Showing posts with label Monju. Show all posts
Showing posts with label Monju. Show all posts

Japan's Minister of Education Visits Monju, Says Fast Breeder Is Necessary for Japan

Diposkan oleh Pengetahuan dan Pengalaman on Thursday, August 4, 2011

Minister of Education and Science Yoshiaki Takagi, a former union official at a shipyard in Nagasaki before he ran for office, visited Monju, the troubled fast breeder reactor in Tsuruga City in Fukui Prefecture where Governor Nishikawa may be jockeying for an advantageous position vis a vis the national government on the Hokuriku Shinkansen (bullet train) project and opposing the re-start of the reactors in his prefecture.

From Nikkei Shinbun (8/3/2011):

高木義明文部科学相は3日、高速増殖炉「もんじゅ」(福井県敦賀市)を視察し、東京電力福島第1原発の事故を踏まえた安全対策の実施状況を確認した。

Minister of Education and Science Yoshiaki Takagi visited Fast Breeder Reactor "Monju" in Tsuruga City, Fukui Prefecture to be briefed on the implementation of safety measures after the Fukushima I Nuclear Power Plant accident.

 視察後に記者団の取材に応じた高木文科相は、「ウラン燃料を有効に使い、廃棄物をより少なくする研究開発は資源の乏しい日本に適している」と高速増殖炉開発の意義を強調した。一方で今後の開発方針は「政府のエネルギー・環境会議で、再生可能エネルギーの普及状況などをしっかり議論をする中で方向性が出てくる」と明言を避けた。

After the visit, the minister gave comments to the press, "Research and development to find ways to use uranium fuel more effectively and to reduce nuclear waste is a natural fit for Japan, which has scarce natural resources", emphasizing the importance of developing a fast breeder reactor. However, he avoided specifics of the future development policy and said "it will be made clear through the discussion of renewable energy in the government's energy and environmental committees".

 高木文科相は7月15日午前の閣議後の記者会見で、もんじゅについて開発中止を含めて検討する考えを示唆した後、同日夕に発言を事実上撤回した。

Minister Takagi hinted at discontinuing the development of Monju during the press conference after the cabinet meeting on July 15 morning, but effectively withdrew his comment in the evening of the same day.

Since Sellafield is closing its MOX-fuel plant specifically designed for the Japanese nuclear industry due to uncertain prospect after the Fukushima accident, Monju will be needed more than ever, if it ever succeeds in running for more than a few weeks.

Or the new generation of fast breeder reactor, to be built by Mitsubishi FBR Systems, which was set up by Mitsubishi Heavy Industries in 2007. Mitsubishi Heavy Industries was selected by the government (Ministry of Education and Science, Ministry of Economy, Trade and Industries) and the Federation of Electric Power Companies as the core company to develop the next generation fast breeder reactor in 2006.

There is no "free market" for the nuclear industry.

(In case you are wondering why the Ministry of Education is involved in nuclear power, it's because the Ministry absorbed the Science and Technology Agency in 2001. The Science and Technology Agency was set up as an independent agency under the Prime Minister's Office in 1956, for the express purpose of promoting nuclear energy in Japan. Its first head was Matsutaro Shoriki, "father of Japan's nuclear energy" who was also the owner of Yomiuri Shinbun and Nippon Television Network.)

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Monju: The In-Vessel Transfer Machine Has Been Pulled Out

Diposkan oleh Pengetahuan dan Pengalaman on Thursday, June 23, 2011

3rd time charm.

The Japan Atomic Energy Agency who runs the Monju Fast Breeder Reactor announced the In-Vessel Transfer Machine (IVTM) was successfully pulled out of the reactor at 4:55AM JST on June 24.
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Monju: Pull-Out of In-Vessel Transfer Machine Still On-Going

Diposkan oleh Pengetahuan dan Pengalaman

(UPDATE: The technical glitch that delayed the start of the operation was a argon gas leak at the bottom of the container that would hold the IVTM as it was being pulled out of the reactor. Argon gas fills the reactor to prevent air from entering the sodium-cooled reactor. Information from Fukui Shinbun.)

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The attempt to remove the 3.3-ton In-Vessel Transfer Machine from the Monju fast breeder reactor was supposed to start in the morning of June 23 JST, and the operation was supposed to be over by now (3:00AM JST on June 24). However, some technical glitches delayed the start, and the Japan Atomic Energy Agency (JAEA) who runs the reactor decided to halt the operation until June 23 night.

From Fukui Shinbun, local newspaper in Fukui Prefecture where Monju sits (5:59PM JST 6/23/2011):

高速増殖炉「もんじゅ」(福井県敦賀市)で原子炉容器内に炉内中継装置が落下したトラブルをめぐり、日本原子力研究開発機構が23日午後に行う予定の引き抜き作業は、機器類の調整などに手間取り、夜以降にずれ込んだ。同日中に作業が始まり順調に進めば、翌24日午前には回収を終える見通し。

The operation to pull out the In-Vessel Transfer Machine from the Monju Fast Breeder Reactor, which was scheduled to commence in the afternoon of June 23 was delayed till after the nightfall due to delay in preparing the necessary equipment for the operation. If the operation starts sometime on June 23 and everything goes smoothly, the IVTM will be out of the reactor sometime in the morning of June 24.

The operation is supposed to last for 8 to 9 hours.

According to the press release from the JAEA, the operation finally started at 8:50PM JST on June 23. There is no explanation of the cause of the delay. The press release has one picture of the operation, taken at 9:30PM:

There have been doubts expressed whether the operation is technically feasible.

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Monju: They Will Try to Pull Out the In-Vessel Transfer Machine on June 23

Diposkan oleh Pengetahuan dan Pengalaman on Wednesday, June 22, 2011

(UPDATE: Operation started late, and it is still on-going as of 11:24AM Pacific Standard Time in the US. See my post.)

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The 3.3-ton In-Vessel Transfer Machine (IVTM) dropped back inside the Reactor Vessel of Monju Fast Breeder Reactor in August last year, when they were finishing up on exchanging the fuel rods. The past 2 attempts to pull out the IVTM were unsuccessful.

This time, by removing the "sleeves" (part of the lid) with the 12-meter-long IVTM, they think they can pull the whole thing out and without any air entering the reactor.

According to Fukui Shinbun (6/22/2011), they will pull out very slowly (6 centimeters/minute), and the entire process is expected to last 8 to 9 hours.

The coolant of this reactor is sodium, which burns on contact with air. The reactor uses MOX-fuel.

Information from Monju site on how to pull out the In-Vessel Transfer Machine (blue rod in the diagram):


TV Asahi did a documentary on Monju in June, in which you get to see the inside of Monju:


増殖炉事故 [もんじゅ] 現場で何が・・・内部取材 by sean2010jp

About 3 minutes and 30 seconds into the documentary, a local councilman shouts at the Monju operators after the sodium leak and fire accident in 1995: "A courage to climb the mountain? You need a courage to quit, you idiot!"

About 10 minutes into the documentary, you get to see the inside of the Containment Vessel of Monju. Brightly lit, cavernous hall. We cannot assume the safety of the reactor, but if there is no radiation leak, it means it is safe, says the engineer.

17, 18 minutes into the documentary, you see the public buildings built by Tsuruga City with the money from the government for having nuclear reactors. The documentary then shows the local fishermen reluctant to say anything about Monju. One elderly man says "Safe, of course it's safe." One elderly woman says "I can't answer anything", when asked about the nuclear accident in Fukushima.

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