Usuário(a):Fbergo/Drafts/Monju

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Monju (もんじゅ?) foi uma usina nuclear com um reator rápido experimental refrigerado por sódio, próxima à usina nuclear de Tsuruga, em Fukui, Japão. Sua construção começou em 1986 e o reator atingiu criticalidade pela primeira vez em Abril de 1994. O reator permaneceu inoperante a maior parte do tempo desde que foi construído. Ele operou pela última vez em 2010[1] antes de ser definitivamente desativado.

O reator de Monju era referigerado por sódio, alimentado por combustível MOX, com três anéis primários de refrigeração, projetado para produzir 280 MWe a partir de 714 MWt. Sua proporção de reprodução era aproximadamente 1,2.[2] A usina foi construída em uma área de 1,08 km2, com edificações que ocupavam uma área de 28.678 m2.

Um acidente em Dezembro de 1995, em que um vazamento de sódio causou um incêndio de grandes proporções, forçou a desativação do reator. Os operadores da usina tentaram esconder a gravidade do acidente, causando um escândalo que atrasou a reativação do reator até 6 de Maio de 2010, antingindo criticalidade novamente em 8 de Maio.[3] Em Agosto de 2010 outro acidente, em que maquinário foi derrubado, fez o reator ser novamente desativado. Até Junho de 2011 o reator tinha gerado eletricidade por apenas uma hora desde seus primeiros testes na década de 1990.[4] Até o final de 2010, a construção e operação da usina haviam custado 1,08 trilhões de Ienes. Foi estimado que 160–170 bilhões de Ienes seriam necessários para manter a usina em operação por mais 10 anos.[5]

Em Dezembro de 2016 o governo do Japão decidiu desativar definitivamente a usina.[6][7][8] Em Dezembro de 2017 a Agência de Energia Atômica do Japão enviou o plano de desativação da Usina de Monju para aprovação da Agência de Regulamentação Nuclear. O plano prevê que a desativação e desmonte da usina devem ser concluídos até 2047 e a operação deve custar 375 bilhões de Ienes[9]


History[editar | editar código-fonte]

1995 sodium leak and fire[editar | editar código-fonte]

On December 8, 1995, the reactor suffered an accident rated level 1 on the International Nuclear Event Scale (INES).[10][11] Intense vibration caused a thermowell inside a pipe carrying sodium coolant to break, possibly at a defective weld point, allowing several hundred kilograms of sodium to leak out onto the floor below the pipe. Upon contact with air, the liquid sodium reacted with oxygen and moisture in the air, filling the room with caustic fumes and producing temperatures of several hundred degrees Celsius. The heat was so intense that it warped several steel structures in the room. An alarm sounded around 7:30 p.m., switching the system over to manual operations, but a full operational shutdown was not ordered until around 9:00 p.m., after the fumes were detected. When investigators located the source of the spill they found as much as three tons of solidified sodium.

The leak occurred in the plant's secondary cooling system, so the sodium was not radioactive. However, there was massive public outrage in Japan when it was revealed that Power Reactor and Nuclear Fuel Development Corporation (PNC), the semi-governmental agency then in charge of Monju, had tried to cover up the extent of the accident and resulting damage. This coverup included falsifying reports and the editing of a videotape taken immediately after the accident, as well as issuing a gag order that aimed to stop employees revealing that tapes had been edited.[12][13]

The official in charge of investigating the coverup, Shigeo Nishimura, committed suicide by leaping from the roof of a Tokyo hotel. Nishimura was deputy general manager of the general affairs department of the Power Reactor and the Nuclear Fuel Development Corporation, the Government concern that ran the country's prototype fast-breeder reactor.[14] Officials said Nishimura was not involved in the cover-up but was distressed by evidence he had unearthed.

2010 Restart[editar | editar código-fonte]

Monju in 2007

On November 24, 2000, Japan Atomic Energy Agency announced their intention to restart the Monju reactor. This decision was met with resistance by the public, resulting in a series of court battles. On January 27, 2003, the Nagoya High Court's Kanazawa branch made a ruling reversing its earlier 1983 approval to build the reactor, but then on May 30, 2005, Japan's Supreme Court gave the green light to reopen the Monju reactor.

The nuclear fuel was replaced for the restart. The original fuel loaded was mixed plutonium-uranium oxide with plutonium content of around 15–20%, but by 2009, due to natural radioactive decay, the fuel had only half of the original plutonium-241 content. This made achieving criticality impossible, requiring fuel replacement.[3]

The restart was scheduled for October 2008, having been moved back five months.[15] A restart date of February 2009 was again delayed due to the discovery of holes in the reactor's auxiliary building; in August 2009 it was announced that restart might be in February 2010.[16]

In February 2010, JAEA obtained official approval to restart the reactor from the Japanese Government. The restart was definitely scheduled for the end of March.[17] In late February, JAEA requested Fukui Prefecture and Tsuruga City for deliberations aimed at resuming test operation. Having obtained the go ahead from both entities, JAEA started criticality testing, after which it took some months before commercial operation could resume – as for any new nuclear plant.[18]

Operators started withdrawing control rods on May 6, 2010, marking the restart of the plant. The Fukui Prefecture governor, Issei Nishikawa asked the METI for additional stimulus to the prefecture including an expansion of the Shinkansen in turn for the restart of the plant.[necessário esclarecer] Monju achieved criticality on May 8, at 10:36 AM JST. Test runs were to continue until 2013, at which point the reactor could have started to feed power into the electric grid, beginning "full fledged" operation.[19]

2010 "In‐Vessel Transfer Machine" falling accident[editar | editar código-fonte]

On August 26, 2010, a 3.3-tonne "In‐Vessel Transfer Machine" fell into the reactor vessel when being removed after a scheduled fuel replacement operation.[20] On October 13, 2010, an unsuccessful attempt was made to retrieve the machine.[21] The JAEA tried to recover the device used in fuel exchange but failed as it had become misshaped, preventing its retrieval through the upper lid.[22]

The JAEA began preparatory engineering work on May 24, 2011 to set up equipment to be used to retrieve the IVTM that fell inside the vessel.[22] The fallen device was successfully retrieved from the reactor vessel on June 23, 2011.[23]

2012 Sodium-heater failure[editar | editar código-fonte]

On Sunday 2 June 2012 the sodium heater, which keeps the sodium molten as a secondary coolant, ceased operating for half an hour from about 4:30 p.m. The power supply was checked, but insufficient information in the service manual caused the heater to stop, causing a fall of about 40 C from 200 C of the sodium temperature. Under the internal rules of JAEA, the failure was regarded a too minor incident to report it to the authorities, but the next day the Nuclear Regulation Authority and local governments were informed about the incident. However it was not made public.[24]

2013 New Director of the JAEA appointed[editar | editar código-fonte]

On 31 May 2013 science and technology minister Hakubun Shimomura announced that Shojiro Matsuura, (77 years) the former chairman of the Nuclear Safety Commission, would be the next president of JAEA on Monday 3 June. In this function he would reorganize the JAEA, with safety as a top priority.

Former[carece de fontes?] functions of Matsuura:[25]

  • November 1998 President, JAERI (After experience as Vice President)
  • April 2000 Chairman, Nuclear Safety Commission

Present functions:

  • November 2012 Chairman, Japan Nuclear Safety Institute
  • June 2013 President, Japan Atomic Energy Agency [26]

Omitted safety inspections[editar | editar código-fonte]

During safety inspections conducted by the NRA between 3 and 21 June 2013, it was revealed that the safety inspections on another 2,300 pieces of equipment had been omitted by JAEA.[27] In 2014 more uninspected equipment was discovered, and more than 100 improper corrections to inspection records found, leading to concerns that inspection reports were being falsified.[28] Again in 2015 it was discovered that regular degradation assessments measuring the thickness of sodium cooling pipes had not been carried out since 2007.[29]

Further incidents[editar | editar código-fonte]

On 16 February 2012 NISA reported that a sodium-detector malfunctioned. About 3 p.m local time the alarm went off. Additionally, a ventilator that should cool a pipe stopped. According to NISA no leakage was found, and there was no damage to the environment. Repairs were planned.[30]

On 30 April 2013 an operating error rendered two of the three emergency generators unusable. During the monthly testing of the emergency diesel generators, staff forgot to close six of the twelve valves they had opened before testing, releasing thick black smoke. JAERI reported it to the Nuclear Regulation Authority as a breach of security regulations.[31]

On Monday 16 September 2013 before 3 a.m. the data transmission of the reactor stopped to the government's Emergency Response Support System. Whether this was caused by Typhoon Man-yi, the powerful typhoon that went through Japan that day, was unknown. At that moment it was not possible to restore the connection, because the reactor site in Tsuruga was inaccessible due to mudslides and fallen trees caused by the typhoon.[32]

On August 3, 2016, it was discovered that an alert triggered on November 19, 2015, when the quality of the water in a spent nuclear fuel rod pool deteriorated, was ignored until April 2016 and rectified only the next month.[33]

Developments since Fukushima-Daiichi accident in March 2011[editar | editar código-fonte]

In September 2011 the ministry of education, science and technology asked for the fiscal year of 2012 only 20 to 30 percent of the budget to maintain and manage the Monju reactor for the year 2011. The uncertainty about Japan's future energy policy caused the ministry to conclude that the project could not proceed.[34]

The test run of the reactor, in which the reactor's output would be raised to 40 percent of its capacity by the end of March 2012, was postponed on September 29, 2011, by the Japanese Government because the uncertainty over the future of nuclear energy. After the disaster in Fukushima, the Atomic Energy Commission of Japan made a start with a review of Japan's long term energy policy. An outline of this policy would be published within 12 months. On September 30, officials of the Science and Technology ministry explained their decision not to start the test run at meetings in the city of Tsuruga and Fukui Prefecture.[35]

The local Fukui edition of the Asahi Shinbun reported on June 22, 2012 that the reactor would restart in July 2012.[36]

After it was revealed in November 2012, that regular safety checks had been omitted, the Nuclear Regulation Authority ordered JAEA to change its maintenance rules and inspection plans. JAEA had failed to perform periodical safety checks on nearly 10,000 out of 39,000 pieces of equipment at the plant before the deadlines were met. Half May 2013 not all details were worked out, and under the rules set by the NRA, it was not allowed to change nuclear fuel rods or move the control rods. Therefore, the restart of the reactor was not permitted.[37]

On 16 May 2013 the NRA ordered JAEA President Atsuyuki Suzuki to comply with their decisions and planned a meeting on 23 May to explain their reasoning, making it very likely that the NRA would block the reactivation of the reactor. In reaction to this Suzuki told reporters, "It takes nearly one year for preparation and it is physically quite difficult (to restart the reactor before March 2013)."[38] Because the criticism of the NRA on the sloppy safety controls Atsuyuki Suzuki resigned as President of JAEC on 17 May.[carece de fontes?] Although the resignation was accepted by the government, the move was a surprise, because on May 16 Susuki had spoken on a meeting in the Japanese parliament, the Diet, and to the NRA secretariat and had pleaded to restore the public's trust in the JAEC. The NRA commented, that Suzuki's resignation had not solved fundamental problems and that there was a need to restructure the JAEA as an organization.

Suzuki (born 1942) was an authority on the nuclear fuel cycle, and became President of the JAEA in August 2010. Before this he was a professor at the University of Tokyo and the chairman of the former Nuclear Safety Commission. Yonezo Tsujikura, vice president of the JAEA, served as acting president until a successor was chosen.[39]

At the end of the fiscal year 2011, a budget of US$29 million was requested to continue the Monju project. This money would cover the costs of maintenance and the costs of the test run, planned in the summer of 2012. On 20 November a seven-member Japanese government commission decided that the future of the Monju reactor should be thoroughly reviewed before a decision could be made for this 2012 budget. Some members of the commission thought that there would be little public support for restarting the fast breeder project, and that it was uncertain that the reactor could be taken into commercial service in 2050 as originally planned. Other members said that the Monju project should be stopped completely, and that all efforts should be put into the international fusion reactor project ITER instead. Decisions about the 2012 budget would be taken after the discussions in a panel of cabinet members about the nuclear policy of Japan, including the fast breeder reactor project, would be complete.[40]

Reports in 2012 indicated that plans to generate electricity at Monju would be abandoned, and the plant repurposed into a research centre for handling spent nuclear fuel.[41][42]

On 29 May 2013, the NRA announced that JAEA was prohibited from restarting the fast breeder reactor, describing the safety culture at the plant as "deteriorated", because the problems at the plant were not addressed, and the staff were aware of the delayed inspections. The NRA said that before it could plan a restart of the reactor, JAEA must allocate appropriate funds and human resources to rebuild a maintenance and management system to prevent the recurrence of coolant leakages and other problems. The NRA also announced that an assessment would be made of whether geologic faults at the location of the Monju facility are active. It had similar plans for surveys at six facilities all over Japan.[43]

On 2 March 2015 Noboru Hirose, a senior NRA official, told NHK[44] at the beginning of a 3-week regular safety check that he could not say when test runs would be permitted to start. He would first need to examine how safety checks are conducted and whether adequate measures are in place to avoid a repeat of earlier problems. JAEA had hoped the ban would be lifted by the end of March 2015.

Seismic research in 2011, 2012 and 2013[editar | editar código-fonte]

On 5 March 2012 a group of seismic researchers revealed the possibility of a 7.4M (or even more potent) earthquake under the Tsuruga Nuclear Powerplant. Before this date the Japanese governmental Earthquake Research Committee and Japan Atomic Power had calculated that the Urasoko fault under the plant, combined with other faults connected to it, was around 25 km long. and could cause a 7.2M quake and a 1.7 meter displacement. On top of this, the presence of the oceanic faults were not taken into account by NISA and JAP in the assessment of the safety of the Tsuruga nuclear power plant.

Analysis of sonic survey and other data provided by Japan Atomic Power analysed by a panel of experts of Nuclear and Industrial Safety Agency showed the presence of multiple faults existing within 2 to 3 km from the Urasoko fault. According to Sugiyama, a member of this group of scientists, these faults were highly likely to be activated together, and this would extend the length of the Urasoko fault to 35 km.

Computer simulations calculating the length of a fault based on its displacement, showed the Urasoko fault to be 39 km long, a result close to the length estimated by the sonic survey data, and the fault could cause some 5 meter displacement when activated together with other faults.

Yuichi Sugiyama, the leader of this research group of the National Institute of Advanced Industrial Science and Technology, warned that – as other faults on the south side of the Urasoko fault could become activated together – "The worst case scenario should be taken into consideration"

According to the experts there were many other faults located under one reactor on the west side of the Urasoku fault that could move also simultaneously. If this would be confirmed, the location of the Tsuruga nuclear plant would be disqualified.[45]

On 6 March 2012 NISA asked Japan Atomic Power Co. to reassess the worst-case scenario for earthquakes at the Tsuruga Nuclear Power Plant. What damage this could do to the buildings on the site, because the Urazoko fault, running around 250 meters from the reactor buildings, could have a serious impact on the earthquake resistance of the power plant. NISA was also planning to send similar instructions to two other nuclear power plant operators in the Fukui area: Kansai Electric Power Company, and Japan Atomic Energy Agency. Because the Mihama Nuclear Power Plant and the Monju fast breeder reactor could also be affected by a possible earthquake caused by the Urazoko fault.[46]

On 17 July 2013 a commission of five experts led by NRA commissioner Kunihiko Shimazaki started the investigations on the geological activity of 8 zones of crushed rock under the reactor. Whether these old faults could move in conjunction with the active fault situated half a kilometer from the reactor site, and would constitute a hazard for the reactor safety. One of the experts, Chiba University professor Takahiro Miyauchi,[47] did not take part in the two-day survey, but would visit the site afterwards.[48] On Thursday 18 July Kunihiko Shimazaki told reporters, that his team could not yet reach a conclusion, further research was needed. Another acoustic survey of the grounds was planned by Japan Atomic Energy Agency and a geological examination to determine the age of the clay and stones in the faults. This could take a couple of months to finish, The assessment was planned at the end of August 2013.[49]

Decommissioning plans[editar | editar código-fonte]

On 21 October 2011 the Japanese government appointed a commission to study ways to cut wasteful expenditures, one possibility being decommissioning the Monju prototype fast breeder reactor. The Government Revitalization Unit took up this issue, because the calls to abolish this reactor were growing after the nuclear accident at Fukushima. As the accident at the Fukushima Daiichi power plant made it difficult, if not impossible, to build new nuclear power plants, the government panel would also review subsidies for localities with atomic power plants as well as functions of related entities such as the Japan Atomic Energy Agency.[50]

On 27 November, after a visit to the plant, nuclear disaster minister Goshi Hosono said that scrapping the Monju-fast-breeder reactor was an option that would be given serious thought. Politicians and private sector experts of the ruling Democratic Party of Japan made proposals for a thorough operational and budgetary review in the government's energy policy screening session earlier in the week before his visit.[51]

On 21 December 2016, the Japanese government confirmed the closure and decommissioning of the Monju reactor, with the suggestion that this would cost at least ¥375 billion.[52] The decommissioning of Monju is planned to take 30 years.[8][53] The Japanese regulator, the Nuclear Regulation Authority, accepted the plan in March 2018. The phases of the plan are:[54]

  1. transfer spent fuel to on-site storage pool by 2022 (completed 13 October 2022[55])
  2. liquid sodium coolant extracted
  3. equipment dismantled
  4. reactor building demolished and removed by 2047

Other FBR programs in Japan[editar | editar código-fonte]

Despite its intention to close the Monju facility, the Cabinet appeared to reaffirm its commitment to a fast breeder program of some kind, essential if Japan's stockpile of some 50 tonnes of plutonium is to be disposed of.[56]

Jōyō is a test fast breeder reactor located in Ōarai, Ibaraki. The reactor was built in the 1970s for the purpose of experimental tests and the development of FBR technologies.

The successor to Monju was expected to be a larger demonstration plant to be completed around 2025, built by the newly formed Mitsubishi FBR Systems company.[57] However, in 2014 Japan agreed to cooperate in developing the emergency reactor cooling system, and in a few other areas, with the French ASTRID demonstration sodium-cooled fast breeder reactor, which was subsequently cancelled in August 2019.[58][59][60] As of 2016, France was seeking the full involvement of Japan in the ASTRID development.[59][61]

See also[editar | editar código-fonte]

Referências

  1. ↑ «Time to shutter Monju». The Japan Times. 25 February 2014. Consultado em 4 May 2015  Verifique data em: |acessodata=, |data= (ajuda)
  2. ↑ «Basic specifications». Consultado em 16 de maio de 2013. Cópia arquivada em 23 de janeiro de 2013 
  3. ↑ a b Tsutomu Yanagisawa (4 March 2011). «Monju, modified». Nuclear Engineering International. Consultado em 28 January 2012. Cópia arquivada em 30 January 2013  Verifique data em: |acessodata=, |arquivodata=, |data= (ajuda)
  4. ↑ TABUCHI, HIROKO (June 17, 2011). «Japan Strains to Fix a Reactor Damaged Before Quake». The New York Times  Verifique data em: |data= (ajuda)
  5. ↑ Kyodo News, "Monju costs far surpass usual nukes", Japan Times, 4 July 2012, p. 3
  6. ↑ Dennis Normile (21 September 2016). «Japan likely to scrap experimental nuclear power reactor». Science. Consultado em 3 December 2016  Verifique data em: |acessodata=, |data= (ajuda)
  7. ↑ «Japan cancels failed $9bn Monju nuclear reactor». BBC. 21 December 2016. Consultado em 23 December 2016  Verifique data em: |acessodata=, |data= (ajuda)
  8. ↑ a b «Japanese government says Monju will be scrapped». World Nuclear News. 22 December 2016. Consultado em 23 December 2016  Verifique data em: |acessodata=, |data= (ajuda)
  9. ↑ «Japan closes Ohi 1&2 and Monju». Nuclear Engineering International. 29 December 2017. Consultado em 29 December 2017  Verifique data em: |acessodata=, |data= (ajuda)
  10. ↑ «Laka foundation: INES 1 - Secondary sodium leakage in the prototype fast breeder reactor Monju». Consultado em 18 de novembro de 2021. Cópia arquivada em 18 de novembro de 2021 
  11. ↑ https://www.env.go.jp/en/chemi/rhm/basic-info/1st/pdf/basic-1st-06-02-04.pdf Predefinição:Bare URL PDF
  12. ↑ POLLACK, ANDREW (February 24, 1996). «REACTOR ACCIDENT IN JAPAN IMPERILS ENERGY PROGRAM». New York Times  Verifique data em: |data= (ajuda)
  13. ↑ wise-paris.org Sodium Leak and Fire at Monju
  14. ↑ Reuters (14 de janeiro de 1996). «Japanese Suicide Linked To Nuclear Plant Leak (Published 1996)». The New York Times (em inglês). ISSN 0362-4331. Consultado em 6 de dezembro de 2020 
  15. ↑ World Nuclear News. Monju enters extended testing. Aug 31, 2007.
  16. ↑ Reuters. Japan fast-breeder reactor may restart in Feb. Aug 12, 2009.
  17. ↑ The Yomiuri Online. Monju reactor clears hurdle to restart. Feb 23, 2010. [ligação inativa]
  18. ↑ The Denki Shinbun. First step toward resuming test operation of Monju.[ligação inativa] Feb 26, 2010. [ligação inativa]
  19. ↑ «Monju nuclear reactor reaches criticality after 14-year shutdown». The Mainichi Daily News. 8 May 2010. Cópia arquivada em 10 de maio de 2010  Verifique data em: |data= (ajuda)
  20. ↑ 高速増殖原型炉もんじゅ燃料交換片付け作業中における炉内中継装置の落下について（中間報告） (PDF). Turuga Head Office, JAEA (em Japanese). 1 October 2010. Consultado em 14 March 2011  Verifique data em: |acessodata=, |data= (ajuda)
  21. ↑ もんじゅ、装置回収また中断　ふたに引っ掛かる？ Arquivado em 2011-08-01 no Wayback Machine. October 14, 2010.
  22. ↑ a b The Mainichi Daily News. Agency gears up to retrieve device fallen inside Monju reactor. May 24, 2011. Arquivado em junho 7, 2011, no Wayback Machine
  23. ↑ Fallen device retrieved from Japan fast-breeder reactor June 23, 2011.
  24. ↑ The Mainichi Shimbun (08 June 2013) Monju reactor's sodium heater temporarily halted by error
  25. ↑ Japan Atomic Energy Agency: Board of directors board of directors June 2013
  26. ↑ The Mainich Shimbun (31 May 2013) Matsuura named to head Japan Atomic Energy Agency Arquivado em 2013-07-02 na Archive.today
  27. ↑ The Mainichi Shimbun (22 June 2013) Monju operator skipped inspections of another 2,300 devices Arquivado em 2013-06-30 no Wayback Machine
  28. ↑ «Falsified inspections suspected at Monju fast-breeder reactor». The Japan Times. 11 April 2014. Consultado em 4 May 2015  Verifique data em: |acessodata=, |data= (ajuda)
  29. ↑ «More maintenance flaws found at Monju reactor». The Japan Times. 26 March 2015. Consultado em 4 May 2015  Verifique data em: |acessodata=, |data= (ajuda)
  30. ↑ The Mainichi Daily News (17 February 2012)Monju fast breeder reactor's sodium detector hits trouble Arquivado em 2012-02-17 no Wayback Machine
  31. ↑ Japan Today (2 May 2013) Black smoke detected from Monju reactor during test operations
  32. ↑ The Mainichi Shimbun (16 September 2013) Data transmission from Monju reactor stopped Arquivado em 2013-09-19 no Wayback Machine
  33. ↑ The Mainichi Shimbun (3 August 2016) もんじゅ 規定違反　水質悪化の警報、半年間放置
  34. ↑ JAIF (26 September 2011) Earth-quake-report 217: Japan to freeze fast-breeder reactor project Arquivado em 2012-01-03 no Wayback Machine
  35. ↑ JAIF(September 29, 2011)Earthquake-report 219: Japan to postpone test to restart Monju reactor Arquivado em 2011-10-28 no Wayback Machine
  36. ↑ Asahi Shinbun Fukui local edition (July 4 2012) Arquivado em 2012-07-12 no Wayback Machine
  37. ↑ The Mainichi Shimbun (13 May 2013) Nuclear authority not to allow restart of Monju reactor Arquivado em 2013-06-17 no Wayback Machine
  38. ↑ The Mainichi Shimbun(17 May 2013)Monju reactor unlikely to resume operations by next March: JAEA Arquivado em 2013-06-18 no Wayback Machine
  39. ↑ The Mainichi Shimbun (17 May 2013) Head of operator of trouble-plagued fast-breeder reactor resigns Arquivado em 2013-07-02 na Archive.today
  40. ↑ NHK-world (20 November 2011) Govt panel seeks to revise nuclear projects Arquivado em 2011-11-20 no Wayback Machine
  41. ↑ «Japan to abandon troubled fast breeder reactor». phys.org, Agence France-Presse (AFP). 7 February 2014. Consultado em 24 July 2014. Cópia arquivada em 29 July 2014  Verifique data em: |acessodata=, |arquivodata=, |data= (ajuda)
  42. ↑ «Monju may be relegated to site for waste radiation-reduction studies». The Japan Times. 7 February 2014. Consultado em 9 February 2014  Verifique data em: |acessodata=, |data= (ajuda)
  43. ↑ «Monju to stop restart». fukushima-is-still-news.over-blog.com/. 30 May 2013. Consultado em 28 July 2014. Cópia arquivada em 10 August 2014. Monju operator ordered to stop restart preparation, Regulators effectively ban Monju reactor from restarting  Verifique data em: |acessodata=, |arquivodata=, |data= (ajuda)
  44. ↑ «Lifting of Monju operation ban uncertain - News - NHK WORLD - English». Consultado em 4 de março de 2015. Cópia arquivada em 2 de abril de 2015 
  45. ↑ The Mainichi Shimbun (5 March 2012)Fault under Tsuruga nuclear plant could trigger M7.4 quake: research Arquivado em 2012-03-07 no Wayback Machine
  46. ↑ The Mainichi Shimbun (7 March 2012) Quake severity estimate for Tsuruga nuclear plant to be reassessed Arquivado em 2012-03-08 no Wayback Machine
  47. ↑ The Mainichi Shimbun (19 July 2013) Govt's nuclear fuel cycle policy teeters on edge as onsite Monju inspection completed Arquivado em 2013-07-21 na Archive.today
  48. ↑ The MainichiShimbun (17 July 2013) Panel starts investigation on geologic faults at Monju reactor site Arquivado em 2013-07-17 na Archive.today
  49. ↑ The Mainichi Shimbun (19 July 2013) Conclusion on faults under Monju reactor will take time: survey team Arquivado em 2013-07-19 na Archive.today
  50. ↑ Mainichi Japan (22 October 2011) Gov't cost-cutting unit to study Monju reactor's abolition Arquivado em 2011-10-22 no Wayback Machine
  51. ↑ The Mainichi Daily News (28 November 2011) Gov't to consider scrapping of Monju reactor as option: Hosono Arquivado em 2011-12-01 no Wayback Machine
  52. ↑ «Monju prototype reactor, once a key cog in Japan's nuclear energy policy, to be scrapped». The Japan Times. 21 December 2016. Consultado em 27 December 2016  Verifique data em: |acessodata=, |data= (ajuda)
  53. ↑ «Monju decommissioning plan approved». World Nuclear News. 16 June 2017. Consultado em 20 June 2017  Verifique data em: |acessodata=, |data= (ajuda)
  54. ↑ «Regulator approves Monju decommissioning plan». World Nuclear News. 28 March 2018. Consultado em 30 March 2018  Verifique data em: |acessodata=, |data= (ajuda)
  55. ↑ «Defuelling completed at Japan's Monju reactor». World Nuclear News. 21 October 2022. Consultado em 23 October 2022  Verifique data em: |acessodata=, |data= (ajuda)
  56. ↑ «Japan to scrap troubled ¥1 trillion Monju fast-breeder reactor». Japan Times. 21 September 2016. Consultado em 29 de setembro de 2016  Verifique data em: |data= (ajuda)
  57. ↑ «New fast breeder reactor for Japan». Nuclear Engineering International. 6 June 2006. Consultado em 16 March 2011. Cópia arquivada em 13 June 2011  Verifique data em: |acessodata=, |arquivodata=, |data= (ajuda)
  58. ↑ Tara Patel, Gregory Viscusi (5 May 2014). «Japan to Work With France on Future Fast-Breeder Atomic». Bloomberg. Consultado em 3 December 2016  Verifique data em: |acessodata=, |data= (ajuda)
  59. ↑ a b «France wants Japan to share 570 billion yen ASTRID reactor development cost». The Mainichi. 22 October 2016. Consultado em 3 December 2016  Verifique data em: |acessodata=, |data= (ajuda)
  60. ↑ Geert De Clercq (30 August 2019). «France drops plans to build sodium-cooled nuclear reactor». Reuters. Consultado em 15 January 2022  Verifique data em: |acessodata=, |data= (ajuda)
  61. ↑ «Ministries spar as Japan focuses on fast reactor project in France». The Asahi Shimbun. 22 September 2016. Consultado em 3 December 2016  Verifique data em: |acessodata=, |data= (ajuda)
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