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JAEA Reports

Evaluation of neutronic characteristics of STACY 80-cm-diameter cylindrical core fueled with 6% enriched uranyl nitrate solution

Yanagisawa, Hiroshi; Sono, Hiroki

JAERI-Tech 2003-057, 39 Pages, 2003/06

JAERI-Tech-2003-057.pdf:2.76MB

no abstracts in English

JAEA Reports

Evaluation of soluble organic compounds generated by radiological degradation of asphalt

Fukumoto, Masahiro; Nishikawa, Yoshiaki*; Kagawa, Akio; Kawamura, Kazuhiro

JNC TN8400 2001-002, 23 Pages, 2000/12

JNC-TN8400-2001-002.pdf:0.55MB

The soluble organic compounds generated by radiological degradation of asphalt ($$gamma$$ ray) were confirmed as a part of influence of the bituminized waste degradation in the TRU waste repository. Especially, the influence of the nitrate was focused on. As a result, the concentration of the soluble organic compounds generated by radiological degradation of asphalt (10MGy, $$gamma$$ ray which is correspond to absorbed dose of asphalt for 1,000,000 years) were lower (each formic acid : about 50mg/dm$$^{3}$$, acetic acid : about 30mg/dm$$^{3}$$ and oxalic acid : about 2mg/dm$$^{3}$$) than that of the formic acid, the acetic acid and the oxalic acid which Valcke et al. had shown (the influence of the organic at the solubility examination which uses Pu and Am). Moreover, the change in the concentration of TOC and the soluble organic compounds (formic acid, acetic acid and oxalic acid) is little under the existence of nitrate ion. That is, the formic acid and acetic acid which can be organic ligands were generated little by oxidative decomposition of asphalt in the process that nitrate ion becomes nitrite ion by radiation. The influence of the soluble organic compounds by the radiological degradation of the asphalt ($$gamma$$ ray) on adsorption and solubility by the complexation of radionuclides in the performance assessment can be limited.

JAEA Reports

Nuclear waste glass alteration in silica saturated solution depth profiling by ERDA and ESCA for simulated nuclear waste/ glass

; Kubota, Mitsuru*; *; *

JNC TN8430 98-001, 12 Pages, 1998/11

JNC-TN8430-98-001.pdf:0.87MB

Leaching experiments were performed with simulated nuclear waste glasses in silica saturated water at 90$$^{circ}$$C for periods of 28 days in order to clarify the alteration mechanism of waste glass under silica saturation. After leaching experiments, the depth profiles of some elements of glass surfaces were measured by ERDA and ESCA. Depth profiles of H and soluble elements, such as B and Na, for the simulated nuclear waste glass after leaching experiments demonstrated the formation of glass hydration layer and the depletion of soluble elements in the glass hydration layer. The results suggest that alteration of nuclear waste glass under silica saturation is attributed to glass hydration and the leaching behaviour of soluble elements depends on the growth of the glass hydration layer.

JAEA Reports

None

*; *

PNC TJ1638 96-001, 60 Pages, 1996/03

PNC-TJ1638-96-001.pdf:3.59MB

None

JAEA Reports

None

Kagawa, Akio; ; ; ;

PNC TN8410 94-078, 57 Pages, 1994/07

PNC-TN8410-94-078.pdf:1.08MB

None

Journal Articles

Temperature effects on reactivity in light water moderated UO$$_{2}$$ cores with soluble poisons

Miyoshi, Yoshinori; Yamamoto, Toshihiro; Suzaki, Takenori; Kobayashi, Iwao

Journal of Nuclear Science and Technology, 29(12), p.1201 - 1211, 1992/12

https://doi.org/10.3327/jnst.29.1201

no abstracts in English

Journal Articles

Density equations of UO$$_{2}$$(NO$$_{3}$$)$$_{2}$$-HNO$$_{3}$$ and UO$$_{2}$$(NO$$_{3}$$)$$_{2}$$-Gd(NO$$_{3}$$)$$_{3}$$-HNO$$_{3}$$ solutions

; ;

Journal of Nuclear Science and Technology, 24(5), p.415 - 419, 1987/05

https://doi.org/10.3327/jnst.24.415
 Times Cited Count：6 Percentile：75.76(Nuclear Science & Technology)

no abstracts in English

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