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BURST PROTECTION DEVICE FOR PRESSURE VESSELS IN NUCLEAR REACTOR PLANTS, IN PARTICULAR FOR REACTOR PRESSURE VESSELS
BURST PROTECTION DEVICE FOR PRESSURE VESSELS IN NUCLEAR REACTOR PLANTS, IN PARTICULAR FOR REACTOR PRESSURE VESSELS
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机译：核反应堆中压力容器的爆破保护装置，特别是反应堆压力容器的爆破保护装置
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摘要
The pressure vessel closure head (3) is clamped in a sealing fashion with its closure head flange (3.1) by means of prestressed expansion bolts (4) having nuts (4.2) and washers (U1) against the counter-flange (2.1) of a pressure vessel opening. In this arrangement, the washers (U1) are constructed as deformation members and are dimensioned to match the expansion bolts (4) in such a way that upon overshooting of a limiting internal pressure they give way to the closure head forces, under plastic deformation, by the distance DELTA lü in the pressing-on direction. The reduction in the overpressure takes place via the closure head sealing gap (5) which gapes correspondingly by an axial gap of DELTA lü, as far as a value at which the prestressing force of the bolts (4) remaining in the elastic range is sufficient to reseal the pressure vessel (1). IMAGE
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