# Copyright 2019 TerraPower, LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Thorium Oxide solid ceramic.
Data is from [IAEA-TECDOCT-1450]_.
.. [IAEA-TECDOCT-1450] Thorium fuel cycle -- Potential benefits and challenges, IAEA-TECDOC-1450 (2005).
https://www-pub.iaea.org/mtcd/publications/pdf/te_1450_web.pdf
"""
from armi import runLog
from armi.utils.units import getTk
from armi.materials.material import Material, FuelMaterial, SimpleSolid
[docs]class ThoriumOxide(FuelMaterial, SimpleSolid):
propertyValidTemperature = {"linear expansion": ((298, 1223), "K")}
def __init__(self):
Material.__init__(self)
self.refDens = 10.00
[docs] def setDefaultMassFracs(self):
r"""ThO2 mass fractions. Using Pure Th-232. 100% 232.
Thorium: 232.030806 g/mol
Oxygen: 15.9994 g/mol
2 moles of oxygen/1 mole of Thorium
grams of Th-232 = 232.030806 g/mol* 1 mol = 232.030806 g
grams of Oxygen = 15.9994 g/mol* 2 mol = 31.9988 g
total=264.029606 g.
Mass fractions are computed from this.
"""
self.setMassFrac("TH232", 0.8788)
self.setMassFrac("O16", 0.1212)
[docs] def linearExpansion(self, Tk=None, Tc=None):
r"""Linear expansion in m/m/K from IAEA TE 1450."""
Tk = getTk(Tc, Tk)
self.checkPropertyTempRange("linear expansion", Tk)
return 9.67e-6
[docs] def linearExpansionPercent(self, Tk=None, Tc=None):
"""
Approximate the linear thermal expansion percent from the linear expansion
coefficient, taking 298K as the reference temperature.
"""
Tk = getTk(Tc=Tc, Tk=Tk)
linearExpansionCoef = self.linearExpansion(Tk=Tk)
return 100 * (linearExpansionCoef * (Tk - 298))
[docs] def thermalConductivity(self, Tk=None, Tc=None):
r"""Thermal conductivity in W/m-K from IAEA TE 1450."""
return 6.20
[docs] def meltingPoint(self):
r"""Melting point in K from IAEA TE 1450."""
return 3643.0
[docs] def density(self, Tk=None, Tc=None):
return Material.density(self, Tk, Tc) * self.getTD()
[docs]class ThO2(ThoriumOxide):
"""Another name for ThoriumOxide."""
pass