Examination of the Potential Problems Resulting from the Settling of U5 Procedure (Filtered Venting of the Containment) on French PWR'S (Pressurized Water Reactors)

摘要

A filtered venting system of the containment including a sand bed (U5 procedure) is now settled on French PWR's. In this paper, one reviews the problems which are raised, concerning either the efficiency of the system or the safety of the nuclear unit. Two types of situations are examined: design situations, for which the U5 procedure is not used, and hypothetical accidental situations, for which the U5 procedure could be used. (ERA citation 14:007811)