Plutonium carbides

Plutonium breeder LMFBR fuels, 6, 926 Plutonium carbide nuclear fuels, 6, 928 Plutonium complexes, 3,1131-1215 cupferron, 2, 510 Plutonium(III) complexes... 

Plutonium(IV), hydrolysis of, 19 698 Plutonium-231, 19 670 Plutonium-238, 19 668, 669, 675 special precautions for, 19 703 Plutonium-239, 19 669 Plutonium aqua ions, thermodynamic values for, 19 693t Plutonium carbide, 4 649t stoichiometry, 4 651 Plutonium carbide (2 3), 4 649t Plutonium carbides, 19 690-691 Plutonium cations, 19 692 Plutonium chalcogenides, 19 691 Plutonium complexes bonding in, 19 694—695 formation constants for, 19 697t... 

The yield and rate of the tantalothermic reduction of plutonium carbide at 1975 K are given in Fig. 3. Producing actinide metals by metallothermic reduction of their carbides has some interesting advantages. The process is applicable in principle to all of the actinide metals, without exception, and at an acceptable purity level, even if quite impure starting material (waste) is used. High decontamination factors result from the selectivities achieved at the different steps of the process. Volatile oxides and metals are eliminated hy vaporization during the carboreduction. Lanthanides, Y, Ti, Zr, Hf, V, Nb, Ta, Mo, and W form stable carbides, whereas Rh, Os, Ir, Pt, and Pd remain as nonvolatile metals in the actinide carbides. Thus, these latter elements... 

Plutonium reacts with hydrogen at high temperatures forming hydrides. With nitrogen, it forms nitrides, and with halogens, various plutonium hahdes form. Halide products also are obtained with halogen acids. Reactions with carbon monoxide yields plutonium carbides, whde with carbon dioxide, the products are both carbides and oxides. Such reactions occur only at high temperatures. 

Uranium and plutonium carbide fuels have also been investigated and their dissolution in nitric acid results in the formation of organic acids as well as In the case of (Uo.gPuo.2)C... 

H. Wedemeyer, E. Guenther, Preparation of Uranium-Plutonium Carbide, transl. of KFK-2238 (ORNL-tr-4180), 1974. 

Other analytical problems to which the direct comparison method has been applied include the determination of mixed iron oxides in the oxide scale on steel [14.10], the beta phase in titanium alloys [14.11], and mixed uranium and plutonium carbides [14.12]. 

These authors measured the enthalpies of combustion of thorium and plutonium carbides by oxygen bomb combustion calorimetry. 

At the Japan Atomic Energy Research Institute (JAERI) mixed carbide and nitride fuels have been investigated fi om the viewpoint of collection of basic data on advanced FR fuels and also fuels for transmutation of minor actinides [7.56, 7.61]. The research covers fabrication technology, property measurements [7.57, 7.58] and irradiation tests [7.59]. Nine fuel pins with uranium-plutonium carbide were irradiated in Japan Research Reactor-2 (JRR-2) and... 

One of the principal criteria for fuel with an inert matrix is its reproces g ability. From this point of view solid solutions of plutonium carbides, plutonium nitrides and inert matrices ZrC and ZrN seem to be the best candidates. 

Rand, M. H. (1968) Technical Panel on Uranium and Plutonium Carbides, International Atomic Energy Agency, Vienna. 

Ogard, A.E., Leary, J.A., 1970 (August). Plutonium Carbides. Retrieved 15.06.15, from US Department of Energy http //www.osti.gov/scitech/servlets/purl/4102301/. 

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