Near-field/Far-field Interface of a Near-Surface Low-Level Radioactive Waste Site

I. R. Beadle; J. Graham; S. Boult; V. L. Hand; Peter Warwick; M. G. Randall; D. P. Trivedi; P. N. Humphreys

doi:10.1557/PROC-807-835

Near-field/Far-field Interface of a Near-Surface Low-Level Radioactive Waste Site

I. R. Beadle, J. Graham, S. Boult, V. L. Hand, Peter Warwick, M. G. Randall, D. P. Trivedi, P. N. Humphreys

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Abstract

Experimental and Modelling studies have been used to investigate the biogeochemical processes occurring at the interface zone between the near-field and far-field of the Drigg Low-Level radioactive Waste (LLW) trenches. These have led to a conceptual model of interface biogeochemistry, which has subsequently been modelled by the BNFL code known as the Generalised Repository Model (GRM). GRM simulations suggest that as organic rich leachate migrates into the far-field, iron III minerals such as iron hydroxide will dissolve, and reduced iron minerals such as siderite will precipitate due to microbial processes. Batch and column experimental studies have verified this conceptual understanding. Some unexpected processes, such as the presence of nitrate enhancing sulphate reduction, were also observed.

Original language	English
Pages (from-to)	835-840
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	807
DOIs	https://doi.org/10.1557/PROC-807-835
Publication status	Published - 2004
Externally published	Yes
Event	Scientific Basis for Nuclear Waste Management XXVII - Kalmar, Sweden Duration: 15 Jun 2003 → 19 Jun 2003 Conference number: 27

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title = "Near-field/Far-field Interface of a Near-Surface Low-Level Radioactive Waste Site",

abstract = "Experimental and Modelling studies have been used to investigate the biogeochemical processes occurring at the interface zone between the near-field and far-field of the Drigg Low-Level radioactive Waste (LLW) trenches. These have led to a conceptual model of interface biogeochemistry, which has subsequently been modelled by the BNFL code known as the Generalised Repository Model (GRM). GRM simulations suggest that as organic rich leachate migrates into the far-field, iron III minerals such as iron hydroxide will dissolve, and reduced iron minerals such as siderite will precipitate due to microbial processes. Batch and column experimental studies have verified this conceptual understanding. Some unexpected processes, such as the presence of nitrate enhancing sulphate reduction, were also observed.",

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AU - Beadle, I. R.

AU - Graham, J.

AU - Boult, S.

AU - Hand, V. L.

AU - Warwick, Peter

AU - Randall, M. G.

AU - Trivedi, D. P.

AU - Humphreys, P. N.

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PY - 2004

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AB - Experimental and Modelling studies have been used to investigate the biogeochemical processes occurring at the interface zone between the near-field and far-field of the Drigg Low-Level radioactive Waste (LLW) trenches. These have led to a conceptual model of interface biogeochemistry, which has subsequently been modelled by the BNFL code known as the Generalised Repository Model (GRM). GRM simulations suggest that as organic rich leachate migrates into the far-field, iron III minerals such as iron hydroxide will dissolve, and reduced iron minerals such as siderite will precipitate due to microbial processes. Batch and column experimental studies have verified this conceptual understanding. Some unexpected processes, such as the presence of nitrate enhancing sulphate reduction, were also observed.

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Near-field/Far-field Interface of a Near-Surface Low-Level Radioactive Waste Site

Abstract

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