Published March 2018 | Version v1
Journal article Metadata-only

Investigation of the leaching behavior of components of the magnesium potassium phosphate matrix after high salt radioactive waste immobilization

Creators

  • 1. Russian Academy of Sciences, Moscow (Russian Federation). Vernadsky Institute of Geochemistry and Analytical Chemistry
  • 2. Russian Academy of Sciences, Moscow (Russian Federation). Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry

Description

The samples of the magnesium potassium phosphate (MPP) matrix have been synthesized during solidification of the simulator of acid intermediate level waste. The main phase of the obtained samples corresponds to MgK1-x(NH4)xPO4 × 6H2O. The behavior of the matrix components during leaching with bidistilled water according to the semi-dynamic test GOST R 52126-2003 has been studied. The high hydrolytic stability of the MPP matrix to leaching of 137Cs, 90Sr, 239Pu and 241Am exceeding the stability of the cement matrix has been shown. It has been found that the components leaching process is controlled by various mechanisms due to the formation of the salts with different solubility. (author)

Additional details

Publishing Information

Journal Title
Journal of Radioanalytical and Nuclear Chemistry
Journal Volume
315
Journal Issue
3
Journal Page Range
p. 481-486
ISSN
0236-5731
CODEN
JRNCDM

INIS

Country of Publication
Hungary
Country of Input or Organization
Hungary
INIS RN
49048464
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
AMERICIUM 241; CESIUM 137; HYDROLYSIS; LEACHING; MAGNESIUM; PLUTONIUM 239; POTASSIUM PHOSPHATES; RADIOACTIVE WASTE PROCESSING; SALTS; SOLIDIFICATION; SOLUBILITY; STRONTIUM 90; SYNTHESIS
Descriptors DEC
ACTINIDE NUCLEI; ALKALI METAL COMPOUNDS; ALKALINE EARTH ISOTOPES; ALKALINE EARTH METALS; ALPHA DECAY RADIOISOTOPES; AMERICIUM ISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CESIUM ISOTOPES; CHEMICAL REACTIONS; DECOMPOSITION; DISSOLUTION; ELEMENTS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HEAVY NUCLEI; INTERMEDIATE MASS NUCLEI; ISOTOPES; LYSIS; MANAGEMENT; METALS; NUCLEI; ODD-EVEN NUCLEI; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHOSPHATES; PHOSPHORUS COMPOUNDS; PLUTONIUM ISOTOPES; POTASSIUM COMPOUNDS; PROCESSING; RADIOACTIVE WASTE MANAGEMENT; RADIOISOTOPES; SEPARATION PROCESSES; SOLVOLYSIS; SPONTANEOUS FISSION RADIOISOTOPES; STRONTIUM ISOTOPES; WASTE MANAGEMENT; WASTE PROCESSING; YEARS LIVING RADIOISOTOPES

Optional Information

Notes
6 refs.