Fukushima Daiichi Status Updates

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 provided its assessments, which are contained in full at the end of the report.

In this assessment, the IAEA acknowledges the successful removal of the fuel handling machine from the Unit 3 spent fuel pool by TEPCO. This will allow TEPCO to prepare for removal of the remaining rubble and the spent fuel assemblies from the Unit 3 spent fuel pool. Removal of the fuel is scheduled to start in Fiscal Year 2017.

In addition, the IAEA notes measures to control groundwater ingress, as well as acknowledges TEPCO’s removal of the highly contaminated water from the trenches of Units 2 and 3, which reduces the risk of contaminated water leakage.

TEPCO is also encouraged by the IAEA to continue to review and strengthen its internal and external communication procedures and information disclosure and dissemination to media and the public at large, in line with the advice related to communication matters given by the past IAEA Decommissioning Missions. Details of TEPCO’s communication measures are presented in its 24 August 2015 report.

Regarding the generation of hydrogen gas inside high integrity containers as cited in a previous IAEA assessment in May 2015, IAEA takes note of TEPCO’s investigation which states that the possibility of ignition of hydrogen gas generated in the containers by water radiolysis has been assessed to be low. It also takes note of the measures introduced to address the related issue of liquid level increase inside the containers due to hydrogen gas accumulated in the slurry, resulting in some cases in leakage through the lids. TEPCO is taking steps to prevent leakage, in line with measures suggested during the expert visit in April 2015.

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

Finally, the assessment indicates that the Joint FAO/IAEA Division understands that national regulatory limits for levels of caesium radionuclides in food remain in force, and the authorities in Japan are continuing to implement a programme of food monitoring.

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 provided its assessments, which are contained in full at the end of the report.

In this assessment, the IAEA acknowledges the successful removal of the fuel handling machine from the Unit 3 spent fuel pool by TEPCO. This will allow TEPCO to prepare for removal of the remaining rubble and the spent fuel assemblies from the Unit 3 spent fuel pool. Removal of the fuel is scheduled to start in Fiscal Year 2017.

In addition, the IAEA notes measures to control groundwater ingress, as well as acknowledges TEPCO’s removal of the highly contaminated water from the trenches of Units 2 and 3, which reduces the risk of contaminated water leakage.

TEPCO is also encouraged by the IAEA to continue to review and strengthen its internal and external communication procedures and information disclosure and dissemination to media and the public at large, in line with the advice related to communication matters given by the past IAEA Decommissioning Missions. Details of TEPCO’s communication measures are presented in its 24 August 2015 report.

Regarding the generation of hydrogen gas inside high integrity containers as cited in a previous IAEA assessment in May 2015, IAEA takes note of TEPCO’s investigation which states that the possibility of ignition of hydrogen gas generated in the containers by water radiolysis has been assessed to be low. It also takes note of the measures introduced to address the related issue of liquid level increase inside the containers due to hydrogen gas accumulated in the slurry, resulting in some cases in leakage through the lids. TEPCO is taking steps to prevent leakage, in line with measures suggested during the expert visit in April 2015.

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

Finally, the assessment indicates that the Joint FAO/IAEA Division understands that national regulatory limits for levels of caesium radionuclides in food remain in force, and the authorities in Japan are continuing to implement a programme of food monitoring.

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Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 16 to 22 August 2015, according to the regular update and sea monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 16 to 22 August 2015, according to the regular update and sea 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 9 to 15 August 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 9 to 15 August 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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In its most recent update to the IAEA, Japan has shared a document from TEPCO outlining the details about an accident that occurred with a worker on the weekend who unfortunately died, as well as  a news release concerning the status of water management onsite.

At the same time, radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 2 to 8 August 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

In another report issued on 3 August, Japan’s Ministry of Foreign Affairs presented information to all consulates and missions in Japan on the release record and the post-release sea water monitoring results of "Groundwater bypassing" at the Fukushima Daiichi nuclear power station in July. Detailed analysis of the results of groundwater by TEPCO, Japan Atomic Energy Agency, as well as a third party analytical institution, have shown that the radioactive levels of sampled water have been substantially below operational targets.

In its most recent update to the IAEA, Japan has shared a document from TEPCO outlining the details about an accident that occurred with a worker on the weekend who unfortunately died, as well as  a news release concerning the status of water management onsite.

At the same time, radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 2 to 8 August 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

In another report issued on 3 August, Japan’s Ministry of Foreign Affairs presented information to all consulates and missions in Japan on the release record and the post-release sea water monitoring results of "Groundwater bypassing" at the Fukushima Daiichi nuclear power station in July. Detailed analysis of the results of groundwater by TEPCO, Japan Atomic Energy Agency, as well as a third party analytical institution, have shown that the radioactive levels of sampled water have been substantially below operational targets.

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Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 28 June to 4 July 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 28 June to 4 July 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 July to 11 July 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

At the same time,  information from TEPCO on the overflow of rainwater from Drainage K into the sea outside the port of Fukushima was circulated by Japan's Ministry of Foreign Affairs to consular missions and international organizations in Japan. The report confirms that, on the morning of 16 July, some of the rainwater overflowed into the sea outside the port due to heavy rain. The overflow tapered off as the rain stopped and while measurements of radioactivity rose temporarirly is sea water samples just outside Drainage K, levels outside the port conitnuesto remain low. TEPCO is continuing to monitor the situation and implementing current shifting work to the drainage channels.

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 5 July to 11 July 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

At the same time,  information from TEPCO on the overflow of rainwater from Drainage K into the sea outside the port of Fukushima was circulated by Japan's Ministry of Foreign Affairs to consular missions and international organizations in Japan. The report confirms that, on the morning of 16 July, some of the rainwater overflowed into the sea outside the port due to heavy rain. The overflow tapered off as the rain stopped and while measurements of radioactivity rose temporarirly is sea water samples just outside Drainage K, levels outside the port conitnuesto remain low. TEPCO is continuing to monitor the situation and implementing current shifting work to the drainage channels.

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Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 5 July to 11 July 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

 

 

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 5 July to 11 July 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 28 June to 4 July 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

Japan's Ministry of Foreign Affairs also released a regular report -- sent to all consular missions and international organizations in Japan -- on the release record and post-release sea water monitoring results of groundwater bypassing at the Fukushima Daiichi nuclear power station for the month of June. As in similar past reports, the results show that radioactive levels of sampled water are substantially below operational targets set by Tokyo Electric Power Company (TEPCO). 

 

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 28 June to 4 July 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

Japan's Ministry of Foreign Affairs also released a regular report -- sent to all consular missions and international organizations in Japan -- on the release record and post-release sea water monitoring results of groundwater bypassing at the Fukushima Daiichi nuclear power station for the month of June. As in similar past reports, the results show that radioactive levels of sampled water are substantially below operational targets set by Tokyo Electric Power Company (TEPCO). 

 

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Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 21 to 27 June 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA. 

Tokyo Electric Power Corporation announced that removal of the highly contaminated water into an underground tunnel housing pipes and cables outside the Unit 2 turbine has been completed. Removal of the remaining water at Unit 3 will begin shortly pending government approval.

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 21 to 27 June 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA. 

Tokyo Electric Power Corporation announced that removal of the highly contaminated water into an underground tunnel housing pipes and cables outside the Unit 2 turbine has been completed. Removal of the remaining water at Unit 3 will begin shortly pending government approval.

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Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 7  to 13 June 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

 

 

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 7  to 13 June 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 31 May to 6 June 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 31 May to 6 June 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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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 had provided its assessments, which is contained in full at the end of the report.

The IAEA assessment refers to the final report of the International Decommissioning Peer Review Mission to Japan that took place from 9 to 17 February 2015 was published on 14 May 2015. The scope of this Mission -- and the follow-up expert visit on 17-21 April 2015 -- covered the majority of issues pertaining to current and forecast conditions, radiation worker protection, and actions taken by the Japanese government. A copy of the final report is available here.  

At the time of writing this report, nearly all of the stored water, already treated for the removal of cesium, had been treated for the removal of strontium-90. Approximately 70 per cent of the stored water has also been treated for the removal of the other radionuclides as well, while the remaining 30 per cent would still require additional treatment. The assessment notes that the water thus treated would still contain tritium and storage of treated contaminated water containing tritium in above ground tanks is a temporary measure while TEPCO develops a more sustainable solution. The IAEA is aware of the recent news carried by the media on discovered water leaking and will seek additional information from counterparts in Japan to continue assessment of developments.

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.

Finally, 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.

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 had provided its assessments, which is contained in full at the end of the report.

The IAEA assessment refers to the final report of the International Decommissioning Peer Review Mission to Japan that took place from 9 to 17 February 2015 was published on 14 May 2015. The scope of this Mission -- and the follow-up expert visit on 17-21 April 2015 -- covered the majority of issues pertaining to current and forecast conditions, radiation worker protection, and actions taken by the Japanese government. A copy of the final report is available here.  

At the time of writing this report, nearly all of the stored water, already treated for the removal of cesium, had been treated for the removal of strontium-90. Approximately 70 per cent of the stored water has also been treated for the removal of the other radionuclides as well, while the remaining 30 per cent would still require additional treatment. The assessment notes that the water thus treated would still contain tritium and storage of treated contaminated water containing tritium in above ground tanks is a temporary measure while TEPCO develops a more sustainable solution. The IAEA is aware of the recent news carried by the media on discovered water leaking and will seek additional information from counterparts in Japan to continue assessment of developments.

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.

Finally, 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.

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Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 17 to 23 May 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 17 to 23 May 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 10 to 16 May 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 10 to 16 May 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 26 April to 9 May 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA. 

Tokyo Electric Power Corporation (TEPCO) will soon also be providing significantly more of its radiation monitoring data online for easier analysis.  How and when this data will be disclosed is outlined in this document.

 

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 26 April to 9 May 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA. 

Tokyo Electric Power Corporation (TEPCO) will soon also be providing significantly more of its radiation monitoring data online for easier analysis.  How and when this data will be disclosed is outlined in this document.

 

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Results of groundwater analysis have shown no significant change of radioactivity in sampled groundwater at Fukushima Daiichi nuclear power plant, according to a regular report on release and post-release monitoring of "groundwater bypassing" which was circulated by Japan on 1 May  to  all missions in Tokyo. 

The report covers the record and monitoring  data for  groundwater releases at Fukushima Daiichi on the 5th, 11th, 17th, 23rd and 30th of April. It also  includes measurements taken by Tokyo Electric Power Corporation (TEPCO) during and after the groundwater releases, as well as detailed analysis by a third-party institution of the same groundwater. The results show that the radioactive levels of sampled groundwater are substantially below the operational targets.

Results of groundwater analysis have shown no significant change of radioactivity in sampled groundwater at Fukushima Daiichi nuclear power plant, according to a regular report on release and post-release monitoring of "groundwater bypassing" which was circulated by Japan on 1 May  to  all missions in Tokyo. 

The report covers the record and monitoring  data for  groundwater releases at Fukushima Daiichi on the 5th, 11th, 17th, 23rd and 30th of April. It also  includes measurements taken by Tokyo Electric Power Corporation (TEPCO) during and after the groundwater releases, as well as detailed analysis by a third-party institution of the same groundwater. The results show that the radioactive levels of sampled groundwater are substantially below the operational targets.

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Japan's Tokyo Electric Power Corporation (TEPCO) has identified and categorized all possible risks that might have an impact outside the site boundary of the Fukushima Daiichi Nuclear Power Station following the detection of a puddle of highly contaminated water discovered at the rooftop of the Unit 2 record building on 24 February 2015. Japan's Ministry of Foreign Affairs distributed information on the result of the comprehensive risk review to all embassies, consular missions and international organizations in Japan today.

The risk review identified 190 target items, 124 of which were classified either as countermeasure in practice, needing follow-up observation or needing no additional measures. Of the remaining 66 items, 21 were classified as needing necessary countermeasures, one of which needed immediate countermeasures, and 45 were classified as needing further examination.

The background and nature of the comprehensive risk review is explained in page 4 of the attached document.

Japan's Tokyo Electric Power Corporation (TEPCO) has identified and categorized all possible risks that might have an impact outside the site boundary of the Fukushima Daiichi Nuclear Power Station following the detection of a puddle of highly contaminated water discovered at the rooftop of the Unit 2 record building on 24 February 2015. Japan's Ministry of Foreign Affairs distributed information on the result of the comprehensive risk review to all embassies, consular missions and international organizations in Japan today.

The risk review identified 190 target items, 124 of which were classified either as countermeasure in practice, needing follow-up observation or needing no additional measures. Of the remaining 66 items, 21 were classified as needing necessary countermeasures, one of which needed immediate countermeasures, and 45 were classified as needing further examination.

The background and nature of the comprehensive risk review is explained in page 4 of the attached document.

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Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 19 to 25 April 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA. The update also provides a chart of sampling tests for caesium-137 and caesium-137 taken around the waters of Fukushima from 10 December 2013 to 25 April 2015.

The next update from the NRA is scheduled to be released on 12 May 2015.

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 19 to 25 April 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA. The update also provides a chart of sampling tests for caesium-137 and caesium-137 taken around the waters of Fukushima from 10 December 2013 to 25 April 2015.

The next update from the NRA is scheduled to be released on 12 May 2015.

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Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 12 to 18 April 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority (NRA) to the IAEA.

Radioactivity in water near the Fukushima Daiichi nuclear power plant has remained low and stable from 12 to 18 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.

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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