Ag-In-Cd Control Rod

Ag-In-Cd

Absorbers

Density: 10.17 g/cm³

Silver-indium-cadmium alloy (80-15-5 wt%). Standard control rod absorber material in PWRs, providing absorption across a wide energy range.

Composition

Nuclide / Element	Fraction
Silver	0.800000
Indium	0.150000
Cadmium	0.050000

Code output

MCNP

c Ag-In-Cd Control Rod (80/15/5 wt%)
c Density: 10.17 g/cm3 (use -10.17 on cell card)
c Weight fractions with natural elements
m34   47000.80c -0.80  $ Ag (natural)
      49000.80c -0.15  $ In (natural)
      48000.80c -0.05  $ Cd (natural)

Notes

Ag absorbs epithermal neutrons, In absorbs at 1.46 eV resonance, Cd has a strong thermal cutoff at 0.5 eV. Combined, they provide effective absorption across a wide energy range.

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