Testing of a near-field biogeochemical model against data from a large-scale gas generation experiment

J. S. Small; M. Nykyri; N. Paaso; U. Hovi; Merja Itävaara; Tuija Sarlin

doi:10.1557/PROC-932-116.1

Testing of a near-field biogeochemical model against data from a large-scale gas generation experiment

J. S. Small, M. Nykyri, N. Paaso, U. Hovi, Merja Itävaara, Tuija Sarlin

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

2 Citations (Scopus)

Abstract

A biogeochemical model that represents processes of metal corrosion, microbial degradation of cellulosic waste and mass transfer within a heterogeneous system has been used to represent processes of gas generation in a large-scale (20m3) experiment that has studied degradation of typical nuclear reactor operating waste. The experiment has been in operation for a period of about eight years and has established a pattern of methanogenic gas generation. A "blind testing" approach has been used to develop the model of the experiment using independently derived kinetic data for corrosion and microbial processes. The model correctly represents the anaerobic conditions leading to methane generation during the course of the experiment. The overall rate of gas generation of the experiment is well represented, as is the composition of evolved gases and geochemistry of sampled liquids. The experiment and the model together build confidence in the ability to simulate processes of gas generation and variation in chemical conditions in heterogeneous repository environments.

Original language	English
Title of host publication	Scientific Basis for Nuclear Waste Management XXIX
Editors	Pierre van Iseghem
Publisher	Materials Research Society
Pages	111-118
DOIs	https://doi.org/10.1557/PROC-932-116.1
Publication status	Published - 2006
MoE publication type	A4 Article in a conference publication
Event	29th MRS Symposium on the Scientific Basis for Nuclear Waste Management - Ghent, Belgium Duration: 12 Sept 2005 → 16 Sept 2005 Conference number: 29

Publication series

Series	Materials Research Society Symposia Proceedings
Volume	932
ISSN	0272-9172

Conference

Conference	29th MRS Symposium on the Scientific Basis for Nuclear Waste Management
Country/Territory	Belgium
City	Ghent
Period	12/09/05 → 16/09/05

Access to Document

10.1557/PROC-932-116.1

Cite this

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title = "Testing of a near-field biogeochemical model against data from a large-scale gas generation experiment",

abstract = "A biogeochemical model that represents processes of metal corrosion, microbial degradation of cellulosic waste and mass transfer within a heterogeneous system has been used to represent processes of gas generation in a large-scale (20m3) experiment that has studied degradation of typical nuclear reactor operating waste. The experiment has been in operation for a period of about eight years and has established a pattern of methanogenic gas generation. A {"}blind testing{"} approach has been used to develop the model of the experiment using independently derived kinetic data for corrosion and microbial processes. The model correctly represents the anaerobic conditions leading to methane generation during the course of the experiment. The overall rate of gas generation of the experiment is well represented, as is the composition of evolved gases and geochemistry of sampled liquids. The experiment and the model together build confidence in the ability to simulate processes of gas generation and variation in chemical conditions in heterogeneous repository environments.",

author = "Small, {J. S.} and M. Nykyri and N. Paaso and U. Hovi and Merja It{\"a}vaara and Tuija Sarlin",

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doi = "10.1557/PROC-932-116.1",

language = "English",

series = "Materials Research Society Symposia Proceedings",

publisher = "Materials Research Society",

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editor = "{van Iseghem}, Pierre",

booktitle = "Scientific Basis for Nuclear Waste Management XXIX",

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note = "29th MRS Symposium on the Scientific Basis for Nuclear Waste Management ; Conference date: 12-09-2005 Through 16-09-2005",

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Small, JS, Nykyri, M, Paaso, N, Hovi, U, Itävaara, M & Sarlin, T 2006, Testing of a near-field biogeochemical model against data from a large-scale gas generation experiment. in P van Iseghem (ed.), Scientific Basis for Nuclear Waste Management XXIX. Materials Research Society, Materials Research Society Symposia Proceedings, vol. 932, pp. 111-118, 29th MRS Symposium on the Scientific Basis for Nuclear Waste Management, Ghent, Belgium, 12/09/05. https://doi.org/10.1557/PROC-932-116.1

Testing of a near-field biogeochemical model against data from a large-scale gas generation experiment. / Small, J. S.; Nykyri, M.; Paaso, N. et al.
Scientific Basis for Nuclear Waste Management XXIX. ed. / Pierre van Iseghem. Materials Research Society, 2006. p. 111-118 (Materials Research Society Symposia Proceedings, Vol. 932).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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AB - A biogeochemical model that represents processes of metal corrosion, microbial degradation of cellulosic waste and mass transfer within a heterogeneous system has been used to represent processes of gas generation in a large-scale (20m3) experiment that has studied degradation of typical nuclear reactor operating waste. The experiment has been in operation for a period of about eight years and has established a pattern of methanogenic gas generation. A "blind testing" approach has been used to develop the model of the experiment using independently derived kinetic data for corrosion and microbial processes. The model correctly represents the anaerobic conditions leading to methane generation during the course of the experiment. The overall rate of gas generation of the experiment is well represented, as is the composition of evolved gases and geochemistry of sampled liquids. The experiment and the model together build confidence in the ability to simulate processes of gas generation and variation in chemical conditions in heterogeneous repository environments.

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Small JS, Nykyri M, Paaso N, Hovi U, Itävaara M, Sarlin T. Testing of a near-field biogeochemical model against data from a large-scale gas generation experiment. In van Iseghem P, editor, Scientific Basis for Nuclear Waste Management XXIX. Materials Research Society. 2006. p. 111-118. (Materials Research Society Symposia Proceedings, Vol. 932). doi: 10.1557/PROC-932-116.1

Testing of a near-field biogeochemical model against data from a large-scale gas generation experiment

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