Hostname: page-component-848d4c4894-8kt4b Total loading time: 0 Render date: 2024-06-25T04:52:27.937Z Has data issue: false hasContentIssue false
  • English
  • Français

Principal Component Analyses of Potential Repository Groundwaters

Published online by Cambridge University Press:  10 February 2011

H. Sasamoto ,
P. Salter ,
M. Apted  and
M. Yuiv
H. Sasamoto
Affiliation:
Japanese Nuclear Fuel Cycle Development Institute (JNC), Tokai Works, Japan
P. Salter
Affiliation:
QuantiSci Inc., Denver, Colorado USA
M. Apted
Affiliation:
QuantiSci Inc., Denver, Colorado USA
M. Yuiv
Affiliation:
Japanese Nuclear Fuel Cycle Development Institute (JNC), Tokai Works, Japan
Get access

Abstract

The chemical composition of ambient groundwater for a geological, high level radioactive waste repository is of crucial significance to issues such as radioelement solubility limits, sorption, corrosion of the overpack, behavior of compacted clay buffers, and many other factors involved in repository safety assessment. At this time, there are no candidate repository sites established in Japan for the geological disposal of high-level radioactive waste, and only generic rock formations are under consideration. It is important that a small, but representative set of groundwater types be identified so that defensible models and data for generic repository performance assessment can be established. Over 15,000 separate analyses of Japanese groundwaters have been compiled into a data set for the purpose of evaluating the range of geochemical conditions for waste repositories in Japan. This paper demonstrates the use of a multivariate statistical analysis technique, principal component analysis (PCA), to derive a set of statistically based, representative groundwater categories from the multiple chemical components and temperature that characterize the deep Japanese groundwater analyses. PCA also can be used to guide the selection of groundwaters that could be used in scenario analyses of future geological events in Japan.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 556: Symposium QQ – Scientific Basis for Nuclear Waste Management XXII , 1999 , 575
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Piper, A. M., “A Graphic Procedure in the Geochemical Interpretation of Water Analyses,” Trans. Ami. Geophys. Union, Vol.25. 1944.Google Scholar
[2] Zaporosec, A. M., “Graphical Interpretation of Water Quality Data,” Groundwater, Vol.10, # 2., 1972.Google Scholar
[3] Lawrence, F. W. and Upchurch, S. B., “Identification of Recharge Areas Using Geochemical Factor Analysis,” Groundwater, V. 20, # 6, 1982.Google Scholar
[4] Lawrence, F. W. and Upchurch, S. B., “Identification of Geochemical Patterns in Groundwater by Numerical Analysis,” Proc. 12th Annual Symnp. Advances in Groundwater Hydrology, Am. Water Resources Assoc., Washington, D. C., 1976.Google Scholar
[5] Dalton, M. G. and Upchurch, S. B., “Interpretation of Hydrochemical Facies by Factor Analysis,” Groundwater, V. 16, # 4, 1978.Google Scholar
[6] Smellie, J. A. T. and Laaksoharju, M., The Aspo Hard Rock Laboratory: Final Evaluation of the Hydrogeochernical Pre-Investigations in Relation to Existing Geologic and Hydraulic Conditions, SKB Technical Report 92-31, Swedish Nuclear Fuel and Waste Management Company, Stockholm, Sweden, 1992.Google Scholar
[7] Cave, M. and Metcalfe, R., “Multivariate Statistical Analysis of Sellafield Groundwater Composition Data,” British Geological Survey Analytical Geochemistry Series Technical Report, WI/95/13C, 1995.Google Scholar
[8] JNC, Geostatistical Analysis of Groundwater Chemistry in Japan: Evaluation of the Base Case Groundwater Data Set, JNC TN8400 99-023, Tokai Works, JNC, Tokyo, Japan, 1999.Google Scholar
[9] Pirouette® [Multivariate Data Analysis for IBC PC Systems] User's Manual. Pirouette® is available from Info Metrix Inc., P. O. Box 1528, Woodinville, WA 98071.Google Scholar