# 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.
"""Cesium."""
from armi.materials.material import Fluid
from armi.utils.units import getTk
[docs]class Cs(Fluid):
"""Cesium."""
[docs] def setDefaultMassFracs(self):
self.setMassFrac("CS133", 1.0)
[docs] def pseudoDensity(self, Tk=None, Tc=None):
"""The 2D/3D density of liquid Cesium.
https://en.wikipedia.org/wiki/Caesium
Notes
-----
In ARMI, we define pseudoDensity() and density() as the same for Fluids.
"""
Tk = getTk(Tc, Tk)
if Tk < self.meltingPoint():
return 1.93 # g/cm3
else:
return 1.843 # g/cm3
[docs] def meltingPoint(self):
return 301.7 # K