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Modelling of redox front and uranium movement in a uranium mine at Pocos de Caldas, Brazil

Technical Report:

Abstract

A study of the migration of uranium at the Pocos de Caldas uranium mine in Brazil under the influence of the infiltration of oxidising groundwaters has been performed. The modelling was carried out using the coupled chemical equilibria/transport code CHEQMATE. The work presented in this paper extends a previous study. Results give some encouraging agreements with field data, generally increasing confidence in the use of such modelling techniques in problems associated with the migration of radionuclides away from a nuclear waste repository. For particular aspects of the problem where good agreement with field data was not obtained, a number of reasons have been suggested. This study also highlights the importance of accurate thermodynamic data and choice of solubility-limiting mineral phases for modelling such systems. (author).
Authors:
Cross, J E; Gabriel, D S; Haworth, A; Sharland, S M; Tweed, C J; [1]  Neretnieks, I [2] 
  1. AEA Decommissioning and Radwaste, Harwell (UK). Radwaste Disposal Research and Development
  2. Royal Inst. of Tech., Stockholm (Sweden)
Publication Date:
Apr 01, 1991
Product Type:
Technical Report
Report Number:
NSS-R-252; AEA-DR-0081.
Reference Number:
SCA: 540230; 052002; PA: AIX-23:004689; SN: 91000615182
Resource Relation:
Other Information: PBD: Apr 1991
Subject:
54 ENVIRONMENTAL SCIENCES; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; RADIONUCLIDE MIGRATION; C CODES; COMPUTERIZED SIMULATION; URANIUM; URANIUM MINES; BRAZIL; ROCK-FLUID INTERACTIONS; EXPERIMENTAL DATA; GROUND WATER; LEACHATES; RADIOACTIVE WASTE DISPOSAL; REDOX PROCESS; UNDERGROUND DISPOSAL; 540230; 052002; RADIOACTIVE MATERIALS MONITORING AND TRANSPORT; WASTE DISPOSAL AND STORAGE
OSTI ID:
10102418
Research Organizations:
United Kingdom Nirex Ltd., Harwell (United Kingdom)
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Other: ON: DE92611509; TRN: GB9104245004689
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
GBN
Size:
22 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Cross, J E, Gabriel, D S, Haworth, A, Sharland, S M, Tweed, C J, and Neretnieks, I. Modelling of redox front and uranium movement in a uranium mine at Pocos de Caldas, Brazil. United Kingdom: N. p., 1991. Web.
Cross, J E, Gabriel, D S, Haworth, A, Sharland, S M, Tweed, C J, & Neretnieks, I. Modelling of redox front and uranium movement in a uranium mine at Pocos de Caldas, Brazil. United Kingdom.
Cross, J E, Gabriel, D S, Haworth, A, Sharland, S M, Tweed, C J, and Neretnieks, I. 1991. "Modelling of redox front and uranium movement in a uranium mine at Pocos de Caldas, Brazil." United Kingdom.
@misc{etde_10102418,
title = {Modelling of redox front and uranium movement in a uranium mine at Pocos de Caldas, Brazil}
author = {Cross, J E, Gabriel, D S, Haworth, A, Sharland, S M, Tweed, C J, and Neretnieks, I}
abstractNote = {A study of the migration of uranium at the Pocos de Caldas uranium mine in Brazil under the influence of the infiltration of oxidising groundwaters has been performed. The modelling was carried out using the coupled chemical equilibria/transport code CHEQMATE. The work presented in this paper extends a previous study. Results give some encouraging agreements with field data, generally increasing confidence in the use of such modelling techniques in problems associated with the migration of radionuclides away from a nuclear waste repository. For particular aspects of the problem where good agreement with field data was not obtained, a number of reasons have been suggested. This study also highlights the importance of accurate thermodynamic data and choice of solubility-limiting mineral phases for modelling such systems. (author).}
place = {United Kingdom}
year = {1991}
month = {Apr}
}