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188 lines
8.3 KiB
Python
188 lines
8.3 KiB
Python
""" Tests for TransferRates class """
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from pathlib import Path
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from math import exp
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import pytest
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import numpy as np
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import openmc
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from openmc.deplete import CoupledOperator
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from openmc.deplete.transfer_rates import TransferRates
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from openmc.deplete.abc import (_SECONDS_PER_MINUTE, _SECONDS_PER_HOUR,
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_SECONDS_PER_DAY, _SECONDS_PER_JULIAN_YEAR)
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CHAIN_PATH = Path(__file__).parents[1] / "chain_simple.xml"
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@pytest.fixture
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def model():
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f = openmc.Material(name="f")
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f.add_element("U", 1, percent_type="ao", enrichment=4.25)
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f.add_element("O", 2)
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f.set_density("g/cc", 10.4)
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w = openmc.Material(name="w")
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w.add_element("O", 1)
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w.add_element("H", 2)
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w.set_density("g/cc", 1.0)
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w.depletable = True
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# material just to test multiple destination material
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h = openmc.Material(name="h")
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h.add_element("He", 1)
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h.set_density("g/cc", 1.78e-4)
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h.depletable = True
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radii = [0.42, 0.45]
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f.volume = np.pi * radii[0] ** 2
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w.volume = np.pi * (radii[1]**2 - radii[0]**2)
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h.volume = 1
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materials = openmc.Materials([f, w, h])
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surf_f = openmc.Sphere(r=radii[0])
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surf_w = openmc.Sphere(r=radii[1], boundary_type='vacuum')
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surf_h = openmc.Sphere(x0=10, r=1, boundary_type='vacuum')
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cell_f = openmc.Cell(fill=f, region=-surf_f)
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cell_w = openmc.Cell(fill=w, region=+surf_f & -surf_w)
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cell_h = openmc.Cell(fill=h, region=-surf_h)
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geometry = openmc.Geometry([cell_f, cell_w, cell_h])
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settings = openmc.Settings()
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settings.particles = 1000
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settings.inactive = 10
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settings.batches = 50
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return openmc.Model(geometry, materials, settings)
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@pytest.mark.parametrize("case_name, transfer_rates", [
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('elements', {'U': 0.01, 'Xe': 0.1}),
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('nuclides', {'I135': 0.01, 'Gd156': 0.1, 'Gd157': 0.01}),
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('nuclides_elements', {'I135': 0.01, 'Gd156': 0.1, 'Gd157': 0.01, 'U': 0.01,
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'Xe': 0.1}),
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('elements_nuclides', {'U': 0.01, 'Xe': 0.1, 'I135': 0.01, 'Gd156': 0.1,
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'Gd157': 0.01}),
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('multiple_transfer', {'U': 0.01, 'Xe': 0.1, 'I135': 0.01, 'Gd156': 0.1,
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'Gd157': 0.01}),
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('rates_invalid_1', {'Gd': 0.01, 'Gd157': 0.01, 'Gd156': 0.01}),
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('rates_invalid_2', {'Gd156': 0.01, 'Gd157': 0.01, 'Gd': 0.01}),
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('rates_invalid_3', {'Gb156': 0.01}),
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('rates_invalid_4', {'Gb': 0.01})
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])
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def test_get_set(model, case_name, transfer_rates):
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"""Tests the get/set methods"""
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op = CoupledOperator(model, CHAIN_PATH)
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transfer = TransferRates(op, model)
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# Test by Openmc material, material name and material id
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material, dest_material, dest_material2 = [m for m in model.materials
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if m.depletable]
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for material_input in [material, material.name, material.id]:
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for dest_material_input in [dest_material, dest_material.name,
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dest_material.id]:
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if case_name == 'rates_invalid_1':
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with pytest.raises(ValueError, match='Cannot add transfer '
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'rate for nuclide Gd157 to material 1 '
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'where element Gd already has a '
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'transfer rate.'):
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for component, transfer_rate in transfer_rates.items():
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transfer.set_transfer_rate(material_input,
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[component],
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transfer_rate)
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elif case_name == 'rates_invalid_2':
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with pytest.raises(ValueError, match='Cannot add transfer '
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f'rate for element Gd to material 1 with '
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r'transfer rate\(s\) for nuclide\(s\) '
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'Gd156, Gd157.'):
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for component, transfer_rate in transfer_rates.items():
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transfer.set_transfer_rate(material_input,
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[component],
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transfer_rate)
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elif case_name == 'rates_invalid_3':
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with pytest.raises(ValueError, match='Gb156 is not a valid '
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'nuclide or element.'):
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for component, transfer_rate in transfer_rates.items():
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transfer.set_transfer_rate(material_input,
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[component],
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transfer_rate)
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elif case_name == 'rates_invalid_4':
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with pytest.raises(ValueError, match='Gb is not a valid '
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'nuclide or element.'):
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for component, transfer_rate in transfer_rates.items():
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transfer.set_transfer_rate(material_input,
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[component],
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transfer_rate)
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else:
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for component, transfer_rate in transfer_rates.items():
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transfer.set_transfer_rate(material_input, [component],
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transfer_rate,
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destination_material=\
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dest_material_input)
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assert transfer.get_transfer_rate(
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material_input, component)[0] == transfer_rate
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assert transfer.get_destination_material(
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material_input, component)[0] == str(dest_material.id)
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assert transfer.get_components(material_input) == \
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transfer_rates.keys()
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if case_name == 'multiple_transfer':
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for dest2_material_input in [dest_material2, dest_material2.name,
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dest_material2.id]:
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for component, transfer_rate in transfer_rates.items():
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transfer.set_transfer_rate(material_input, [component],
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transfer_rate,
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destination_material=\
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dest2_material_input)
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for id, dest_mat in zip([0,1],[dest_material,dest_material2]):
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assert transfer.get_transfer_rate(
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material_input, component)[id] == transfer_rate
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assert transfer.get_destination_material(
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material_input, component)[id] == str(dest_mat.id)
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@pytest.mark.parametrize("transfer_rate_units, unit_conv", [
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('1/s', 1),
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('1/sec', 1),
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('1/min', _SECONDS_PER_MINUTE),
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('1/minute', _SECONDS_PER_MINUTE),
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('1/h', _SECONDS_PER_HOUR),
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('1/hr', _SECONDS_PER_HOUR),
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('1/hour', _SECONDS_PER_HOUR),
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('1/d', _SECONDS_PER_DAY),
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('1/day', _SECONDS_PER_DAY),
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('1/a', _SECONDS_PER_JULIAN_YEAR),
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('1/year', _SECONDS_PER_JULIAN_YEAR),
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])
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def test_units(transfer_rate_units, unit_conv, model):
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""" Units testing"""
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# create transfer rate Xe
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components = ['Xe', 'U235']
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transfer_rate = 1e-5
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op = CoupledOperator(model, CHAIN_PATH)
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transfer = TransferRates(op, model)
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for component in components:
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transfer.set_transfer_rate('f', [component], transfer_rate * unit_conv,
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transfer_rate_units=transfer_rate_units)
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assert transfer.get_transfer_rate('f', component)[0] == transfer_rate
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def test_transfer(run_in_tmpdir, model):
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"""Tests transfer depletion class without neither reaction rates nor decay
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but only transfer rates"""
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# create transfer rate for U
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element = ['U']
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transfer_rate = 1e-5
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op = CoupledOperator(model, CHAIN_PATH)
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integrator = openmc.deplete.PredictorIntegrator(
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op, [1,1], 0.0, timestep_units = 'd')
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integrator.add_transfer_rate('f', element, transfer_rate)
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integrator.integrate()
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# Get number of U238 atoms from results
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results = openmc.deplete.Results('depletion_results.h5')
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_, atoms = results.get_atoms(model.materials[0], "U238")
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# Ensure number of atoms equal transfer decay
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assert atoms[1] == pytest.approx(atoms[0]*exp(-transfer_rate*3600*24))
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assert atoms[2] == pytest.approx(atoms[1]*exp(-transfer_rate*3600*24))
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