last modified: 09-OCT-2003 | catalog | categories | new | search |

NEA-1570 SITE-94

SITE-94, Biosphere Model for SKI Project on the island of Aspro

top ]
1. NAME OR DESIGNATION OF PROGRAM:  SITE-94.
top ]
2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
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
top ]
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.
top ]
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.
top ]
5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

  The biosphere model is of a rough and primitive character and the results produced may differ from the real biosphere in the surroundings of Aspo by several orders of magnitude.
top ]
6. TYPICAL RUNNING TIME:  Negligible.
top ]
7. UNUSUAL FEATURES:  None that the author is aware of.
top ]
8. RELATED OR AUXILIARY PROGRAMS

The present model can be run on a stand-alone basis. Quantitative input can also be taken from other SITE94 modules.
Another simple biosphere model concept has been developed later by the author involving fuzzy distribution functions. See references.
top ]
9. STATUS
Package ID Status date Status
NEA-1570/01 09-OCT-2003 Tested at NEADB
top ]
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)
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
top ]
11. HARDWARE REQUIREMENTS
top ]
12. PROGRAMMING LANGUAGE(S) USED

No item found

top ]
13. SOFTWARE REQUIREMENTS

Windows 95/NT (or later). The model is written in EXCEL 97.
top ]
14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
top ]
15. NAME AND ESTABLISHMENT OF AUTHORS

Runo Alfons Gunnar Barrdahl
Swedish Institute of Radiation Protection (SSI)
171 16 STOCKHOLM
Sweden
Tel: +46-8-729 72 58
Fax: +46-8-729 71 08
e-mail: runo.barrdahl@ssi.se
top ]
16. MATERIAL AVAILABLE
NEA-1570/01
SITE94 Bioshpere Model.XLS Tables on EXCEL
SITE94 Biosphere Model.doc Program report
SITE94 Biosphere Model - Abstract.doc Program abstract
top ]
17. CATEGORIES
  • G. Radiological Safety, Hazard and Accident Analysis
  • R. Environmental and Earth Sciences

Keywords: environmental effects, environmental impacts, ground water, leakage, radioactive waste storage.