Assessment of permissible releases in case of accidental loss of coolant and sodium coolant burning

Assessment of permissible releases in case of maximum credible accident of SNR reactor (loss of coolant in primary burning) is carried out. Attention is paid to release of radioactive aerosols to service rooms and to assessment of permissible single ejections to atmosphere. In case of aerosols release to neibouring rooms internal irradiation of people due to radioactive aerosols intake through respiratory system is defining. Radiation hazard from aerosols, resulting from coolant burning, is mainly contributed by 24Na. To reduce irradiation doses decrease 137Cs content in coolant is recommended