Decay Heat Removal in GEN IV Gas-Cooled Fast Reactors

Table 1

Passive decay heat removal mechanisms.

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1. Heat Transfer

 radiation/conduction cooldown to

 vessel boundary

 core internal heat sinks (cooled or uncooled)

 primary system heat sinks (cooled or uncooled)

 natural convection heat transport to

 vessel boundary

 core internal heat sinks (cooled or uncooled)

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2. Inertia

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 increasing fuel form thermal inertia

 increasing flow coastdown times

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