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Journal Articles

A Spectroscopic technique for analysis developed in the field of unclear energy

Kusaka, Ryoji

Bunko Kenkyu, 67(6), p.239 - 240, 2018/12

A spectroscopic technique for analysis developed by collaboration between Japan Atomic Energy Agency (JAEA) and Quantum and Radiological Science and Technology (QST) is discussed for readers outside the field of nuclear energy. This paper introduces a quantitative analysis for $$^{107}$$Pd radioisotope contained in a spent nuclear fuel by using laser-induced photoreduction and inductively coupled plasma mass spectrometry (ICP-MS). The importance and problems of quantitative analysis for radioisotopes in spent nuclear fuels are described, and the principle, advantages, and future applications of the spectroscopic technique are discussed.

JAEA Reports

A study on long term stability of bentonite; The preliminary study on the bentonite stability in the groundwater influenced by cementitious material

*; ;

JNC-TN8430 2001-007, 56 Pages, 2002/01

JNC-TN8430-2001-007.pdf:13.13MB

In the geological disposal concept of radioactive wastes, a kind of clay with sorption ability and low permeability, called bentonite, is envisaged as an engineered barrier system in the geological repository. Also, the cemetitious material is envisaged as the backfill material in the vaults and the structure material of the vaults. The groundwater in contact with the cementitious material will promote hyperalkaline conditions in the repository environment and these conditions will affect the performance of the bentonite. Therefore, it is necessary to investigate the interaction between the cementitious material and the bentonite for the evaluation of long term stability of the disposal system. In this study, for the identification and the investigation of the secondary minerals, the batch immersion experiments of the powder bentonite were carried out using synthetic cement leachates (pH=7, 12.5, 14) at 200$$^{circ}$$C. As the results, it was confirmed that Na as exchangeable cations in the bentonite can exchange relatively easily with Ca in the solution from the experiment results. And the ratio of cation exchange was estimated to be about 25% based on the amount of exchangeable cations Ca$$^{2+}$$ between layers. Furthermore, it was concretely shown that the generation of analcime might be affected by the Na concentration from results of the solution analyses and a stability analysis of analcime using the chemical equilibrium model, in addition to the pH in the solution.

Journal Articles

JAERI Takasaki in-air micro-PIXE system for various applications

Sakai, Takuro; Kamiya, Tomihiro; Oikawa, Masakazu*; Sato, Takahiro; Tanaka, Akira*; Ishii, Keizo*

Nuclear Instruments and Methods in Physics Research B, 190(1-4), p.271 - 275, 2001/09

 Times Cited Count:54 Percentile:4.04

no abstracts in English

Journal Articles

Development of analytical techniques for ultra trace amounts of nuclear materials in environmental samples using ICP-MS for safeguards

Magara, Masaaki; Hanzawa, Yukiko; Esaka, Fumitaka; Miyamoto, Yutaka; Yasuda, Kenichiro; Watanabe, Kazuo; Usuda, Shigekazu; Nishimura, Hideo; Adachi, Takeo

Applied Radiation and Isotopes, 53(1-2), p.87 - 90, 2000/07

 Times Cited Count:25 Percentile:14.96

no abstracts in English

Journal Articles

Development of environmental sample analysis techniques for safeguards and its current status

Magara, Masaaki; Hanzawa, Yukiko; Esaka, Fumitaka; Miyamoto, Yutaka; Yasuda, Kenichiro; Tsuruta, Yasuhiro; Tsuda, Shinji; Watanabe, Kazuo; Usuda, Shigekazu; Nishimura, Hideo; et al.

Kaku Busshitsu Kanri Gakkai Nippon Shibu Dai-20-Kai Kinen Taikai Rombunshu, p.183 - 187, 1999/11

no abstracts in English

JAEA Reports

None

Kato, Toshihiro*; ; ; ; ; Takeda, Seiichiro

PNC-TN8410 98-070, 31 Pages, 1998/02

PNC-TN8410-98-070.pdf:0.96MB

None

Journal Articles

Decomposition of prompt $$gamma$$-ray spectra including the Doppler-broadened peak for boron determination

Magara, Masaaki; Yonezawa, Chushiro

Nuclear Instruments and Methods in Physics Research A, 411(1), p.130 - 136, 1998/00

 Times Cited Count:23 Percentile:13.24

no abstracts in English

JAEA Reports

None

; ; ; ; Takeda, Seiichiro;

PNC-TN8410 98-063, 48 Pages, 1997/12

PNC-TN8410-98-063.pdf:1.74MB

None

JAEA Reports

None

; *; ; ; Takeda, Seiichiro

PNC-TN8410 97-104, 56 Pages, 1997/04

PNC-TN8410-97-104.pdf:2.1MB

None

JAEA Reports

None

*

PNC-TJ1309 96-001, 113 Pages, 1996/03

PNC-TJ1309-96-001.pdf:3.42MB

no abstracts in English

JAEA Reports

None

; *; ; ; ; Aose, Shinichi

PNC-TN8410 95-238, 252 Pages, 1995/08

PNC-TN8410-95-238.pdf:12.8MB

None

JAEA Reports

None

PNC-TJ1545 95-001, 150 Pages, 1995/03

PNC-TJ1545-95-001.pdf:5.28MB

no abstracts in English

JAEA Reports

None

PNC-TJ1609 95-002, 34 Pages, 1995/02

PNC-TJ1609-95-002.pdf:1.06MB

no abstracts in English

JAEA Reports

None

; Aose, Shinichi; ; ;

PNC-TN8420 93-014, 25 Pages, 1993/08

PNC-TN8420-93-014.pdf:3.02MB

None

JAEA Reports

None

PNC-TJ1545 93-004, 122 Pages, 1993/03

PNC-TJ1545-93-004.pdf:4.76MB

None

Journal Articles

Irradiation effects on aromatic polymers, 2; Gas evolution during electron-beam irradiation

Hegazy, EI-Sayed A.*; Sasuga, Tsuneo; Nishii, Masanobu; Seguchi, Tadao

Polymer, 33(14), p.2904 - 2910, 1992/00

 Times Cited Count:21 Percentile:32.02

no abstracts in English

JAEA Reports

None

; ; *; *

PNC-TN8410 92-018, 30 Pages, 1991/11

PNC-TN8410-92-018.pdf:0.75MB

None

JAEA Reports

None

; ; ; *; *

PNC-TN8410 91-241, 70 Pages, 1991/08

PNC-TN8410-91-241.pdf:1.1MB

None

JAEA Reports

None

; Wada, Tsutomu; ; ; ; Nagai, Shuichiro

PNC-TN8410 91-201, 94 Pages, 1991/08

PNC-TN8410-91-201.pdf:3.62MB

None

JAEA Reports

Experimental Study on Equilibrium Partition Coefficient of Volatile Fission Products between Liquid Sodium and the Gas Phase

; ; ; ;

PNC-TN9410 91-091, 13 Pages, 1991/01

PNC-TN9410-91-091.pdf:0.31MB

A series of tests has been conducted to obtain gas-liquid equilibrium partition coefficient Kd of volatile fission products such as cesium,iodine,and tellurium in sodium. In the test a sodium pool mixed with an FP simulant was heated by an electric furnace and the solvent of trapped vapors by filters was quantitatively analyzed. The results are,(1)Cs shows the highest Kd (20-100), (2)Kd of iodine scatters as wide as 0.02-0.5at 450$$^{circ}C$$and 0.3-0.8 at 650$$^{circ}C$$,(3)the Kd values of Cs and I agree well with the theoretical ones reported by Castleman et al., and (4)if a sodium-telluride which is hard to vaporize than pure Te is assumed, measured Kd of Te agrees with that theoretical.

25 (Records 1-20 displayed on this page)