FIELD: nuclear power engineering. SUBSTANCE: method involves heating of molecular sieve mounted on outlet line by high-pressure relief flow, drying of pressure-relief flow by expanding upon passage through metal-fiber filter, bringing of pressure-relief flow in direct contact with molecular sieve; metal-fiber filter is operated at pressure making up at least 1.2 of pressure on molecular sieve. Pressure-relief device has additional molecular sieve installed in cylindrical tank and having annular shape. Molecular sieve is placed in pressure-relief gas flow region with high pressure and has throttle mounted downstream of metal-fiber filter at molecular sieve inlet. EFFECT: provision for filtering off iodine during pressure relief in reactor containment; reduced cost and failure probability. 11 cl, 5 dwg
