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Evaluation of radiation dose due to radioactive materials released into the environment in a nuclear emergency
—Public release of the probabilistic accident effects evaluation code "OSCAAR"—

In order to broadly examine nuclear emergency response, it is crucial to evaluate beforehand the radiation doses due to various nuclear accidents. Therefore, the probabilistic accident effects evaluation code "OSCAAR" was developed by the Japan Atomic Energy Agency (JAEA) for carrying out such evaluation.

OSCAAR evaluates the atmospheric dispersion of radioactive materials released into the environment, and the radiation dose produced in the process of deposition. Through calculations for various weather conditions, the system uses probability to evaluate the effects which different weather conditions have on radiation dose.

Recently, a new package of OSCAAR code was developed, and publicly released on March 30, 2020 for use in research. This package enables OSCAAR analysis to be run on Windows® with improved efficiency in the sequence of evaluation tasks including input data preparation, and post-processing of output data.

The package is expected to be used as a research tool for prior examination of nuclear emergency response, in research evaluating the effects of accidents at nuclear facilities and similar sites by research institutions, universities, nuclear operators, and others.


Outline of accident consequence assessment by using the OSCAAR

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