In reply to  Jed Rothwell's message of Tue, 21 Jun 2022 11:53:47 -0400:
Hi,

Looking through the list I see that the highest power density is 438 kW/l. This 
is for an experimental fast neutron
reactor, which uses a 3 loop cooling system, sodium - sodium - water.
I would have thought it would make more sense to use gallium in the second 
loop. That nicely keeps the sodium and water
separate, in case of leaks, thus largely avoiding the risk of fire.
Gallium is not used in the primary loop because of its neutron absorption cross 
section.


>I wrote:
>
>
>> Regarding fission reactor power density, I finally found this, by the way:
>>
>> https://aris.iaea.org/sites/core.html
>>
>> I think one of the column headings is incorrect. It says:
>>
>> Average core power density [kW/kgU]
>>
>> I think it should say:
>>
>> Average Core power density [kW/l]
>>
>
>I wrote to the people at the IAEA. They confirmed this is a mistake in the
>column heading. It should be [kW/l].
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