TAILIEUCHUNG - Study of the changes in composition of ammonium diuranate with progress of precipitation, and study of the properties of ammonium diuranate and its subsequent products produced from both uranyl nitrate and uranyl fluoride solutions

In present paper, ADU has been produced via both the routes. Variation of uranium recovery and crystal structure and composition of ADU with progress in precipitation reaction has been studied with special attention on first appearance of the precipitate Further, ADU produced by two routes have been calcined to UO3, then reduced to UO2 and hydroflorinated to UF4. Effect of two different process routes of ADU precipitation on the characteristics of ADU, UO3, UO2 and UF4 were studied here. | Study of the changes in composition of ammonium diuranate with progress of precipitation, and study of the properties of ammonium diuranate and its subsequent products produced from both uranyl nitrate and uranyl fluoride solutions N u c l e a r E n g i n e e r i n g a n d T e c h n o l o g y 4 9 ( 2 0 1 7 ) 5 4 1 e5 4 8 Available online at ScienceDirect Nuclear Engineering and Technology journal homepage: Original Article Study of the Changes in Composition of Ammonium Diuranate with Progress of Precipitation, and Study of the Properties of Ammonium Diuranate and its Subsequent Products Produced from both Uranyl Nitrate and Uranyl Fluoride Solutions Subhankar Manna a,b,*, Raj Kumar a, Santosh K. Satpati a, Saswati B. Roy a, and Jyeshtharaj B. Joshi b,c a Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India b Homi Bhabha National Institute (HBNI), Anushakti Nagar, Mumbai 400 094, India c Department of Chemical Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400 019, India article info abstract Article history: Uranium metal used for fabrication of fuel for research reactors in India is generally Received 18 July 2016 produced by magnesio-thermic reduction of UF4. Performance of magnesio-thermic re- Received in revised form action and recovery and quality of uranium largely depends on properties of UF4. As 20 September 2016 ammonium diuranate (ADU) is first product in powder form in the process flow-sheet, Accepted 21 September 2016 properties of UF4 depend on properties of ADU. ADU is generally produced from uranyl Available online 14 October 2016 nitrate solution (UNS) for natural uranium metal production and from uranyl fluoride solution (UFS) for low enriched uranium metal production. In present paper, ADU has been Keywords: produced via both the routes. Variation of uranium recovery and crystal structure and Ammonium diuranate .

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• Study of the changes in composition of ammonium diuranate
• Progress of precipitation
• Ammonium diuranate and its subsequent products produced
• Both uranyl nitrate and uranyl fluoride solutions
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