TY JOUR TI FIRE PROTECTION SYSTEMS EXAMINATION AT THE SPECIAL TECHNICAL CONDITIONS APPROVAL STAGE KW emergency situations KW special technical conditions KW fire simulation KW maximum heat flux density KW fire risk JO Problems of risk management in the technosphere AU Vytovtov, A.V. AU Kalach, A.V. AU Ageev, P.M. PY 2024 IS 2024 PB Saint-Petersburg University of State Fire Service of Emercom of Russia