TY JOUR TI THE PROBLEM OF PROTECTION FROM DANGEROUS EMERCOM FACTORS KW neutron radiation KW gamma radiation KW maximum permissible dose KW biological protection JO NATURAL AND MAN-MADE RISKS (PHYSICO-MATHEMATICAL AND APPLIED ASPECTS) AU Labinskiy, A.Y. PY 2018 IS 2018 PB Saint-Petersburg University of State Fire Service of Emercom of Russia