Published 1991 | Version v1
Journal article Metadata-only

Dissolution of neptunium dioxide in aqueous solutions

Creators

  • 1. Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Dept. of Environmental Safety Research

Description

Dissolution of NpO2(s) in NaClO4 solutions of pH 2 to 6 was studied for durations up to 391 days at temperatures of 30 to 90deg C. Constant dissolution rates were observed following the initial non-linear dissolution that finished within the first two to three weeks. The obtained constant dissolution rates were 11 to 115 ppm/d at 30deg C, decreasing with the increase of pH between 2 and 6. Their temperature-dependence was small. (orig.)

Additional details

Publishing Information

Journal Title
Radiochimica Acta
Journal Volume
52/53
Journal Issue
pt.1
Series
Radiochim. Acta.
Journal Page Range
9-11
ISSN
0033-8230
CODEN
RAACA

Conference

Title
2. international conference on chemistry and migration behavior of actinides and fission products in the geosphere (Migration '89).
Dates
6-10 Nov 1989.
Place
Monterey, CA (USA).

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
22054360
Subject category
S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
Resource subtype / Literary indicator
Conference
Descriptors DEI
AQUEOUS SOLUTIONS; BENCH-SCALE EXPERIMENTS; CHLORATES; DISSOLUTION; MEDIUM TEMPERATURE; NEPTUNIUM OXIDES; NEPTUNIUM 239; PH VALUE; SODIUM COMPOUNDS; TEMPERATURE DEPENDENCE; TIME DEPENDENCE
Descriptors DEC
ACTINIDE COMPOUNDS; ACTINIDE NUCLEI; ALKALI METAL COMPOUNDS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CHALCOGENIDES; CHLORINE COMPOUNDS; DAYS LIVING RADIOISOTOPES; DISPERSIONS; HALOGEN COMPOUNDS; HEAVY NUCLEI; HOMOGENEOUS MIXTURES; ISOTOPES; MIXTURES; NEPTUNIUM COMPOUNDS; NEPTUNIUM ISOTOPES; NUCLEI; ODD-EVEN NUCLEI; OXIDES; OXYGEN COMPOUNDS; RADIOISOTOPES; SOLUTIONS; TRANSURANIUM COMPOUNDS