NEA-1570 SITE-94
SITE-94, Biosphere Model for SKI Project on the island of Aspro
NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM OR FUNCTION, METHODS, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES, RELATED OR AUXILIARY PROGRAMS, STATUS, REFERENCES, REQUIREMENTS, LANGUAGE, SOFTWARE REQUIREMENTS, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| SITE-94 | NEA-1570/01 | Tested | 09-OCT-2003 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| NEA-1570/01 | PC Windows | PC Windows,PC Pentium III |
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3. DESCRIPTION OF PROGRAM OR FUNCTION
A simple biosphere model has been designed for use in the SKI project related to a hypothetical repository for spent nuclear fuel on the island of Aspro near Oskarshamn in Southern Sweden.
Project SITE-94 studies the safety aspects of this hypothetical repository. Any weakness in repository performance will reveal itself as a leakage of radionuclides out of the repository, and finally into the biosphere where man and nature are at risk of being exposed. Thus,as the final link in estimating such leakage, a biosphere model will provide an estimate of resulting radiation impact on man and nature.
A simple biosphere model has been designed for use in the SKI project related to a hypothetical repository for spent nuclear fuel on the island of Aspro near Oskarshamn in Southern Sweden.
Project SITE-94 studies the safety aspects of this hypothetical repository. Any weakness in repository performance will reveal itself as a leakage of radionuclides out of the repository, and finally into the biosphere where man and nature are at risk of being exposed. Thus,as the final link in estimating such leakage, a biosphere model will provide an estimate of resulting radiation impact on man and nature.
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4. METHODS
The present biosphere model involves a stationary scenario (Reference Scenario) and a climate evolution and geological scenario (Central Scenario). The stationary and time evolution scenarios contain as primary recipients a well and the bay of Borholm, i.e., the waters surrounding the island of Aspo. The time evolution scenario additionally incorporates as primary recipients a waste sample from intrusion and, in a remote future time, the Baltic Sea.
Transport of radionuclides within the model system is assumed to be essentially immediate, except for in sediment subject to land rise. Except for this pathway, radioactive decay is therefore not included at all in the model. Land rise sediment is modeled to be subject to radioactive decay from the time the sediment no longer constitutes sea bottom until the desired time point of the model. Correction for radioactive decay is thus generally supposed to be made outside the biosphere model.
Unless otherwise indicated, yearly individual and population committed (50 years) radiation doses to man are considered, and all scenarios involve a constant flux of 1 Bq/y of each radionuclide considered into the respective primary recipient. Nominal values of radionuclide flux will finally be multiplied with the radiation dose per one Bq per year resulting from the model in order to obtain scaled radiation doses.
The present biosphere model involves a stationary scenario (Reference Scenario) and a climate evolution and geological scenario (Central Scenario). The stationary and time evolution scenarios contain as primary recipients a well and the bay of Borholm, i.e., the waters surrounding the island of Aspo. The time evolution scenario additionally incorporates as primary recipients a waste sample from intrusion and, in a remote future time, the Baltic Sea.
Transport of radionuclides within the model system is assumed to be essentially immediate, except for in sediment subject to land rise. Except for this pathway, radioactive decay is therefore not included at all in the model. Land rise sediment is modeled to be subject to radioactive decay from the time the sediment no longer constitutes sea bottom until the desired time point of the model. Correction for radioactive decay is thus generally supposed to be made outside the biosphere model.
Unless otherwise indicated, yearly individual and population committed (50 years) radiation doses to man are considered, and all scenarios involve a constant flux of 1 Bq/y of each radionuclide considered into the respective primary recipient. Nominal values of radionuclide flux will finally be multiplied with the radiation dose per one Bq per year resulting from the model in order to obtain scaled radiation doses.
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10. REFERENCES
- R. Barrdahl:
"Fuzzy, can that be precise. Fuzzy distributions in probabilistic environmental impact assessment: Application to a high-level waste repository." SSI News, Vol. 5, No. 2 (1997)
- R. Barrdahl:
"Fuzzy, can that be precise. Fuzzy distributions in probabilistic environmental impact assessment: Application to a high-level waste repository." SSI News, Vol. 5, No. 2 (1997)
NEA-1570/01, included references:
- R. Barrdahl:A BIOSPHERE MODEL for use in the SKI Project SITE-94
(March 29 1995)
- R. Barrdahl:
"Biosphere model for high level waste repository."
Risk Analysis, Vol. 17, No. 5 (1997)
- Swedish Radiation Protection Institute:
SSI News, Vol. 5, No. 2 (December 1997)
- R. Barrdahl:
Readme, abstract and general information
- Excel tables printouts
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NEA-1570/01
SITE94 Bioshpere Model.XLS Tables on EXCELSITE94 Biosphere Model.doc Program report
SITE94 Biosphere Model - Abstract.doc Program abstract
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- G. Radiological Safety, Hazard and Accident Analysis
- R. Environmental and Earth Sciences
Keywords: environmental effects, environmental impacts, ground water, leakage, radioactive waste storage.