Process for pressure relief of a nuclear power plant, pressure relief system for a nuclear power plant and associated nuclear power plant

摘要

The invention relates to a method and a corresponding device for relieving the pressure of a nuclear power plant (2) with a safety cover (4) for enclosing activity carriers and with an outlet (10) for a relief flow, the relief flow being provided via a relief line (12) provided with a filter system. from the safety cover (4) into the atmosphere, the filter system comprising a filter chamber (16) with a filter chamber inlet (84), a filter chamber outlet (86) and an intermediate sorbent filter (18), the relief flow in a high pressure section (38 ) the relief line (12) is at least partially led past the filter chamber (16) and this is heated by heat transfer, and the relief flow at the end of the high-pressure section (38) is expanded and dried by expansion at a throttle (40). In order to enable a particularly efficient and effective retention of activity carriers contained in the relief flow, in particular of iodine-containing organic compounds, the invention provides that the relief flow - subsequently passed through a sand or gravel bed filter (14) - then in an overheating section (50 ) past the high-pressure section (38) of the relief line (12) and thereby heated by heat transfer, - is then passed directly through the filter chamber (16) with the sorbent filter (18) in this state, and - is finally blown out into the atmosphere ,