Sodium

Na

Moderators & Coolants

Density: 0.968 g/cm³

Liquid sodium coolant at ~100°C. Primary coolant in sodium-cooled fast reactors (SFRs) such as EBR-II, BN-600/800, and proposed designs like Natrium.

Composition

Nuclide / ElementFraction
Na-231.000000

Code output

MCNP
c Sodium (liquid, ~100°C)
c Density: 0.968 g/cm3 (use -0.968 on cell card)
m23   11023.80c  1.000000  $ Na-23

SCONE reads ACE libraries: build nuclearData.materials entries from these nuclides using ZAID plus a temperature/table suffix that exists in your aceLibrary, with number densities in atoms/barn-cm. See the SCONE nuclear data tutorial and the NRDP library reference.

Notes

Density at ~100°C. At typical SFR operating temperature (~500°C), density is ~0.856 g/cm³. Na-23 is monoisotopic.

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