA with a report that summarizes the events and highlights the progress related to recovery operations at the Fukushima Daiichi Nuclear Power Station. The IAEA has provided its assessments which is contained in full at the end of the report.

First, this assessment refers to the third International Decommissioning Peer Review Mission to Japan that took place from 9 to 17 February 2015.  The objective of the Mission was to provide an independent review of the activities associated with revisions to the planning and implementation of the Fukushima Daiichi Nuclear Power Plant decommissioning.  A Preliminary Summary Report from the Mission is available here.

The IAEA assessment further looks at the sea area radioactivity monitoring results and other related information that has been made available.  The IAEA considers here that the situation in the marine environment is stable but should continue to be monitored.

The assessment indicates that the Agency considers that systems are in place and are being implemented that prevent food and agricultural products with levels of caesium radionuclides in excess of the national regulatory limits from entering the food supply chain. 

Finally, the Agency welcomes the Japanese Government's issuance of this information to the IAEA Member States and the public, detailing the current status of the recovery operations. The IAEA will continue to share such valuable information as it is provided.

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27 February 2015

On 18 February 2015, Japan's Nuclear Regulation Authority (NRA) identified measures for Mid-term Risk Reduction at TEPCO's Fukushima Daiichi Nuclear Power Station.

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On 18 February 2015, Japan's Nuclear Regulation Authority (NRA) identified measures for Mid-term Risk Reduction at TEPCO’s Fukushima Daiichi Nuclear Power Station. The document is also available on the NRA's website here, here and here.

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25 February 2015

Radioactivity in seawater near the Fukushima Daiichi Nuclear Power Plant has remained low and stable from 15 to 22 February 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

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Radioactivity in seawater near the Fukushima Daiichi Nuclear Power Plant has remained low and stable from 15 to 22 February 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.  An analysis of the seawater from the area around the outside of the port of Fukushima Daiichi was also received.

The Tokyo Electric Power Company (TEPCO) has posted a news release on its website containing measurements of contaminated water which was detected on Sunday, 22 February 2015.

Additionally, the NRA has provided the IAEA with information about a newly-discovered but unrelated puddle of highly contaminated water at the Unit 2 Reactor Building. More information on the puddle of rainwater was posted on TEPCO's website.

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17 February 2015

Radioactivity in water near the Fukushima Daiichi Nuclear Power Plant has remained low and stable from 25 to 31 January 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

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Radioactivity in water near the Fukushima Daiichi Nuclear Power Plant has remained low and stable from 8 to 14 February 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

TEPCO has also posted a document with pictures from the recent IAEA visit.  The full images are available here.

Additionally, Japan's Nuclear Regulatory Authority (NRA) provided the IAEA with two news releases from TEPCO,  a news release on INES Rating Not Applicable to Contaminated Water Leakage in H4 Tank Area at Fukushima Daiichi NPS on 19 August 2013, and another news release on Permission for Changes in Reactor Installation of Units 3 and 4, Takahama Nuclear Power Station, Kansai Electric Power Co., Inc.

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10 February 2015

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 1 to 7 February 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

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Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 1 to 7 February 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

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3 February 2015

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 25 to 31 January 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

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Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 25 to 31 January 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

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27 January 2015

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 18 to 24 January 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

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Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 18 to 24 January 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

The NRA also provided a progress report on its mid- and-long term roadmap for decommissioning and contaminated water management.

On Friday 23 January 2015, TEPCO announced that they were extending the deadline (originally set for March 2015) for the completion of the treatment of accumulated contaminated water. The following press release and information sheet provide more information.

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20 January 2015

Measurements of seawater obtained in the vicinity of the Fukushima Daiichi Nuclear Power station remained low and stable between 11 to 17 January 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority to the IAEA.

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Measurements of seawater obtained in the vicinity of the Fukushima Daiichi Nuclear Power station remained low and stable between 11 to 17 January 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority to the IAEA.

The recently reported deaths of two workers - one in Daiichi and the other in Daiini - have both been classified as accidents and not related to any radiological exposure.

The following news stories have further information:

http://www.tepco.co.jp/en/press/corp-com/release/2015/1247504_6844.html
http://www.tepco.co.jp/en/press/corp-com/release/2015/1247513_6844.html

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13 January 2015

Measurements of seawater obtained in the vicinity of the Fukushima Daiichi Nuclear Power station continued to show low and stable results between 4 to 11 January, according to the regular update and sea area monitoring results provided by Japan¹s Nuclear Regulation Authority to the IAEA.

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Measurements of seawater obtained in the vicinity of the Fukushima Daiichi Nuclear Power station continued to show low and stable results between 4 to 11 January, according to the regular update and sea area monitoring results provided by Japan¹s Nuclear Regulation Authority to the IAEA.

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7 January 2015

Radioactive levels of sampled water near the Fukushima Daiichi nuclear power plant have remained substantially below operational targets, according to a report by Japan’s Ministry of Foreign Affairs provided to the IAEA.

The report, which is provided monthly to all Missions in Tokyo, covers groundwater bypassing measurements taken on the 4th, 10th, 16th, 22nd and 29th of December.

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Radioactive levels of sampled water near the Fukushima Daiichi nuclear power plant have remained substantially below operational targets, according to a report by Japan’s Ministry of Foreign Affairs provided to the IAEA.

The report, which is provided monthly to all Missions in Tokyo, covers groundwater bypassing measurements taken on the 4th, 10th, 16th, 22nd and 29th of December.

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6 January 2015

All radionuclides in sea water continue to remain low and stable between 22 December to 3 January in the vicinity of the Fukushima Daiichi Nuclear Power Station, based on the regular update and sea area monitoring results provided by Japan¹s Nuclear Regulation Authority to the IAEA on 6 January 2015.

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All radionuclides in sea water continue to remain low and stable between 22 December to 3 January in the vicinity of the Fukushima Daiichi Nuclear Power Station, based on the regular update and sea area monitoring results provided by Japan¹s Nuclear Regulation Authority to the IAEA on 6 January 2015.

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24 December 2014

All radionuclides in sea water remained low and stable in the vicinity of the Fukushima Daiichi Nuclear Power Station, according to an update and monitoring results provided to the IAEA by Japan's Nuclear Regulation Authority on 24 December.

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All radionuclides in sea water remained low and stable in the vicinity of the Fukushima Daiichi Nuclear Power Station, according to an update and monitoring results provided to the IAEA by Japan's Nuclear Regulation Authority on 24 December.

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24 December 2014

Fuel removal from the Unit 4 Spent Fuel Pool at the Fukushima Daiichi Nuclear Power Station was completed on 22 December, according to a news release provided to the IAEA by Japan's Nuclear Regulation Authority on 24 December. This marks a major step towards the decommissioning of the plant.

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Fuel removal from the Unit 4 Spent Fuel Pool at the Fukushima Daiichi Nuclear Power Station was completed on 22 December, according to a news release provided to the IAEA by Japan's Nuclear Regulation Authority on 24 December. This marks a major step towards the decommissioning of the plant.

Removal of the 1,535 fuel assemblies including the 1,331 spent fuel and the other unused fuel from Unit 4 began in November 2013 after extensive work to stabilize the heavily damaged building. The spent fuel assemblies have been moved from a spent fuel pool that is suspended four stories high to a pool in a separate building at ground level. The unused fuel was removed and transported to a pool in Unit 6, one of two reactor buildings at the facility that was not damaged during the March 2011 earthquake and tsunami.

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19 December 2014

On 19 December 2014, Japan¹s Nuclear Regulation Authority (NRA) provided the IAEA with a copy of a press release regarding leakage of water treated by the multi-nuclide removal facility (ALPS) at the Fukushima Daiichi nuclear power station. The leakage resulted from an open valve in an open end of the branch pipe connected to the main pipe.

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On 19 December 2014, Japan¹s Nuclear Regulation Authority (NRA) provided the IAEA with a copy of a press release regarding leakage of water treated by the multi-nuclide removal facility (ALPS) at the Fukushima Daiichi nuclear power station. The leakage resulted from an open valve in an open end of the branch pipe connected to the main pipe.

The press release confirmed that the leakage of treated water was stopped and contained and that leakage to the ocean had been ruled out.

The NRA will continue to be vigilant about TEPCO¹s cause determination and prevention measures, the press release said.

Photos of the open of the branch from where the leak came from and accumulated water in the pipe trench are also attached in the NRA press release.

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16 December 2014

On 16 December 2014, the Nuclear Regulation Authority (NRA) of Japan provided the IAEA with an update on radioactivity in seawater at TEPCO's Fukushima Daiichi Nuclear Power Station (NPS).

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On 16 December 2014, the Nuclear Regulation Authority (NRA) of Japan provided the IAEA with an update on radioactivity in seawater at TEPCO's Fukushima Daiichi Nuclear Power Station (NPS).

The update on the daily monitoring by TEPCO of seawater near the Fukushima Daiichi NPS indicates that the concentrations of all radionuclides (i.e. Cs-134, Cs-137, total Beta and H-3) remained low and stable from 7 November to 13 December 2014 at the sampling points T-1 and T-2-1.

In addition, the NRA provided an update on sea area monitoring results for radioactivity obtained from sea water samples taken at a distance of 2 to 200 kilometres from TEPCO's Fukushima Daiichi NPS.

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9 December 2014

On 9 December 2014, the Nuclear Regulation Authority (NRA) of Japan provided the IAEA with an update on radioactivity in seawater at TEPCO's Fukushima Daiichi Nuclear Power Station (NPS).

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On 9 December 2014, the Nuclear Regulation Authority (NRA) of Japan provided the IAEA with an update on radioactivity in seawater at TEPCO's Fukushima Daiichi Nuclear Power Station (NPS).

The update on the daily monitoring by TEPCO of seawater near the Fukushima Daiichi NPS indicates that the concentrations of all radionuclides (i.e. Cs-134, Cs-137, total Beta and H-3) remained low and stable from 30 November to 6 December 2014 at the sampling points T-1 and T-2-1.

In addition, the NRA provided an update on sea area monitoring results for radioactivity obtained from sea water samples taken at a distance of 2 to 200 kilometres from TEPCO's Fukushima Daiichi NPS.

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2 December 2014

On 2 December 2014, the Nuclear Regulation Authority (NRA) of Japan provided the IAEA with an update on radioactivity in seawater at TEPCO's Fukushima Daiichi Nuclear Power Station (NPS).

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On 2 December 2014, the Nuclear Regulation Authority (NRA) of Japan provided the IAEA with an update on radioactivity in seawater at TEPCO's Fukushima Daiichi Nuclear Power Station (NPS).

The update on the daily monitoring by TEPCO of seawater near the Fukushima Daiichi NPS indicates that the concentrations of all radionuclides (i.e. Cs-134, Cs-137, total Beta and H-3) remained low and stable from 23 to 29 November 2014 at the sampling points T-1 and T-2-1.

In addition, the NRA provided an update on sea area monitoring results for radioactivity obtained from sea water samples taken at a distance of 2 to 200 kilometres from TEPCO's Fukushima Daiichi NPS.

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1 December 2014

On 1 December 2014, Japan provided the IAEA with a copy of a regular report, provided to all Missions and international organizations in Tokyo, on the release record and the post-release sea water monitoring results of "Groundwater bypassing" at the Fukushima Daiichi Nuclear Power Station (NPS) during November 2014. Following the 28 October 2014 release, groundwater at the Fukushima Daiichi NPS was released on 2, 7, 12, 17, 22 and 28 November 2014. The analysis results of groundwater have shown that the radioactive levels of sampled water have been substantially below the operational targets.

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On 1 December 2014, Japan provided the IAEA with a copy of a regular report, provided to all Missions and international organizations in Tokyo, on the release record and the post-release sea water monitoring results of "Groundwater bypassing" at the Fukushima Daiichi Nuclear Power Station (NPS) during November 2014. Following the 28 October 2014 release, groundwater at the Fukushima Daiichi NPS was released on 2, 7, 12, 17, 22 and 28 November 2014. The analysis results of groundwater have shown that the radioactive levels of sampled water have been substantially below the operational targets.

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25 November 2014

On 25 November 2014, the Nuclear Regulation Authority (NRA) of Japan provided the IAEA with an update on radioactivity in seawater at TEPCO's Fukushima Daiichi Nuclear Power Station (NPS).

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On 25 November 2014, the Nuclear Regulation Authority (NRA) of Japan provided the IAEA with an update on radioactivity in seawater at TEPCO's Fukushima Daiichi Nuclear Power Station (NPS).

The update on the daily monitoring by TEPCO of seawater near the Fukushima Daiichi NPS indicates that the concentrations of all radionuclides (i.e. Cs-134, Cs-137, total Beta and H-3) remained low and stable from 16 to 23 November 2014 at the sampling points T-1 and T-2-1.

In addition, the NRA provided an update on sea area monitoring results for radioactivity obtained from sea water samples taken at a distance of 2 to 200 kilometres from TEPCO's Fukushima Daiichi NPS.

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20 November 2014

The Japanese Government has provided the IAEA with a report that summarizes the events and highlights the progress related to recovery operations at the Fukushima Daiichi Nuclear Power Station. The IAEA has provided its assessments which is contained in full at the end of the report.

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The Japanese Government has provided the IAEA with a report that summarizes the events and highlights the progress related to recovery operations at the Fukushima Daiichi Nuclear Power Station. The IAEA has provided its assessments which is contained in full at the end of the report.

Based on the sea area monitoring results and on other related information that has been made available, the IAEA considers the situation in the marine environment to be stable but should continue to be monitored.

Regarding the removal of spent fuel assemblies from Unit 4 that was completed by 5 November 2014, the IAEA acknowledges TEPCO's continuing efforst to undertake the work in a safe and steady manner and encourages TEPCO to keep implementing its good practices in decomissioning of the Fukushima Daiichi Nuclear Power Plant, with the highest priority to be placed on the safety of the public, workers and the environment.

As for the addition of water treatment systems, the IAEA considers that TEPCO's efforts are in line with the advice given by the IAEA review mission on decommissioning in late 2013, and that the improvement of treatment capacity will contribute to accelerating the treatment of the large volume of contaminated water stored on site. The IAEA also encourages TEPCO to continue its practices to further enhance the performance and capacity of the water treatment systems to address the contaminated water problem in a sustainable manner and to reduce the associated risks.

Regarding the off-site decontamination, the IAEA notes that Japan has been making significant efforts in the environmental remediation activities, together with the reconstruction of the infrastructure and the rehabilitation of the local communities to facilitate residents' return. The IAEA encourages Japan to continue its efforts in this regard. 

As for food products, the IAEA considers that systems are in place and are being implemented that prevent food and agricultural products with levels of caesium radionuclides in excess of the regulatory limits from entering the food supply chain. The revisions and updates to the food restrictions indicate the continued vigilance of the authorities in Japan and their commitment to protecting consumers and trade.  Based on the information that has been made available, the Joint FAO/IAEA Division understands that the measures taken to monitor and respond to issues regarding radionuclide contamination of food are appropriate and that the food supply chain is under control.

The Agency welcomes the Japanese Government's issuance of this information to the IAEA Member States and the public, detailing the current status of the recovery operations. The IAEA will continue to share such valuable information as it is provided.

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Last update: 27 February 2015