Consolidated fuel reprocessing program. Progress report, October 1--December 31, 1978

Burch, William; Feldman, M.J.; Groenier, W.S.; Vondra, B.L.; Unger, Wibke

doi:10.2172/6154399

Cited by 3 publications

(3 citation statements)

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“…8. The reaction proceeds through both the concentration and denitration steps with micro- Recently, another co-denitration process has been reported [19]. In this process, the heavy metal nitrate feed is modified by an additive and direct denitration occurs as before in a rotary calciner, except that formation of the mastic phase has been eliminated.…”

Section: Direct Denitrationmentioning

confidence: 99%

“…Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 6/25/15 1:57 AM Results of DIPRES fabrication using UO2 have been reported in the literature [20,24]. Fabrication results using plutonium-containing spheres have also been reported in Europe [22,23}. In the United States, a Joint program for DIPRES development of plutonium based fuel has been underway for several years at the Hanford Engineering Development Laboratory (HEDL), Oak Ridge National Laboratory (ORNL) and Batteile Pacific Northwest Laboratory (PNL) [32]. This program utilizes the internal gelation process to prepare the DIPRES feed and has established the technical feasibility of mixed oxide DIPRES pellet fabrication [33].…”

Section: Dipres Processmentioning

confidence: 99%

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Nuclear Fuel Conversion and Fabrication Chemistry

Lerch¹,

Norman

1984

Radiochimica Acta

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Mixed oxide/Plutonium / Uranium /Fabrication /ConversionAbstract Following Irradiation and reprocessing of nuclear fuel, two Operations are performed to prepare the fuel for subsequent reuse as fuel: fuel conversion, and fuel fabrication. These Operations complete the classical nuclear fuel cycle. Fuel conversion involves generating a solid form suitable for fabrication into nuclear fuel. For Plutonium based fuels, either a pure PuO, material or a mixed PuOj -UOj fuel material is generated. Several methods are available for preparation of the pure PuO, including: Oxalate or peroxide precipitation; or direct denitration. Once the pure PuO, is formed, it is fabricated into fuel by mechanically blending it with ceramic grade UOj. The UO, can be prepared by several methods which include direct denitration, ADU precipitation, AUC precipitation, and peroxide precipitation. Alternatively, UOj-PuOj can be generated directly using coprecipitation, direct co-denitration, or gel sphere processes. In coprecipitation, uranium and plutonium are either precipitated as ammonium diuranate and plutonium hydroxide or as a mixture of ammonium uranyl-plutonyl carbonate, filtered and dried. In direct thermal denitration, solutions of uranium and plutonium nitrates are heated causing concentration and, subsequently, direct denitration. In gel sphere conversion, solutions of uranium and plutonium nitrate containing additives are formed into spherical droplets, gelled, washed and dried. Refabrication of these UOj-PuOj starting materials is accomplished by calcinationreduction to UOj -PuOj followed by pellet fabrication.

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Section: Direct Denitrationmentioning

confidence: 99%

Section: Dipres Processmentioning

confidence: 99%

Nuclear Fuel Conversion and Fabrication Chemistry

Lerch¹,

Norman

1984

Radiochimica Acta

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“…Additional data have recently been obtained from the dissolution of low-burnup (~0.2%) FFTF fuel, indicating essentially complete release of the fuel from the pins after ~30 min (ref. 15). Experiments are also being run using higher-burnup FFTF fuel; however, the results from this work are not yet available for use.…”

Section: Standard Conditionsmentioning

confidence: 99%