169 lines
6.8 KiB
Python
169 lines
6.8 KiB
Python
"""Control system for rods and plant automation."""
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from __future__ import annotations
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from dataclasses import dataclass, field
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import json
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import logging
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from pathlib import Path
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from . import constants
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from .state import CoolantLoopState, CoreState, PlantState
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LOGGER = logging.getLogger(__name__)
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def clamp(value: float, lo: float, hi: float) -> float:
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return max(lo, min(hi, value))
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@dataclass
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class ControlSystem:
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setpoint_mw: float = 3_000.0
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rod_fraction: float = 0.5
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manual_control: bool = False
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rod_banks: list[float] = field(default_factory=lambda: [0.5, 0.5, 0.5])
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rod_target: float = 0.5
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def update_rods(self, state: CoreState, dt: float) -> float:
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if not self.rod_banks or len(self.rod_banks) != len(constants.CONTROL_ROD_BANK_WEIGHTS):
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self.rod_banks = [self.rod_fraction] * len(constants.CONTROL_ROD_BANK_WEIGHTS)
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# Keep manual tweaks in sync with the target.
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self.rod_target = clamp(self.rod_target, 0.0, 0.95)
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if self.manual_control:
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if abs(self.rod_fraction - self.effective_insertion()) > 1e-6:
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self.rod_target = clamp(self.rod_fraction, 0.0, 0.95)
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self._advance_banks(self.rod_target, dt)
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return self.rod_fraction
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error = (state.power_output_mw - self.setpoint_mw) / self.setpoint_mw
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# When power is low (negative error) withdraw rods; when high, insert them.
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adjustment = error * 0.2
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adjustment = clamp(adjustment, -constants.CONTROL_ROD_SPEED * dt, constants.CONTROL_ROD_SPEED * dt)
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self.rod_target = clamp(self.rod_target + adjustment, 0.0, 0.95)
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self._advance_banks(self.rod_target, dt)
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LOGGER.debug("Control rod target=%.3f (error=%.3f)", self.rod_target, error)
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return self.rod_fraction
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def set_rods(self, fraction: float) -> float:
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self.rod_target = clamp(fraction, 0.0, 0.95)
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self._advance_banks(self.rod_target, 0.0)
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LOGGER.info("Manual rod target set to %.3f", self.rod_target)
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return self.rod_target
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def increment_rods(self, delta: float) -> float:
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return self.set_rods(self.rod_fraction + delta)
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def scram(self) -> float:
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self.rod_target = 0.95
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self.rod_banks = [0.95 for _ in self.rod_banks]
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self._sync_fraction()
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LOGGER.warning("SCRAM: rods fully inserted")
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return self.rod_fraction
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def set_power_setpoint(self, megawatts: float) -> None:
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previous = self.setpoint_mw
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self.setpoint_mw = clamp(megawatts, 100.0, 4_000.0)
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LOGGER.info("Power setpoint %.0f -> %.0f MW", previous, self.setpoint_mw)
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def set_manual_mode(self, manual: bool) -> None:
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if self.manual_control != manual:
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self.manual_control = manual
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LOGGER.info("Rod control %s", "manual" if manual else "automatic")
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def coolant_demand(
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self,
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primary: CoolantLoopState,
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core_power_mw: float | None = None,
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electrical_output_mw: float | None = None,
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) -> float:
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desired_temp = constants.PRIMARY_OUTLET_TARGET_K
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# Increase demand when outlet is hotter than desired, reduce when cooler.
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temp_error = (primary.temperature_out - desired_temp) / 100.0
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demand = 0.8 + temp_error
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# Keep a light power-proportional floor so both pumps stay spinning without flooding the loop.
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power_floor = 0.0
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if core_power_mw is not None:
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power_fraction = clamp(core_power_mw / constants.NORMAL_CORE_POWER_MW, 0.0, 1.5)
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power_floor = 0.15 + 0.2 * power_fraction
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# Allow warmer operation when electrical load is already being served (turbines online),
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# but keep a higher floor when idling so test scenarios still converge near 3 GW.
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if electrical_output_mw is not None and electrical_output_mw > 10.0:
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power_floor *= 0.6
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demand = max(demand, power_floor)
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demand = clamp(demand, 0.0, 1.0)
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LOGGER.debug(
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"Coolant demand %.2f (temp_error=%.2f, power_floor=%.2f) for outlet %.1fK power %.1f MW elec %.1f MW",
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demand,
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temp_error,
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power_floor,
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primary.temperature_out,
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core_power_mw or 0.0,
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electrical_output_mw or 0.0,
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)
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return demand
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def effective_insertion(self) -> float:
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if not self.rod_banks:
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return self.rod_fraction
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weights = constants.CONTROL_ROD_BANK_WEIGHTS
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total = sum(weights)
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effective = sum(w * b for w, b in zip(weights, self.rod_banks)) / total
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return clamp(effective, 0.0, 0.95)
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def _advance_banks(self, target: float, dt: float) -> None:
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speed = constants.CONTROL_ROD_SPEED * dt
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new_banks: list[float] = []
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for idx, pos in enumerate(self.rod_banks):
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direction = 1 if target > pos else -1
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step = direction * speed
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updated = clamp(pos + step, 0.0, 0.95)
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# Avoid overshoot
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if (direction > 0 and updated > target) or (direction < 0 and updated < target):
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updated = target
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new_banks.append(updated)
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self.rod_banks = new_banks
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self._sync_fraction()
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def _sync_fraction(self) -> None:
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self.rod_fraction = self.effective_insertion()
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def save_state(
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self,
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filepath: str,
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plant_state: PlantState,
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metadata: dict | None = None,
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health_snapshot: dict | None = None,
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) -> None:
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payload = {
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"control": {
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"setpoint_mw": self.setpoint_mw,
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"rod_fraction": self.rod_fraction,
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"manual_control": self.manual_control,
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"rod_banks": self.rod_banks,
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"rod_target": self.rod_target,
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},
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"plant": plant_state.to_dict(),
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"metadata": metadata or {},
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}
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if health_snapshot:
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payload["health"] = health_snapshot
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path = Path(filepath)
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path.parent.mkdir(parents=True, exist_ok=True)
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path.write_text(json.dumps(payload, indent=2))
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LOGGER.info("Saved control & plant state to %s", path)
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def load_state(self, filepath: str) -> tuple[PlantState, dict, dict | None]:
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path = Path(filepath)
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data = json.loads(path.read_text())
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control = data.get("control", {})
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self.setpoint_mw = control.get("setpoint_mw", self.setpoint_mw)
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self.rod_fraction = control.get("rod_fraction", self.rod_fraction)
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self.manual_control = control.get("manual_control", self.manual_control)
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self.rod_banks = control.get("rod_banks", self.rod_banks) or self.rod_banks
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self.rod_target = control.get("rod_target", self.rod_fraction)
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self._sync_fraction()
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plant = PlantState.from_dict(data["plant"])
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LOGGER.info("Loaded plant state from %s", path)
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return plant, data.get("metadata", {}), data.get("health")
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