38 lines
1.4 KiB
Python
38 lines
1.4 KiB
Python
import pytest
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from reactor_sim import constants
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from reactor_sim.state import CoolantLoopState
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from reactor_sim.thermal import ThermalSolver, saturation_temperature
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def _secondary_loop(temp_in: float = 350.0, pressure: float = 0.5, flow: float = 200.0) -> CoolantLoopState:
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nominal_mass = constants.SECONDARY_LOOP_VOLUME_M3 * constants.COOLANT_DENSITY
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return CoolantLoopState(
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temperature_in=temp_in,
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temperature_out=temp_in,
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pressure=pressure,
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mass_flow_rate=flow,
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steam_quality=0.0,
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inventory_kg=nominal_mass,
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level=constants.SECONDARY_INVENTORY_TARGET,
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)
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def test_secondary_heats_to_saturation_before_boiling():
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solver = ThermalSolver()
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loop = _secondary_loop(temp_in=330.0, flow=180.0, pressure=0.5)
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sat_temp = saturation_temperature(loop.pressure)
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solver.step_secondary(loop, transferred_mw=50.0, dt=1.0)
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assert loop.steam_quality == pytest.approx(0.0)
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assert loop.temperature_out < sat_temp
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def test_secondary_generates_steam_when_energy_exceeds_sensible_heat():
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solver = ThermalSolver()
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loop = _secondary_loop(temp_in=330.0, flow=180.0, pressure=0.5)
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sat_temp = saturation_temperature(loop.pressure)
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solver.step_secondary(loop, transferred_mw=120.0, dt=1.0)
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assert loop.temperature_out == pytest.approx(sat_temp, rel=0.02)
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assert loop.steam_quality > 0.0
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assert loop.steam_quality < 1.0
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