Radioisotopic heat sources. Revision 1

Rohrmann, C.A.

doi:10.2172/5712006

Cited by 8 publications

(4 citation statements)

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“…46 are determined, above all, by its outer electronic shell, completely filled with 18 electrons, which is unique 2 POKHITONOV, ROMANOVSKII among the metals. An atom with such an electronic structure cannot but exhibit a high chemical stability.…”

Section: Speciation Of Palladium In Irradiated Fuel and Reprocessing mentioning

confidence: 99%

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Palladium in Irradiated Fuel. Are There Any Prospects for Recovery and Application?

Pokhitonov

Romanovskii

2005

Radiochemistry

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Published data on the speciation and behavior of Pd in different stages of reprocessing of irradiated fuel from NPPs were analyzed. Various methods for recovering Pd from solutions and solids of different compositions, arising in reprocessing, were described. The Pd sales volumes in the recent decades were reported, and possible industrial and technical applications of Pd were discussed. An opinion is expressed that it is of interest to recover [reactor-grade] Pd to be used in reprocessing of the waste from radiochemical enterprises (e.g., immobilization of 129 I and/or TPEs), i.e., in processes where the presence of radioactive nuclide 107 Pd does not matter and exhaustive removal of other fission products is not required.The history of science and technology abounds in cases where ideas, set aside many years ago, are revived. This is true of the attempted recovery of platinum group metals (PGMs) from irradiated fuel of NPPs. The first relevant publications [133] appeared about 50 years ago, and their authors considered it very attractive to find the possibilities of recovering Pd and Rh whose yield in uranium fission products is fairly high, namely, kilograms per ton of fuel. But as yet, no country has succeeded in developing an acceptable method for commercial recovery of platinum metals from real radioactive solutions. This is due to a number of reasons.The main purpose of irradiated nuclear fuel reprocessing is to recover U and Pu and to localize fission products, rather than to recover individual radionuclides intended for commercial purposes. On the other hand, the use of any radionuclides, even minimally active, is extremely negatively received by the public. Probably, this is the most significant negative factor that questions the appearance of a demand for [reactor-grade] Pd or Rh in their traditional application spheres, even if they will be cheaper than Pd and Rh extracted from ores.At the same time, depletion of mineral resources of platinum metals will sooner or later cause their prices to rise to the level when irradiated fuel could become a real substitute to their commercial production sources. Since recently, technologies for high-level waste (HLW) partitioning have been developed, which would yield solutions that are less active and simpler in composition than the first extraction cycle raffinates containing all the fission products and, thus, will be suitable for recovery of Pd and Rh.In this work, we analyzed publications on recovery of Pd from irradiated fuel. Since the prospects for commercial recovery of Pd are directly related to technical demands and natural reserves, we considered it necessary to supplement this review with a section devoted to possible applications of Pd and its compounds.

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Section: Speciation Of Palladium In Irradiated Fuel and Reprocessing mentioning

confidence: 99%

“…TBP)2 . These authors believe that, in the case of extraction with TBPO and TIAPO, Pd passes into the organic phase in the form of anhydrous disolvates Pd 2+ + 2NO !…”

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confidence: 99%

Palladium in Irradiated Fuel. Are There Any Prospects for Recovery and Application?

Pokhitonov

Romanovskii

2005

Radiochemistry

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“…3. Massas dos radioisótopos e elementos que formam óxidos e cloretosConsiderando as estruturas dos módulos Seebeck demonstrados na planilha 1, que a quantidade de módulos totais devem ser NT >= 16 módulos e a densidade dos compostos na coluna "densidade (g/cm3 )"[2,3,9], encontramos as informações de estrutura na tabela 4 a seguir, Tab. 4.…”

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“…. Informações referentes aos custos em U$ para cara radioisótopo comparando com 238 Pu[2,6,7,9,10,11] …”

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