Modelling in-situ matrix diffusion at Palmottu natural analogue study site in SW Finland

Kari Rasilainen; Juhani Suksi

doi:10.1557/PROC-294-489

Modelling in-situ matrix diffusion at Palmottu natural analogue study site in SW Finland

Kari Rasilainen, Juhani Suksi

University of Helsinki

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

1 Citation (Scopus)

Abstract

Radioactive disequilibria, between U-238, U-234, and Th-230, in crystalline rock adjacent to a fracture, indicates mass transfer of U and Th between water in the fracture and the rock. The matrix diffusion theory was used to interpret the observed profiles of mobilized nuclides around the natural fracture. The interpretation of the profiles was based on the use of uranium series disequilibrium code, URSE, and migration code FTRANS. The model system was characterized using all available site-specific data, and the system evolution was outlined using the geology of the Palmottu site. The simulated concentration profiles, as a function of depth from the fracture surface, indicate that measured profiles can be modelled by matrix diffusion, assuming realistic initial and boundary conditions and diffusion times of 300,000 years.

Original language	English
Title of host publication	Scientific Basis for Nuclear Waste Management XVI
Subtitle of host publication	Symposium V
Editors	C.G. Interrante, R.T. Pabalan
Place of Publication	Pittsburgh
Publisher	Materials Research Society
Pages	489-495
ISBN (Print)	978-1-558-99189-7
DOIs	https://doi.org/10.1557/PROC-294-489
Publication status	Published - 1993
MoE publication type	A4 Article in a conference publication
Event	Materials Research Society Fall Meeting 1992 - Boston, United States Duration: 30 Nov 1992 → 4 Dec 1992

Publication series

Series	Materials Research Society Symposia Proceedings
Volume	294
ISSN	0272-9172

Conference

Conference	Materials Research Society Fall Meeting 1992
Country/Territory	United States
City	Boston
Period	30/11/92 → 4/12/92

Access to Document

10.1557/PROC-294-489

Cite this

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title = "Modelling in-situ matrix diffusion at Palmottu natural analogue study site in SW Finland",

abstract = "Radioactive disequilibria, between U-238, U-234, and Th-230, in crystalline rock adjacent to a fracture, indicates mass transfer of U and Th between water in the fracture and the rock. The matrix diffusion theory was used to interpret the observed profiles of mobilized nuclides around the natural fracture. The interpretation of the profiles was based on the use of uranium series disequilibrium code, URSE, and migration code FTRANS. The model system was characterized using all available site-specific data, and the system evolution was outlined using the geology of the Palmottu site. The simulated concentration profiles, as a function of depth from the fracture surface, indicate that measured profiles can be modelled by matrix diffusion, assuming realistic initial and boundary conditions and diffusion times of 300,000 years.",

author = "Kari Rasilainen and Juhani Suksi",

note = "Project code: YDI9004; Materials Research Society Fall Meeting 1992 ; Conference date: 30-11-1992 Through 04-12-1992",

year = "1993",

doi = "10.1557/PROC-294-489",

language = "English",

isbn = "978-1-558-99189-7",

series = "Materials Research Society Symposia Proceedings",

publisher = "Materials Research Society",

pages = "489--495",

editor = "C.G. Interrante and R.T. Pabalan",

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

address = "United States",

}

Rasilainen, K & Suksi, J 1993, Modelling in-situ matrix diffusion at Palmottu natural analogue study site in SW Finland. in CG Interrante & RT Pabalan (eds), Scientific Basis for Nuclear Waste Management XVI: Symposium V. Materials Research Society, Pittsburgh, Materials Research Society Symposia Proceedings, vol. 294, pp. 489-495, Materials Research Society Fall Meeting 1992, Boston, Massachusetts, United States, 30/11/92. https://doi.org/10.1557/PROC-294-489

Modelling in-situ matrix diffusion at Palmottu natural analogue study site in SW Finland. / Rasilainen, Kari; Suksi, Juhani.
Scientific Basis for Nuclear Waste Management XVI: Symposium V. ed. / C.G. Interrante; R.T. Pabalan. Pittsburgh: Materials Research Society, 1993. p. 489-495 (Materials Research Society Symposia Proceedings, Vol. 294).

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

TY - GEN

T1 - Modelling in-situ matrix diffusion at Palmottu natural analogue study site in SW Finland

AU - Rasilainen, Kari

AU - Suksi, Juhani

N1 - Project code: YDI9004

PY - 1993

Y1 - 1993

N2 - Radioactive disequilibria, between U-238, U-234, and Th-230, in crystalline rock adjacent to a fracture, indicates mass transfer of U and Th between water in the fracture and the rock. The matrix diffusion theory was used to interpret the observed profiles of mobilized nuclides around the natural fracture. The interpretation of the profiles was based on the use of uranium series disequilibrium code, URSE, and migration code FTRANS. The model system was characterized using all available site-specific data, and the system evolution was outlined using the geology of the Palmottu site. The simulated concentration profiles, as a function of depth from the fracture surface, indicate that measured profiles can be modelled by matrix diffusion, assuming realistic initial and boundary conditions and diffusion times of 300,000 years.

AB - Radioactive disequilibria, between U-238, U-234, and Th-230, in crystalline rock adjacent to a fracture, indicates mass transfer of U and Th between water in the fracture and the rock. The matrix diffusion theory was used to interpret the observed profiles of mobilized nuclides around the natural fracture. The interpretation of the profiles was based on the use of uranium series disequilibrium code, URSE, and migration code FTRANS. The model system was characterized using all available site-specific data, and the system evolution was outlined using the geology of the Palmottu site. The simulated concentration profiles, as a function of depth from the fracture surface, indicate that measured profiles can be modelled by matrix diffusion, assuming realistic initial and boundary conditions and diffusion times of 300,000 years.

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DO - 10.1557/PROC-294-489

M3 - Conference article in proceedings

SN - 978-1-558-99189-7

T3 - Materials Research Society Symposia Proceedings

SP - 489

EP - 495

BT - Scientific Basis for Nuclear Waste Management XVI

A2 - Interrante, C.G.

A2 - Pabalan, R.T.

PB - Materials Research Society

CY - Pittsburgh

T2 - Materials Research Society Fall Meeting 1992

Y2 - 30 November 1992 through 4 December 1992

ER -

Modelling in-situ matrix diffusion at Palmottu natural analogue study site in SW Finland

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