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JAEA Reports

Studies on Data Base Management for Nuclide Migration and Improvement of Individual Models (II) (Summary)

Tsujimoto, Keiichi*; Miura, Fusae*; Morooka, Koichi*; Ueda, Shinzo*

JNC TJ8400 2004-021, 75 Pages, 2005/02

JNC-TJ8400-2004-021.pdf:1.31MB

Methods of management of database which was based on understanding of phenomena, reliable, and closely related with performance assessment were studied on parallel with researches for individual model improvement by means of literature survey, column experiment, and analysis code development.For future management of JNC-TDB was discussed with the latest literatures. Collaboration with outer organization was considered necessary especially on authorization of the TDB. One of the outer organizations could be found in geo-thermal research field.For future management of JNC-SDB, sorption ithotherm of Np on bentonite was tested, and the consistency of the data in SDB was found. A semi-quantitative evaluation method of the reliability of the data was developed and tested with the sorption of Pu and Ni on bentonite. The result shows moderateness of the method and some literature data was considered unreliable by the evaluation.From the literature survey of ir/reversibility of nuclide sorption on colloid showed that apparent irreversibility may often be caused by slow kinetics. Additionally, some general recommendation on the system to be studied was discussed.The column experiment of Sr migration facilitated by colloid through porous media was carried out and analysed by COLFRAC-MRL code. The code was developed to simulate the colloid facilitated migration through porous media.

JAEA Reports

Studies on Data Base Management for Nuclide Migration and Improvement of Individual Models (II)

Tsujimoto, Keiichi*; Miura, Fusae*; Morooka, Koichi*; Ueda, Shinzo*

JNC TJ8400 2004-020, 294 Pages, 2005/02

JNC-TJ8400-2004-020.pdf:3.96MB

Methods of management of database which was based on understanding of phenomena, reliable, and closely related with performance assessment were studied on parallel with researches for individual model improvement by means of column experiment, and analysis code development for colloids.For nuclide transport database, the basic data development method was examined in order to improve the credibility of the data stored in the database.For the analysis and code development for colloid transport, user interface of the colloid transport analysis code, COLFRAC-MRL code, that was developed in the last year, was developed. The dose analysis based on the nuclide transport analysis with considering colloids are executed by using COLFRAC-MRL code. The effect of chemical equilibrium and kinetics model for nuclide sorption on colloids are evaluated in the analysis.The standard measurement method was examined and data was obtained by the experiments for distribution coefficient of nuclide and colloids, which is the important parameter for safety performance assessment of high-level radioactive waste.

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