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The amount of industrial waste slag as building material accounts for an important proportion at reuse kinds of industrial waste slag.If we do not limit industrial waste slag as building material,additional dose burden may be arise higher to dweller because some radionuclide activity concentration of industrial waste slag is very high.According to additional dose limitation per year and relative laws and standards,radioactivity concentration of industrial waste slag as building material is limited.Three kinds of industrial waste slags are controlled according to equivalent concentration,which can guide building material product and can control the effective dose of dweller from source.