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Tazaki, Makiko; Tamai, Hiroshi; Shimizu, Ryo; Kimura, Takashi; Kitade, Yuta; Nakanishi, Hiroaki; Suda, Kazunori
Nihon Kaku Busshitsu Kanri Gakkai Dai-39-Kai Nenji Taikai Rombunshu (Internet), 7 Pages, 2018/11
no abstracts in English
Suda, Kazunori
Enerugi Rebyu, 38(10), p.38 - 41, 2018/09
no abstracts in English
Tazaki, Makiko; Suda, Kazunori; Shimizu, Ryo; Tamai, Hiroshi; Kitade, Yuta
Nihon Kaku Busshitsu Kanri Gakkai Dai-38-Kai Nenji Taikai Rombunshu (Internet), 9 Pages, 2018/04
no abstracts in English
Tazaki, Makiko; Shimizu, Ryo; Suda, Kazunori
JAEA-Review 2016-019, 118 Pages, 2016/10
JAEA-Review-2016-019.pdf:4.73MB
In November 2015, the new nuclear cooperation agreement between US and ROK entered into force. A top priority of their negotiation for revising their old agreement was whether or not the US grants its advanced consent to the ROK engagement in uranium enrichment and pyroprocessing of US-origin nuclear material. Under the new agreement, in principle, the ROK is able to conduct uranium enrichment and reprocessing at certain facilities prescribed in Annexes III and II to the Agreed Minute of the new agreement. However, as of the date of validation of the agreement, no facilities are prescribed in both Annexes. It means that the US does not grant its advanced consent to ROK such activities. The new agreement allows the US adherence of its nuclear nonproliferation policy, while it also allows ROK future possibility of engaging such activities. Such result can be analyzed that the new agreement was a product of reality-based and maximal compromise among the US and ROK.
Kokaji, Lisa; Suda, Kazunori; Tamai, Hiroshi; Tazaki, Makiko; Shimizu, Ryo
Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Dai-36-Kai Nenji Taikai Rombunshu (Internet), 7 Pages, 2015/12
After the Cold War, the United States and Russia have been decreasing the number of nuclear warheads under the Strategic Arms Reduction Treaty and other agreements, with step-by step removal from nuclear military programs under the process of nuclear disarmament. In 2000, the two states signed the Plutonium Management and Disposition Agreement (PMDA), which prescribes each of them to dispose of at least 34 metric tons of plutonium. Recently, since the cost of constructing the Mixed Oxide (MOX) Fabrication Facility has increased significantly, the United States has been assessing alternatives. In the revised PMDA, which defines weapon-grade plutonium as "an isotopic ratio of plutonium 240 to plutonium 239 of no more than 0.10", Article VII states, "Each Party shall have the right to conduct and the obligation to receive and facilitate monitoring and inspection activities", and Article VIII prescribes, "Each Party shall be responsible...for...disposition plutonium...taking into account...INFCIRC/225/Rev.4...". In accordance with the revised PMDA's obligation to dispose of an excess of 34 metric tons of plutonium, irradiation in fast reactors, irradiation of MOX fuel in LWRs, immobilization, downblending, and deep borehole options have been considered by the United States. In this research, it is examined how these options could be implemented from the nuclear nonproliferation and nuclear security perspectives.
Yanagisawa, Kazuaki; Kume, Tamikazu; Makuuchi, Keizo; Tagawa, Seiichi*; Chino, Mitsuo*; Inoue, Tomio*; Takehisa, Masaaki*; Hagiwara, Miyuki*; Shimizu, Masahiko*
Journal of Nuclear Science and Technology, 39(10), p.1120 - 1124, 2002/10
Times Cited Count：3 Percentile：23.39(Nuclear Science & Technology)no abstracts in English
Makuuchi, Keizo; Tagawa, Seiichi*; Kashiwagi, Masayuki*; Kamada, Toshimitsu*; Sekiguchi, Masayuki*; Hosobuchi, Kazunari*; Tominaga, Hiroshi*; Ooka, Norikazu
Journal of Nuclear Science and Technology, 39(9), p.1002 - 1007, 2002/09
Times Cited Count：6 Percentile：39.48(Nuclear Science & Technology)no abstracts in English
Takahashi, Shoji
JAERI-Review 2002-020, 19 Pages, 2002/08
JAERI-Review-2002-020.pdf:1.27MB
no abstracts in English
Kume, Tamikazu
Hoshasen To Sangyo, (92), p.61 - 70, 2001/12
no abstracts in English
Tsujimura, Norio; Shinohara, Kunihiko; Momose, Takumaro
PNC TN8510 98-001, 13 Pages, 1998/07
None
Kimura, Haruyuki
Purazuma, Kaku Yugo Gakkai-Shi, 72(2), p.170 - 171, 1996/02
no abstracts in English
; Uchiyama, Junzo; Sato, Hiroshi
Dai-17-Kai Kaku Busshitsu Kanri Gakkai Nihon Shibu Nenji Taikai Rombunshu, 0, p.1 - 4, 1996/00
no abstracts in English
Watanabe, Norio
Nihon Genshiryoku Gakkai-Shi, 38(4), p.252 - 261, 1996/00
no abstracts in English
PNC TN9000 94-006, 60 Pages, 1994/07
Main features were studied about an objective deep sea reactor, which will be used as an electric power source at an unmanned deep sea base. The main features determined are as follows. [Thermal power 190 kWt, Fuel Mixed nitride, Cladding material Hasteloy N, Structual material Type 316 Stainless Steel, Coolant NaK, Core height and diameter about 25cm both, Reactor vessel outlet/inlet temperature 605/ 505
C, Operation term 10 years.] Some topic subjects of a talk during deep sea reactor research were studied like follows. Availability of electric transmission from the land or a ship is as follows. (1)The electric transmission from the land is limited up to 1,000m in the depth of water and 100km in the distance from the land. (2)The electric transmission from a ship is available only in the days when the sea is calm. Therefore these transmission methods can not be used as the power source for the base. Concerning reliability, reliability analysis were performed about the part of Closed Brayton Cycle Systems of the reactor. Success probability calculated on the part was 0.999942 in the case of continuous four years operation at 20 kWe. Concerning safety, radioactivity contained in the reactor was calculated. The radioactivity was about 1/50,000 of the radioactivity thrown away in the north Atlantic Ocean from 1962 to 1982. Concerning the experience of developping a NaK cooling reactor in U.S., no anormaly was reported to be found in fuel pins and a reactor vessel after about 400 days operation under a reactor outlet temperature condition over about 527C in the test of a ground test reactor FS-3 for SNAP-10A about thirty years ago.
Sawamura, Sadashi*
PNC TJ1600 94-002, 61 Pages, 1994/02
None
Shirai, Eiji; Soyama, Kazuhiko
Genshiryoku Kogyo, 39(11), p.48 - 53, 1993/00
no abstracts in English
Genshiryoku Kogyo, 38(4), p.61 - 63, 1992/04
no abstracts in English
