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3 results on '"J. K. Gayen"'

2. Remote start-up of Joule Heated Ceramic Melter – optimization of design parameters based on experimental and numerical investigations

Author

P. M. SatyaSai, J. K. Gayen, K. V. Ravi, Chetan P. Kaushik, and G. Suneel

Subjects
Nuclear and High Energy Physics, Work (thermodynamics), Materials science, 010308 nuclear & particles physics, Nuclear engineering, 0211 other engineering and technologies, Radioactive waste, Joule, 02 engineering and technology, 01 natural sciences, Finite element method, Nuclear Energy and Engineering, visual_art, 0103 physical sciences, Heat transfer, visual_art.visual_art_medium, Vitrification, 021108 energy, Ceramic, Frit
Abstract

In this research work, experimental studies on remote start-up of Joule Heated Ceramic Melter (JHCM) used for vitrification of radioactive liquid waste (RLW) were carried out. Numerical simulations...

Published
2019

3. Direct spectrophotometric analysis of low level Pu(III) in Pu(IV) nitrate of Pu precipitation process feed solution

Author

Tanoj Kumar, Papiya Dey, P. Magesvaran, B. Shreekumar, J. K. Gayen, and K. Suresh Kumar

Subjects
medicine.diagnostic_test, Precipitation (chemistry), Health, Toxicology and Mutagenesis, Public Health, Environmental and Occupational Health, Oxide, chemistry.chemical_element, Pollution, Analytical Chemistry, Plutonium, chemistry.chemical_compound, Nuclear Energy and Engineering, chemistry, Oxidation state, Spectrophotometry, Acetone, medicine, Radiology, Nuclear Medicine and imaging, Sample preparation, Benzene, Spectroscopy, Nuclear chemistry
Abstract

To achieve end user's specified PuO2, con- trolling and monitoring of Pu in its fourth valency state is essential prior to the conversion of Pu-nitrate to its oxide through oxalate precipitation process. Conventional radio- metric procedure for the analysis of Pu oxidation state in Pu-nitrate solution containing trace level of Pu(III) has limitation due to oxidation of Pu(III) during the sample preparation with respect to acidity. A simple direct spec- trophotometry using an optic fiber spectrophotometer was attempted for the estimation of trace level of Pu(III), after separating the bulk amount of Pu(IV) by maintaining the sample acidity. By using a synergistic mixture of 30 % TBP and 1 M theonyl trifluoro acetone in benzene, the Pu(IV) could be removed to a level which doesn't interfere in the Pu(III) absorption.

Published
2012

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