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Esaka, Fumitaka; Sakurai, Satoshi
Kaku Busshitsu Kanri Senta Nyusu, 33(11), p.9 - 12, 2004/11
no abstracts in English
Usuda, Shigekazu
Kaku Busshitsu Kanri Senta Nyusu, 32(10), p.5 - 6, 2003/10
no abstracts in English
accountancy and quality assuranceKikuchi, Masahiro*; Muraoka, Susumu*; Osabe, Takeshi*; Terada, Hiromi; Shimizu, Kenichi; Otani, Tetsuo*; Fujimaki, Kazunori*; Ishikawa, Tadatsugu*; Shinohara, Yoshinori*
Dai-23-Kai Kaku Busshitsu Kanri Gakkai Nihon Shibu Nenji Taikai Rombunshu, p.91 - 98, 2002/12
Nuclear material measurement is an important measure to determine the amount of nuclear material of each stage such as receipt, shipment, inventory and hold-up. The material accountancy based on the material balance among the measurements is a measure to control of nuclear material. The material accountancy, from its technical aspect, can be used as promising measures for purposes from operator's level to state's level such as the nuclear safety, property control and environmental preservation other than safeguards measures only to conclude no diversion of nuclear material. This paper discusses various purposes of nuclear material measurements and clarifies the certain function to be expected at each purpose. Based on the discussion, critical points for the quality assurance of each stage are studied.
Morimoto, Kyoichi; Shibata, Atsuhiro; Shigetome, Yoshiaki
JNC TN8200 2001-006, 19 Pages, 2001/12
JNC-TN8200-2001-006.pdf:0.92MB
Global2001 (International Conference: "Back-End of the Fuel Cycle: From Research to Solutions ") was held for six days from September 9 to September 14 in Paris in France. In this year, there were about 420 participants from each country and about 70 people participated from Japan. This conference consisted of the reactor and fuel cycle field, the reprocessing field, the disposal field, and the non-proliferation field, etc. The main topics of this conference were the back end of the nuclear fuel cycle, the management of long-lived nuclide, the advanced concept of reactor and fuels. Advanced fuel recycle technology division reported about the feasibility study on commercialized FR cycle systems, the nuclear fuel and the reprocessing process in the oral session and poster session. Each report was audited and information was collected. It is possible to refer to information on Global2001 by the following homepages. http://www.cea.fr/conferences/global2001 /index.him*
Osabe, Takeshi*; Usuda, Shigekazu
Kaku Busshitsu Kanri Senta Nyusu, 29(10), p.5 - 9, 2000/10
no abstracts in English
; ; *; *; *; *; *
JNC TN8440 2000-013, 179 Pages, 2000/04
JNC-TN8440-2000-013.pdf:10.31MB
The plutonium conversion development facility (PCDF) has been operated for 17 years and about 12 tons plutonium-uranium mixed oxide (MOX) powder has been converted since operation started in 1983. The first maintenance program for aging of apparatus was carried out from 1993 to 1994. The calcination-reduction fumace, liquid waste evaporator had been dismantled and renewed. The second maintenance program was carried out form 1998 to 1999. The microwave ovens, powder blender, ventilation control panel and so on were dismantled and renewed. Large volume radioactive wastes were generated during this maintenance such as the furnace, the filter casings and glove boxes. These wastes were too large to be packed into the waste container and these wastes were polluted by MOX powder unfixed on these surface. SO cutting and packing operation for these wastes and recovery of MOX powder from them were carried out. In this report, the method of this cutting and packing operation, the radioactive exposure to the operators in this operation, the estimation of nuclear material quantity migrated to filters, the evaluation of re-floating factor of radioactive material, etc. were discussed.
Nuclear Non-Proliferation Study Group*; *; Iwata, Shuichiro*; *; *; *;
JNC TN1400 2000-008, 81 Pages, 2000/04
JNC-TN1400-2000-008.pdf:3.44MB
no abstracts in English
Mochiji, Toshiro;
JNC TN1450 2000-001, 122 Pages, 2000/03
JNC-TN1450-2000-001.pdf:6.39MB
no abstracts in English
*; *; *
JNC TJ8420 2000-003, 99 Pages, 2000/03
JNC-TJ8420-2000-003.pdf:5.47MB
no abstracts in English
Yamada, Susumu*
JNC TJ8400 2000-051, 122 Pages, 2000/02
JNC-TJ8400-2000-051.pdf:2.15MB
Developing an inexpensive on-line criticality surveillance system is required for ensuring the safety of nuclear fuel reprocessing plants. Based on the series of researches for five years, R&D study on On-line Criticality Surveillance System has been carricd out since 1996. The concept of this Criticality Surveillance System is based on the Auto-Regressive Moving Average (ARMA) model identification algorithms to the time series of signal fluctuation of a neutron detector. We have proposed several new ideas of modification to the original design of the Criticality Surveillance System, and also reported some results of numerical analysis over the DCA experiments. In those days, DOS/V personal computers with Microsoft Windows have came into wide use instead of those based on the MS-DOS, which have been popular in Japan. NEC, a major maker of MS-DOS computers, stopped the production of MS-DOS computers and changed their management policy toward production of DOS/V personal computers. Our researches have been developed using MS-DOS computers. For the effective use of these important results, it became an urgent theme to transplant all programs developed on MS_DOS computers into computers with the OS, which is not easily affected by commercialism. Since the design concept should be based on high reliability, electromagnetic disturbance-free and high expandability, and also computers have achieved remarkably high performance as well as low price in these days, these computers should be used not only as a simple signal processing unit but also a totally integrated signal analyzing system along with conventional signal analyzing software in stead of IC chips with analyzing soft wares. This configuration enables us to easily introduce newly developed techniques and to provide supplement information. Then, this approach can enhance the reliability of the Criticality Surveillance System without addition of any special devices, and also provide the flexibility of ...
Mochiji, Toshiro; ; Tazaki, Makiko
JNC TN1200 99-002, 44 Pages, 1999/03
The 1999 JNC International Forum on the Peaceful Use of Nuclear Energy the Nuclear Fuel Cycle and Nuclear Non-Proliferation Technology, a continuation of the annual International Forum on Nuclear Non-proliferation sponsored by its predecessor organization PNC (Power Reactor and Nuclear Fuel Development Corporation), was held February 22-23, 1999 in Tokyo, Japan. About 380 people from government, industry, and academia involved in nuclear technology and issues attended the forum. A distinguished group of speakers participated in the forum sessions including highly respected technology and policy experts from France, Russia, and the United States. Session themes were: (1) Advanced Nuclear Technology for Peaceful Purposes and Nuclear Non-Proliferation, (2) Transparency Improvements in Nuclear Technology through the Disposition of Excess Nuclear Weapons Plutonium. This document provides a record of speeches and discussion which have no written documentation and summarizes presented papers as appropriate. Full papers prepared by the presenters can be found in The Proceedings of the 1999 JNC International Forum on the Peaceful Use of Nuclear Energy.
Mochiji, Toshiro; ; Tazaki, Makiko
JNC TN1200 99-001, 20 Pages, 1999/03
no abstracts in English
Kaku Busshitsu Kanri Senta Nyusu, 27(6), p.8 - 10, 1998/06
no abstracts in English