Fukushima Daiichi Status Updates

15 April 2015

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 5 to 11 April 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 5 to 11 April 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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14 April 2015

Tokyo Electric Power Company (TEPCO) is conducting a comprehensive review to identify all the possible risks that might have an impact outside the site boundary of the Fukushima Daiichi Nuclear Power Plant, according to information) recently submitted by Japan to the IAEA.

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Tokyo Electric Power Company (TEPCO) is conducting a comprehensive review to identify all the possible risks that might have an impact outside the site boundary of the Fukushima Daiichi Nuclear Power Plant, according to information recently submitted by Japan to the IAEA. The comprehensive review process follows the detection of a puddle of highly contaminated water at the large carry-in entrance rooftop of the Unit 2 Reactor Building on 24 February, which is a potential source of inlets to the drainage system.

In an an interim report released on 9 April, TEPCO also made available the details of the reviewing process, which aim to identify risks that might involve leakage of water or scattering of dust. After risks are identified, they will be classified into five categories: 1. Need further examination, 2. Countermeasures necessary to be taken, 3. Countermeasures in practice, 4. Follow-up observation (after implementing countermeasures) in practice, 5. No need for additional measures.

As for the risks classified as "Countermeasures necessary to be taken", suitable countermeasures will be considered and their implementation will start subsequently. In addition, risks will be regularly reviewed and the result of the review announced.

For further information about the detail of this reviewing process, please see this document.

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8 April 2015

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 29 March to 4 April 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 29 March to 4 April 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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17 March 2015

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

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

In addition, Tokyo Electric Power Company (TEPCO) has recently provided the following information:

TEPCO also released a statement on its website regarding the fourth anniversary of the earthquake and tsunami.

 

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10 March 2015

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 1 to 7 March 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 March 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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4 March 2015

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 22 to 28 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 22 to 28 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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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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Last update: 15 April 2015