Current Process Developments in Production of Natural UO2 Green Pellets
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Abstract
Nuclear Fuel Complex (NFC) is responsible for manufacturing natural UO2 fuel for the operating and forthcoming PHWRs in India. In recent years, the following two important modifications have been made in the production line leading to improvement in productivity:
• modifications in the press-tooling, granulator and in the powder handling systems in precompaction press facilitating reduction of fine fraction (-100 mesh) of UO2 powder and simultaneous processing of the virgin powder with the fine fraction
• use of an alternative and effective Admixed Powder Lubricant in pelletization for overcoming problems faced with zinc-stearate
The paper discusses the above process developments and highlights the benefits obtained.
• modifications in the press-tooling, granulator and in the powder handling systems in precompaction press facilitating reduction of fine fraction (-100 mesh) of UO2 powder and simultaneous processing of the virgin powder with the fine fraction
• use of an alternative and effective Admixed Powder Lubricant in pelletization for overcoming problems faced with zinc-stearate
The paper discusses the above process developments and highlights the benefits obtained.
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