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balazs's avatar

Hello Mr. Townsend

Just inquiring: are you planning on issueing records of your nuclear conferenc in Australia on the 10th of April on Youtube? I would love to view it, but I cannot make to Sydney in April.

Thank you if you take the time to answer.

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Dan Ryan's avatar

CONTAINMENT - those Big steel and concrete structures used in current nuke plants protect from accident & terrorists in planes. I have never seen SMR account for the need of containment which I believe is their Achilles heel.

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Erik Townsend's avatar

Hi Dan,

SMRs still have to meet containment requirements. One of their greatest advantages is that they are able to do so without needing the big expensive building. Look at the floorplan diagram for the modular nuclear plant. The big steel tubes the containers are housed in satisfy the containment requirements you describe.

Note that one of the reasons it's a "BIG" steel and concrete structure is that one of the requirements for a pressurized water reactor is that the containment building has to be physically voluminous enough to contain the radioactive steam in a core depressurization accident.

Molten salt reactors can't have core depressurization accidents because they don't run pressurized cores, and there's no water to flash to steam, so the containment can be much smaller. I don't know how PWR-based SMRs meet containment requirements, but I'm sure they would be required to.

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