Category Archives: DESIGN FEATURES TO ACHIEVE. DEFENCE IN DEPTH IN SMALL AND. MEDIUM SIZED REACTORS

SUMMARY AND CONCLUSIONS

This report presents a description of design features used to achieve defence in depth in eleven concepts of small and medium sized reactors (SMRs), representing different reactor lines. The descriptions are structured to follow the definitions and recommendations of IAEA safety standard Safety of Nuclear Power Plants: Design [7], with some references made to other IAEA safety standards and publications, […]

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Residual heat removal system (RHRS)

The RHRS is a simple and reliable system that operates by condensing steam from the primary system in the emergency condensers. The emergency condensers are heat exchangers consisting of an arrangement of parallel horizontal U tubes located between the two common headers. The top header is connected to the reactor vessel steam dome, while the lower header is connected to […]

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Beyond design basis accidents (BDBA)

For the SCOR, transients leading to an extension of design basis conditions are either eliminated by design or managed using the following passive provisions: • H1 (total loss of the heat sink): the SCOR concept is based on several independent decay heat removal (RRP) loops ready to operate in a passive mode with a heat sink either in the pools […]

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