Hastelloy-N

Cladding & Structural

Density: 8.86 g/cm³

Atom density: 0.0868697 atoms/b·cm

Nickel–molybdenum alloy developed for molten-salt service. The structural material of the MSRE and of most proposed MSR designs.

Where these numbers come from

Nominal INOR-8 / Alloy N composition (Ni 71, Mo 16, Cr 7, Fe 5, Si 0.5, Mn 0.5 wt%) and density carried over from the previous NRDP entry. Not in the compendium and not re-derived here.

Material compositions from PNNL-15870 Rev. 2 (April 2021), R.S. Detwiler, R.J. McConn Jr., T.F. Grimes, S.A. Upton, and E.J. Engel, Compendium of Material Composition Data for Radiation Transport Modeling, Pacific Northwest National Laboratory. Full report (DOI 10.2172/1782721)

Composition

Nuclide (ZAID)	Weight fraction	Atom fraction	Atom density (atoms/b·cm)
Si-28 (14028)	4.6111e-3	1.0123e-2	8.7942e-4
Si-29 (14029)	2.3425e-4	4.9654e-4	4.3134e-5
Si-30 (14030)	1.5460e-4	3.1680e-4	2.7520e-5
Cr-50 (24050)	3.0415e-3	3.7403e-3	3.2492e-4
Cr-52 (24052)	5.8652e-2	6.9358e-2	6.0251e-3
Cr-53 (24053)	6.6507e-3	7.7160e-3	6.7029e-4
Cr-54 (24054)	1.6555e-3	1.8851e-3	1.6376e-4
Mn-55 (25055)	5.0000e-3	5.5900e-3	4.8560e-4
Fe-54 (26054)	2.9225e-3	3.3278e-3	2.8909e-4
Fe-56 (26056)	4.5877e-2	5.0376e-2	4.3762e-3
Fe-57 (26057)	1.0595e-3	1.1430e-3	9.9289e-5
Fe-58 (26058)	1.4100e-4	1.4949e-4	1.2986e-5
Ni-58 (28058)	4.8335e-1	5.1243e-1	4.4514e-2
Ni-60 (28060)	1.8618e-1	1.9081e-1	1.6576e-2
Ni-61 (28061)	8.0933e-3	8.1583e-3	7.0871e-4
Ni-62 (28062)	2.5806e-2	2.5594e-2	2.2234e-3
Ni-64 (28064)	6.5711e-3	6.3134e-3	5.4844e-4
Mo-92 (42092)	2.3248e-2	1.5536e-2	1.3496e-3
Mo-94 (42094)	1.4640e-2	9.5756e-3	8.3183e-4
Mo-95 (42095)	2.5344e-2	1.6402e-2	1.4248e-3
Mo-96 (42096)	2.6672e-2	1.7082e-2	1.4839e-3
Mo-97 (42097)	1.5360e-2	9.7355e-3	8.4572e-4
Mo-98 (42098)	3.9024e-2	2.4482e-2	2.1267e-3
Mo-100 (42100)	1.5712e-2	9.6594e-3	8.3911e-4

This is the material as formulated. The cards below carry weight fractions, written negative, which is what MCNP and Serpent read as a mass basis.

Generated material cards

MCNP

c Hastelloy-N
c ReactorMC NRDP derived material - reactormc.net/nrdp/material/hastelloy-n; rho
c = 8.86 g/cm3 (use -8.86 on the cell card)
m14    14028.80c  -0.004611  $ Si28
       14029.80c  -2.3425e-4  $ Si29
       14030.80c  -1.5460e-4  $ Si30
       24050.80c  -0.003042  $ Cr50
       24052.80c  -0.058652  $ Cr52
       24053.80c  -0.006651  $ Cr53
       24054.80c  -0.001656  $ Cr54
       25055.80c  -0.005000  $ Mn55
       26054.80c  -0.002922  $ Fe54
       26056.80c  -0.045877  $ Fe56
       26057.80c  -0.001059  $ Fe57
       26058.80c  -1.4100e-4  $ Fe58
       28058.80c  -0.483346  $ Ni58
       28060.80c  -0.186184  $ Ni60
       28061.80c  -0.008093  $ Ni61
       28062.80c  -0.025806  $ Ni62
       28064.80c  -0.006571  $ Ni64
       42092.80c  -0.023248  $ Mo92
       42094.80c  -0.014640  $ Mo94
       42095.80c  -0.025344  $ Mo95
       42096.80c  -0.026672  $ Mo96
       42097.80c  -0.015360  $ Mo97
       42098.80c  -0.039024  $ Mo98
       42100.80c  -0.015712  $ Mo100

MCNP and Serpent cards use .80c (ENDF/B-VII.1 at 293.6 K) — renumber m1 and change the suffix to match your deck. SCONE compositions are atom densities in atoms/barn-cm with the .03 suffix matching temp 300. See the library reference before changing a suffix: the mapping is not portable between vendors.

Notes

Also called INOR-8 or Alloy N. Developed at ORNL for fluoride salt compatibility; the titanium-modified version resists irradiation embrittlement better.

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