82 lines
2.8 KiB
Python
82 lines
2.8 KiB
Python
import json
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from pathlib import Path
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import pytest
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from reactor_sim import constants
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from reactor_sim.failures import HealthMonitor
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from reactor_sim.reactor import Reactor
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from reactor_sim.simulation import ReactorSimulation
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def test_reactor_initial_state_is_cold():
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reactor = Reactor.default()
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state = reactor.initial_state()
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assert state.core.fuel_temperature == constants.ENVIRONMENT_TEMPERATURE
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assert state.primary_loop.mass_flow_rate == 0.0
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assert state.total_electrical_output() == 0.0
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def test_state_save_and_load_roundtrip(tmp_path: Path):
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reactor = Reactor.default()
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sim = ReactorSimulation(reactor, timestep=5.0, duration=15.0)
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sim.log()
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save_path = tmp_path / "plant_state.json"
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assert sim.last_state is not None
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reactor.save_state(str(save_path), sim.last_state)
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assert save_path.exists()
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restored_reactor = Reactor.default()
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restored_state = restored_reactor.load_state(str(save_path))
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assert restored_state.core.fuel_temperature == pytest.approx(
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sim.last_state.core.fuel_temperature
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)
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assert restored_reactor.control.rod_fraction == reactor.control.rod_fraction
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def test_health_monitor_flags_core_failure():
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reactor = Reactor.default()
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state = reactor.initial_state()
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state.core.fuel_temperature = constants.MAX_CORE_TEMPERATURE
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failures = reactor.health_monitor.evaluate(state, True, True, [True, True, True], dt=200.0)
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assert "core" in failures
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reactor._handle_failure("core")
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assert reactor.shutdown is True
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def test_maintenance_recovers_component_health():
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monitor = HealthMonitor()
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pump = monitor.component("secondary_pump")
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pump.integrity = 0.3
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pump.fail()
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restored = monitor.maintain("secondary_pump", amount=0.5)
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assert restored is True
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assert pump.integrity == pytest.approx(0.8)
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assert pump.failed is False
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def test_secondary_pump_loss_triggers_scram_and_no_steam():
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reactor = Reactor.default()
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state = reactor.initial_state()
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# Make sure some power is present to trigger heat-sink logic.
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state.core.power_output_mw = 500.0
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reactor.secondary_pump_active = False
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reactor.control.manual_control = True
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reactor.control.rod_fraction = 0.1
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reactor.step(state, dt=1.0)
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assert reactor.shutdown is True
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assert all(t.electrical_output_mw == 0.0 for t in state.turbines)
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def test_cold_shutdown_stays_subcritical():
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reactor = Reactor.default()
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state = reactor.initial_state()
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reactor.control.manual_control = True
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reactor.control.rod_fraction = 0.95
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reactor.primary_pump_active = False
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reactor.secondary_pump_active = False
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initial_power = state.core.power_output_mw
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for _ in range(10):
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reactor.step(state, dt=1.0)
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assert state.core.power_output_mw <= initial_power + 0.5
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assert reactor.shutdown is True
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