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Journal Articles

Development of waste acceptance criteria and current challenges relating to the disposal project of LLW generated in research, medical and industrial facilities

Nakata, Hisakazu; Amazawa, Hiroya; Izumo, Sari; Okada, Shota; Sakai, Akihiro

Dekomisshoningu Giho, (58), p.10 - 23, 2018/09

Low level radioactive wastes are generated in the research and development of the nuclear energy, medical and industrial use of radioisotope except NPP in Japan. The disposal of wastes arising from NPP has already been implemented while not the one for wastes from research institutes etc. Japan Atomic Energy Agency therefore has been assigned an implementing organization for the disposal legally in 2008 in order to promote the disposal program as quickly and firmly as possible. Since then, JAEA has conducted their activity relating to the disposal facility design on generic site conditions and developing Waste Acceptance Criteria for LLW from research institutes. This report summarizes the WAC and current challenges.

Journal Articles

Topical understanding of nuclear material measurement$$cdot$$accountancy and quality assurance

Kikuchi, Masahiro*; Muraoka, Susumu*; Osabe, Takeshi*; Terada, Hiromi; Shimizu, Kenichi; Otani, Tetsuo*; Fujimaki, Kazunori*; Ishikawa, Tadatsugu*; Shinohara, Yoshinori*

Dai-23-Kai Kaku Busshitsu Kanri Gakkai Nippon 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.

JAEA Reports

The development of mass balance estimation code; The development and the analyzed example with object type code(I)

;

JNC-TN9400 2000-034, 48 Pages, 2000/03

JNC-TN9400-2000-034.pdf:1.56MB

The study and the development to put FBR (Fast Breeder Reactor) to practical use have been doing. So many kinds of technologies are investigated to construct nuclear fuel recycle received to the society. The most important aim of reprocessing has been to extract U and Pu from spent fuels effectively, but, now, the demands for reprocessing are many kinds on nuclear fuel recycle system's construction. These need to be accepted sufficiently. The system that consists of electrolysis, extraction, with molten salt and melting metal, volatilization and condensation using the difference of vapor pressure is suggested, because, differently from LWR (Light Water Reactor), FBR can use the low decontamination factor's fuel. When the engineering scale plant is designed, the dry reprocessing has unsolved problems(ex. process flow) because of less demonstrative scale plants of the dry reprocessing than ones of the wet reprocessing. So the analysis and the estimation of mass balance that is most fundamental in the dry reprocessing system's design need to keep up with the system's alteration (to add new processes etc.) flexibly. This study aim is to develop the mass balance estimation code of dry reprocessing that satisfies the demand mentioned above.

JAEA Reports

None

PNC-TJ8164 96-010, 213 Pages, 1996/03

PNC-TJ8164-96-010.pdf:7.67MB

no abstracts in English

JAEA Reports

None

; ;

PNC-TN2410 93-017, 107 Pages, 1993/05

PNC-TN2410-93-017.pdf:12.88MB

None

JAEA Reports

None

; ; ; *; ; ; *

PNC-TN8470 93-015, 311 Pages, 1993/03

PNC-TN8470-93-015.pdf:6.85MB

no abstracts in English

JAEA Reports

None

; ; ; *; ; ; *

PNC-TN8470 93-014, 72 Pages, 1993/03

PNC-TN8470-93-014.pdf:2.05MB

no abstracts in English

JAEA Reports

None

; ;

PNC-TN8420 92-017, 102 Pages, 1992/09

PNC-TN8420-92-017.pdf:3.28MB

None

JAEA Reports

Real Time Item Accounting System(RIAS) of Spent Fuel at the Receiving and Storage Areas

Ogata, Yoshiaki; Ochiai, Kazuya; ; ;

PNC-TN8410 91-276, 76 Pages, 1991/11

PNC-TN8410-91-276.pdf:2.09MB

None

Oral presentation

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