Graphite
C
Moderators & CoolantsDensity: 1.7 g/cm³
Nuclear-grade graphite moderator. Used in gas-cooled reactors (AGR, HTGR), RBMK, and molten salt reactors.
Composition
| Nuclide / Element | Fraction |
|---|---|
| Carbon (natural) | 1.000000 |
S(α,β) required: grph
Code output
MCNP
c Nuclear Graphite
c Density: 1.70 g/cm3 (use -1.70 on cell card)
m18 6000.80c 1.000000 $ C (natural)
mt18 grph.20tNotes
Density varies 1.6–1.8 g/cm³ depending on grade and irradiation history. Nuclear-grade graphite is purified to <5 ppm boron-equivalent impurities.