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Journal of Radioanalytical and Nuclear Chemistry

, Volume 303, Issue 1, pp 1029–1035 | Cite as

Dissolution of intact UO2 pellet in batch and rotary dissolver conditions

  • Jayendra Kumar Gelatar
  • Bijendra Kumar
  • M. Sampath
  • Shekhar KumarEmail author
  • U. Kamachi Mudali
  • R. Natarajan
Article

Abstract

Comparative dissolution of intact un-irradiated UO2 pellet of PHWR fuel dimensions was performed in batch and dynamic rotary dissolver conditions in aqueous nitric acid solutions at elevated temperatures. The extent of dissolution was estimated by determining the uranium concentration of the resulting aqueous solution. It was observed that rate of dissolution was much faster in dynamic conditions as compared to static batch conditions.

Keywords

UO2 Reprocessing Dissolution Aqueous media Nitric acid 

Abbreviations

FBR

Fast Breeder Reactor

FORTRAN

FORmula TRANslation, a computer language of yesteryears

JAEA

Japan Atomic Energy Agency

NEXT

New Extraction System for TRU Recovery

ORNL

Oak Ridge National Laboratory

PHWR

Pressurized Heavy Water Reactor

List of symbols

CA

Concentration of species A (mol/L)

CA0

Initial concentration of species A (mol/L)

k

Rate constant for the reaction, units will depend on order. For first order reaction, units will be reciprocal of time

rA

Rate of reaction, also equal to \( -\frac{{{\text{d}}C_{A} }}{{{\text{d}}t}} \) (mol/L · s or mol/L · h)

t

time (h)

Notes

Acknowledgments

Authors sincerely acknowledge the assistance provided by Mr. S. Sundaramurthy in conducting the experiments.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2014

Authors and Affiliations

  • Jayendra Kumar Gelatar
    • 1
  • Bijendra Kumar
    • 1
  • M. Sampath
    • 1
  • Shekhar Kumar
    • 1
    Email author
  • U. Kamachi Mudali
    • 1
  • R. Natarajan
    • 1
  1. 1.Reprocessing R&D Division, Reprocessing GroupIndira Gandhi Centre for Atomic ResearchKalpakkamIndia

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