Sensitivity analysis of EQ3 [electronic resource]
A sensitivity analysis of EQ3, a computer code which has been proposed to be used as one link in the overall performance assessment of a national high-level waste repository, has been performed. EQ3 is a geochemical modeling code used to calculate the speciation of a water and its saturation state w...
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| Online Access: |
Online Access (via OSTI) |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Office of the Assistant Secretary for Nuclear Energy ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
1990.
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| Subjects: |
MARC
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| 245 | 0 | 0 | |a Sensitivity analysis of EQ3 |h [electronic resource] |
| 260 | |a Washington, D.C. : |b United States. Office of the Assistant Secretary for Nuclear Energy ; |a Oak Ridge, Tenn. : |b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy, |c 1990. | ||
| 300 | |a Pages: (52 p) : |b digital, PDF file. | ||
| 336 | |a text |b txt |2 rdacontent. | ||
| 337 | |a computer |b c |2 rdamedia. | ||
| 338 | |a online resource |b cr |2 rdacarrier. | ||
| 500 | |a Published through SciTech Connect. | ||
| 500 | |a 01/01/1990. | ||
| 500 | |a "ornl/tm-11407" | ||
| 500 | |a "DE90006442" | ||
| 500 | |a Horwedel, J.E.; Wright, R.Q.; Maerker, R.E. | ||
| 520 | 3 | |a A sensitivity analysis of EQ3, a computer code which has been proposed to be used as one link in the overall performance assessment of a national high-level waste repository, has been performed. EQ3 is a geochemical modeling code used to calculate the speciation of a water and its saturation state with respect to mineral phases. The model chosen for the sensitivity analysis is one which is used as a test problem in the documentation of the EQ3 code. Sensitivities are calculated using both the CHAIN and ADGEN options of the GRESS code compiled under G-float FORTRAN on the VAX/VMS and verified by perturbation runs. The analyses were performed with a preliminary Version 1.0 of GRESS which contains several new algorithms that significantly improve the application of ADGEN. Use of ADGEN automates the implementation of the well-known adjoint technique for the efficient calculation of sensitivities of a given response to all the input data. Application of ADGEN to EQ3 results in the calculation of sensitivities of a particular response to 31,000 input parameters in a run time of only 27 times that of the original model. Moreover, calculation of the sensitivities for each additional response increases this factor by only 2.5 percent. This compares very favorably with a running-time factor of 31,000 if direct perturbation runs were used instead. 6 refs., 8 tabs. | |
| 536 | |b AC05-84OR21400. | ||
| 650 | 7 | |a Geochemistry. |2 local. | |
| 650 | 7 | |a Mathematical Models. |2 local. | |
| 650 | 7 | |a High-Level Radioactive Wastes. |2 local. | |
| 650 | 7 | |a Underground Disposal. |2 local. | |
| 650 | 7 | |a Radionuclide Migration. |2 local. | |
| 650 | 7 | |a Sensitivity Analysis. |2 local. | |
| 650 | 7 | |a E Codes. |2 local. | |
| 650 | 7 | |a Performance Testing. |2 local. | |
| 650 | 7 | |a Radioactive Waste Disposal. |2 local. | |
| 650 | 7 | |a Chemistry. |2 local. | |
| 650 | 7 | |a Computer Codes. |2 local. | |
| 650 | 7 | |a Environmental Transport. |2 local. | |
| 650 | 7 | |a Management. |2 local. | |
| 650 | 7 | |a Mass Transfer. |2 local. | |
| 650 | 7 | |a Materials. |2 local. | |
| 650 | 7 | |a Radioactive Materials. |2 local. | |
| 650 | 7 | |a Radioactive Wastes. |2 local. | |
| 650 | 7 | |a Testing. |2 local. | |
| 650 | 7 | |a Waste Disposal. |2 local. | |
| 650 | 7 | |a Waste Management. |2 local. | |
| 650 | 7 | |a Wastes. |2 local. | |
| 650 | 7 | |a Management Of Radioactive And Non-Radioactive Wastes From Nuclear Facilities. |2 edbsc. | |
| 650 | 7 | |a General And Miscellaneous//Mathematics, Computing, And Information Science. |2 edbsc. | |
| 710 | 2 | |a Oak Ridge National Laboratory. |4 res. | |
| 710 | 1 | |a United States. |b Office of the Assistant Secretary for Nuclear Energy. |4 spn. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Scientific and Technical Information. |4 dst. | |
| 856 | 4 | 0 | |u http://www.osti.gov/scitech/biblio/7079359 |z Online Access (via OSTI) |
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