Category Archives: Design of Reactor Containment Systems for Nuclear Power Plants

Identification and quantification of loads

4.53. All loads (static and dynamic) that are expected to occur over the plant lifetime or that are associated with postulated design basis accidents should be identified and grouped according to their probability of occurrence, on the basis of operating experience and engineering judgement. Such loads should be specified for each component of the containment structure.

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Air locks, doors and hatches

4.190. Penetrations (containment air locks) for access by personnel or equipment to the containment are required to have air locks equipped with doors that are interlocked to ensure that at least one of the doors is closed during reactor operations and in design basis accidents (Ref. [1], para. 6.58). In addition, they are required to be designed to prevent any […]

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Inherent energy management features

4.88. The free volume of the space within the containment envelope is the primary physical parameter determining peak pressures after postulated pipe rupture events. It can thus be used as an inherently safe and reliable design feature. If the volume of the containment is subdivided into compartments that are provided with collapsing panels or louvres that open in the event […]

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Pressure suppression pool

4.138. Water pools or tanks through which the containment atmosphere is bubbled for steam condensation should be considered a valuable means for the removal of radioactive products. However, care should be taken in evaluating the efficiency of such a process, since it is dependent on the thermodynamic conditions of water and steam. For example, the degree of subcooling of the […]

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For new plants, a secondary confinement should be used. MANAGEMENT OF COMBUSTIBLE GASES

5.52. In a severe accident, a large amount of hydrogen might be released to the atmosphere of the containment, possibly exceeding the ignition limit and jeopardizing the integrity of the containment. In the event of interactions between molten core material and concrete, carbon monoxide might also be released, contributing to the hazard. To assess the need to install special features […]

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