The mechanism of dissolution of sintered UO2 fuel pellets in nitric acid is the essential starting input information required for the design of a continuous dissolution system for spent nuclear fuel reprocessing. The current article establishes the mechanism of this reaction under typical PUREX process conditions based on the concentration profiles of nitric &amp; nitrous acids and NOX gas composition during the course of dissolution of sintered UO2 pellets in nitric acid. The results would be useful in optimizing the dissolution process and improving the throughput of the dissolution system. © 2017, Akadémiai Kiadó, Budapest, Hungary.

Nirav Pravinbhai Bhatt

Department Of Biotechnology

Nitric acid

nitrogen oxide

Nitrous acid

NUCLEAR FUEL

URANIUM DIOXIDE

article

chemical reaction kinetics

concentration (parameters)

concentration process

controlled study

dissociation

dissolution

Gas diffusion

NUCLEAR FUEL REPROCESSING

powder

Process optimization

reaction analysis

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Journal of Radioanalytical and Nuclear Chemistry

The quantitative understanding of the dissolution of nuclear fuel materials is essential for the process design and development of an industrial-scale nuclear fuel reprocessing plant. The main objective of this review article is to analyze the published data related to the dissolution of important nuclear materials, namely, urania, plutonia, thoria, and their oxides in the existing literature. The published results on rate-controlling step and reaction mechanism of dissolution processes are reconciled and reviewed in this work. Clear suggestions are made for future research work for the identification of rate-controlling step. Suggestions are also provided to overcome the shortfalls in the published data for the identification of intrinsic kinetics and mass-transfer rates. © 2019 Walter de Gruyter GmbH, Berlin/Boston 2019.

Fulltext

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Radiochimica Acta

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Mechanism of dissolution of nuclear fuel in nitric acid relevant to nuclear fuel reprocessing

Journal	Data powered by TypesetJournal of Radioanalytical and Nuclear Chemistry
Publisher	Data powered by TypesetSpringer Netherlands
ISSN	02365731
Open Access	No