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Journal Articles

Influence of adsorption of molecular iodine onto aerosols on iodine source term in severe accident

Ishikawa, Jun; Ito, Hiroto; Maruyama, Yu

Proceedings of 23rd International Conference on Nuclear Engineering (ICONE-23) (DVD-ROM), 6 Pages, 2015/05

JAEA Reports

Migration behavior of actinide colloids in near-field

Nagasaki, Shinya*

JNC-TJ8400 2000-004, 32 Pages, 2000/02

JNC-TJ8400-2000-004.pdf:0.69MB

Equilibrium and kinetics of sorption of NpO$$_{2}^{+}$$ on illite were investigated at pH = 6 by using the differential pulse anodic stripping voltammetry method and the spectroscopic method, respectively. It was found that the sorption isotherm obtained was fitted better by the Langmuir-Freundlich type equation than by the Langmuir equation. The heterogeneity coefficient was 0.89 $$pm$$ 0.05 and the half width at half maximum (HWHM) of affinity spectrum was 0.19 log unit, indicating that the surfacc of illite used has a low degree of heterogeneity. The kinetic spectra indicated that the sorption of NpO$$_{2}^{+}$$ occurs only at the outer surfacc. The mean HWHM of the kinetic spectra was 0.18 log unit. This also proves that the sorption kinetics of NpO$$_{2}^{+}$$ on the illite used is controlled by the same heterogeneity of the sorption sites. From the dependence of mean rate constants on temperature, a mean apparent activation enthalpy and a mean apparent activation entropy were evaluated at 37$$pm$$3 kJ/mol and - 69 $$pm$$ 7 J/K$$cdot$$mol, respectively. This value of enthalpy suggests that the sorption is not controlled by diffusion through the hydrodynamic film around the illite. Equilibrium and kinetics of sorption of NpO$$_{2}^{+}$$ and Np(V) carbonate complexes (mainly NpO$$_{2}$$CO$$_{3}$$) on Na-montmorillonite were also examined by using same technique.

Journal Articles

Applicability of insoluble tannin to TRU aqueous waste treatment in NUCEF; Improvement of breakthrough capacity by temperature control

; Usuda, Shigekazu; Maeda, Atsushi

Proc. of 7th Int. Conf. on Radioactive Waste Management and Environmental Remediation (ICEM'99)(CD-ROM), 3 Pages, 1999/00

no abstracts in English

JAEA Reports

None

Sugihara, Yoichiro*; Mukai, Katsuyuki*; Nunomiya, Ichiro*

PNC-TJ6357 97-001, 40 Pages, 1997/03

PNC-TJ6357-97-001.pdf:1.52MB

None

JAEA Reports

None

Ikeda, Takao*; Yoshida, Hideji*

PNC-TJ1281 97-001, 98 Pages, 1997/03

PNC-TJ1281-97-001.pdf:3.5MB

None

JAEA Reports

None

*; Nagasaki, Shinya*

PNC-TJ1602 96-001, 67 Pages, 1996/03

PNC-TJ1602-96-001.pdf:1.42MB

None

Journal Articles

Recovery of hydrogen isotopes and impurity mixture by cryogenic molecular sieve bed for GDC gas cleanup

Enoeda, Mikio; Kawamura, Yoshinori; Okuno, Kenji; Tanaka, Kenichi*; Uetake, Mitsuru*; Nishikawa, Masabumi*

Fusion Technology, 28(3), p.591 - 596, 1995/10

no abstracts in English

JAEA Reports

None

Numata, Koji; ; Nemoto, Takeshi;

PNC-TN8430 93-001, 37 Pages, 1993/04

PNC-TN8430-93-001.pdf:0.34MB

None

JAEA Reports

None

*; *; *; *

PNC-TJ160 85-05, 132 Pages, 1985/03

PNC-TJ160-85-05.pdf:2.41MB

None

Journal Articles

Removal of tritiated water vapor by molecular sieve 5A and 13X,silica gel and activated alumina

Nakashima, Mikio; Tachikawa, Enzo

Journal of Nuclear Science and Technology, 19(7), p.571 - 577, 1982/00

 Times Cited Count:12 Percentile:23.46(Nuclear Science & Technology)

no abstracts in English

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