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Simfuel dissolution studies in granitic groundwater

Abstract

The dissolution behavior of an unirradiated chemical analogue of spent nuclear fuel (SIMFUEL) has been studied in the presence of two different synthetic groundwater at 25 deg C and under both oxic and anoxic conditions. The release of U, Mo, Ba, Y and Sr was monitored during static (batch) leaching experiments of long duration (about 250 days). Preliminary results from continuous flow-through reactor experiments are also reported. The results obtained indicate the usefulness and limitations of SIMFUEL in the study of the kinetics and mechanism of dissolution of the minor components of spent nuclear fuel. Molybdenum, barium and strontium have shown a trend to congruent dissolution with the SIMFUEL matrix after a higher initial fractional release. Yttrium release has been found to be solubility controlled under the experimental conditions. A clear dependence on the partial pressure of O{sub 2} of the rates of dissolution of uranium has been observed.
Authors:
Casas, I; Caceci, M S; Bruno, J; [1]  Sandino, A; [2]  Ollila, K [3] 
  1. MBT Technologia Ambiental CENT, Parc Technologic del Valles, Cerdanyola (Spain)
  2. Royal Institute of Technology, Stockholm (Sweden). Dept. of Inorganic Chemistry
  3. Technical Research Centre of Finland, Espoo (Finland). Reactor Lab.
Publication Date:
Sep 01, 1991
Product Type:
Technical Report
Report Number:
YJT-91-18
Reference Number:
SCA: 052002; PA: AIX-23:040496; SN: 92000732992
Resource Relation:
Other Information: PBD: Sep 1991
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; HIGH-LEVEL RADIOACTIVE WASTES; DISSOLUTION; SPENT FUELS; ANALOG SYSTEMS; GROUND WATER; RADIOACTIVE WASTE DISPOSAL; SIMULATION; SOLUBILITY; 052002; WASTE DISPOSAL AND STORAGE
OSTI ID:
10142590
Research Organizations:
Voimayhtioeiden Ydinjaetetoimikunta, Helsinki (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE92628342; TRN: FI9200010040496
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
FIN
Size:
33 p.
Announcement Date:
Jul 05, 2005

Citation Formats

Casas, I, Caceci, M S, Bruno, J, Sandino, A, and Ollila, K. Simfuel dissolution studies in granitic groundwater. Finland: N. p., 1991. Web.
Casas, I, Caceci, M S, Bruno, J, Sandino, A, & Ollila, K. Simfuel dissolution studies in granitic groundwater. Finland.
Casas, I, Caceci, M S, Bruno, J, Sandino, A, and Ollila, K. 1991. "Simfuel dissolution studies in granitic groundwater." Finland.
@misc{etde_10142590,
title = {Simfuel dissolution studies in granitic groundwater}
author = {Casas, I, Caceci, M S, Bruno, J, Sandino, A, and Ollila, K}
abstractNote = {The dissolution behavior of an unirradiated chemical analogue of spent nuclear fuel (SIMFUEL) has been studied in the presence of two different synthetic groundwater at 25 deg C and under both oxic and anoxic conditions. The release of U, Mo, Ba, Y and Sr was monitored during static (batch) leaching experiments of long duration (about 250 days). Preliminary results from continuous flow-through reactor experiments are also reported. The results obtained indicate the usefulness and limitations of SIMFUEL in the study of the kinetics and mechanism of dissolution of the minor components of spent nuclear fuel. Molybdenum, barium and strontium have shown a trend to congruent dissolution with the SIMFUEL matrix after a higher initial fractional release. Yttrium release has been found to be solubility controlled under the experimental conditions. A clear dependence on the partial pressure of O{sub 2} of the rates of dissolution of uranium has been observed.}
place = {Finland}
year = {1991}
month = {Sep}
}