fix: reactor controller — vacuum/condenser pumps, drop ineffective sweep

- Start condenser vacuum pump at init; turn it off while the retention
  tank return valve is open (ejector has no suction during drain) and
  restart when the drain completes
- Start condenser circulation pump at 25% (was never running); prevents
  excessive cooling of return water per manual §Stabilization
- Drop primary pump hill-climb sweep: effect is negligible vs rod control
  and was masked by xenon transients; set fixed 65% for better heat transfer
- Raise auto temp-setpoint ceiling from 360 °C to 375 °C for more power headroom
- Raise condenser fill upper threshold from 50 % to 60 % (more reserve for secondary pumps)
- Add CONDENSER_VACUUM to state reads and TUI display (with colour alarm)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/reactor_control.py

@@ -5,14 +5,16 @@ Architecture:
     - Rod PID: keeps CORE_TEMP at setpoint via ROD_BANK_POS_0_ORDERED
 
   Per-train control (trains 1/2/3, 0-indexed as 0/1/2 in param names):
-    - Primary pump: fixed 50%; hill-climbs only when deficit > 5 MW
+    - Primary pump: fixed 65% (higher than 50% improves heat transfer per manual)
     - MSCV PI: drives train power output, gated on steam availability
     - Secondary pump feedforward: half of steam outlet + level PID
-    - Bypass: hold near 0
+    - Bypass: hold at 0
 
   Auxiliary:
+    - Vacuum pump: on continuously; turned off only during retention tank drain
+    - Condenser circulation pump: fixed 25% (prevents overcooling of return water)
     - Retention tank: drain via ejector return valve when > 75%, stop at 50%
-    - Condenser fill: run FREIGHT_PUMP_CONDENSER below 33%, stop at 50%
+    - Condenser fill: run FREIGHT_PUMP_CONDENSER below 45%, stop at 60%
 
 Usage:
     python3.14 scripts/reactor_control.py --trains 3 --target 50000
@@ -126,16 +128,11 @@ class TrainController:
                            out_min=-2.0, out_max=2.0, integral_max=3.0)
         self.sec_level_target = 25_000.0
 
-        self.prim_pump = 50.0
+        self.prim_pump = 65.0
         self.mscv      = 9.0
         self.sec_pump  = 40.0
 
-        self._pump_hill_cycle = 0
+        set_param(f'COOLANT_CORE_CIRCULATION_PUMP_{self.i}_ORDERED_SPEED', self.prim_pump)
-        self._pump_hill_dir   = +1.0
-        self._pump_hill_steam = None
-        self.PUMP_SWEEP_THRESHOLD = 5_000.0
-        self.sweeping = False
-
         set_param(f'STEAM_TURBINE_{self.i}_BYPASS_ORDERED', 0.0)
 
         self._params = [
@@ -175,24 +172,6 @@ class TrainController:
         self.mscv = float(np.clip(new_mscv, 0.5, 100.0))
         set_param(f'MSCV_{self.i}_OPENING_ORDERED', self.mscv)
 
-        self.sweeping = power_error > self.PUMP_SWEEP_THRESHOLD
-        if self.sweeping:
-            self._pump_hill_cycle += 1
-            if self._pump_hill_cycle >= 12:
-                self._pump_hill_cycle = 0
-                if self._pump_hill_steam is not None:
-                    if steam_out < self._pump_hill_steam - 0.2:
-                        self._pump_hill_dir = -self._pump_hill_dir
-                self._pump_hill_steam = steam_out
-                self.prim_pump = float(np.clip(self.prim_pump + self._pump_hill_dir, 15.0, 90.0))
-                set_param(f'COOLANT_CORE_CIRCULATION_PUMP_{self.i}_ORDERED_SPEED', self.prim_pump)
-        else:
-            if self.prim_pump != 50.0:
-                self.prim_pump = 50.0
-                set_param(f'COOLANT_CORE_CIRCULATION_PUMP_{self.i}_ORDERED_SPEED', self.prim_pump)
-            self._pump_hill_cycle = 0
-            self._pump_hill_steam = None
-
         sec_ff      = steam_out / 2.0
         level       = s[f'COOLANT_SEC_{self.i}_LIQUID_VOLUME']
         level_error = self.sec_level_target - level
@@ -228,6 +207,7 @@ core_params = [
     'CORE_STATE_CRITICALITY',
     'VACUUM_RETENTION_TANK_VOLUME',
     'CONDENSER_VOLUME', 'CONDENSER_VAPOR_VOLUME',
+    'CONDENSER_VACUUM',                            # vacuum level % — monitor for pump health
     'POWER_DEMAND_MW',
     'CORE_PRIMARY_CIRCUIT_COOLING_TANK_VOLUME',   # pressurizer water volume
     'COOLANT_CORE_PRIMARY_LOOP_LEVEL',             # overall primary loop fill %
@@ -257,6 +237,8 @@ _init = read_state([
     'STEAM_EJECTOR_CONDENSER_RETURN_VALVE_ACTUAL',
     'CONDENSER_VOLUME', 'CONDENSER_VAPOR_VOLUME',
     'FREIGHT_PUMP_CONDENSER_ACTIVE',
+    'CONDENSER_VACUUM_PUMP_ACTIVE',
+    'CONDENSER_CIRCULATION_PUMP_ACTIVE',
 ])
 _ret_vol_init   = _init.get('VACUUM_RETENTION_TANK_VOLUME', 0.0)
 _ret_valve_init = _init.get('STEAM_EJECTOR_CONDENSER_RETURN_VALVE_ACTUAL', 0.0)
@@ -272,7 +254,7 @@ _cond_vap_init  = _init.get('CONDENSER_VAPOR_VOLUME', 0.0)
 _cond_tot_init  = _cond_vol_init + _cond_vap_init
 _cond_pct_init  = (_cond_vol_init / _cond_tot_init * 100.0) if _cond_tot_init > 0 else 0.0
 _cond_pump_init = bool(_init.get('FREIGHT_PUMP_CONDENSER_ACTIVE', False))
-if _cond_pump_init and _cond_pct_init >= 50.0:
+if _cond_pump_init and _cond_pct_init >= 60.0:
     nucon.set(nucon._parameters['FREIGHT_PUMP_CONDENSER_SWITCH'], False)
     cond_pump_on = False
 elif not _cond_pump_init and _cond_pct_init < 45.0:
@@ -281,6 +263,20 @@ elif not _cond_pump_init and _cond_pct_init < 45.0:
 else:
     cond_pump_on = _cond_pump_init
 
+# Vacuum pump — keep on continuously; turn off only during retention tank drain.
+# (Opening the return valve breaks the suction path so the pump has no effect.)
+vac_pump_on = bool(_init.get('CONDENSER_VACUUM_PUMP_ACTIVE', False))
+if not vac_pump_on:
+    nucon.set(nucon._parameters['CONDENSER_VACUUM_PUMP_START_STOP'], True)
+    vac_pump_on = True
+
+# Condenser circulation pump — run at moderate speed to prevent overcooling
+# (manual §Stabilization: "prevent excessive cooling of the coolant returning to the evaporator").
+_cond_circ_on = bool(_init.get('CONDENSER_CIRCULATION_PUMP_ACTIVE', False))
+if not _cond_circ_on:
+    nucon.set(nucon._parameters['CONDENSER_CIRCULATION_PUMP_SWITCH'], True)
+    set_param('CONDENSER_CIRCULATION_PUMP_ORDERED_SPEED', 25.0)
+
 # Pressurizer spray valve — init from live state
 _prsr_live  = read_state(['CORE_PRIMARY_CIRCUIT_COOLING_TANK_VOLUME', 'COOLANT_CORE_PRIMARY_LOOP_LEVEL', 'FREIGHT_PUMP_FEEDWATER_ACTIVE'])
 _prsr_level = _prsr_live.get('CORE_PRIMARY_CIRCUIT_COOLING_TANK_VOLUME', PRSR_VOL_MAX * 0.6) / PRSR_VOL_MAX * 100.0
@@ -327,6 +323,7 @@ def run_controller(stdscr):
     global rod_pos, rod_cycle, rod_integral
     global ret_valve, ret_draining, ret_prev_vol, cond_pump_on
     global prsr_spraying, feedwater_on
+    global vac_pump_on
     global train_controllers, targets
 
     curses.curs_set(0)
@@ -360,6 +357,7 @@ def run_controller(stdscr):
     disp = dict(s={}, dynamic_setpoint=temp_setpoint, temp_auto=temp_auto, criticality=0.0,
                 ret_pct=0.0, ret_draining=False, ret_valve=0.0,
                 cond_pct=0.0, cond_pump_on=False,
+                vac_pump_on=vac_pump_on,
                 prsr_level=_prsr_level, prsr_spraying=prsr_spraying,
                 prim_level=_prsr_live.get('COOLANT_CORE_PRIMARY_LOOP_LEVEL', 100.0),
                 feedwater_on=feedwater_on,
@@ -392,7 +390,7 @@ def run_controller(stdscr):
         # Right/+ increase  Left/- decrease
         elif key in (ord('+'), ord('='), curses.KEY_RIGHT):
             if selected_train == 0 and not temp_auto:
-                temp_setpoint = min(round(temp_setpoint / 5.0) * 5.0 + 5.0, 410.0)
+                temp_setpoint = min(round(temp_setpoint / 5.0) * 5.0 + 5.0, 375.0)
             elif selected_train == 4:
                 args.grid_buffer = min(args.grid_buffer + 1.0, 100.0)
             elif selected_train in train_controllers:
@@ -471,7 +469,7 @@ def run_controller(stdscr):
         _safe_addstr(stdscr, row, 10, f'[{auto_str}]', auto_color | BOLD)
         _safe_addstr(stdscr, row, 16, 'Temp: ', BOLD)
         _safe_addstr(stdscr, row, 22, f'{core_temp:6.1f}°C', temp_color | BOLD)
-        sp_color = RED if dynamic_setpoint < 306 or dynamic_setpoint > 360 else 0
+        sp_color = RED if dynamic_setpoint < 306 or dynamic_setpoint > 375 else 0
         _safe_addstr(stdscr, row, 32, f'sp=', 0)
         _safe_addstr(stdscr, row, 35, f'{dynamic_setpoint:.0f}°C', sp_color | BOLD)
         _safe_addstr(stdscr, row, 40,
@@ -501,10 +499,9 @@ def run_controller(stdscr):
                 _safe_addstr(stdscr, row, 32,
                     f'[{_bar(pwr_pct, 14)}] {power_error/1000:+5.1f}MW  {tgt_str}')
                 row += 1
-                sweep_ind = '~' if tc.sweeping else ' '
                 _safe_addstr(stdscr, row, 16,
                     f'Steam: {steam_out:5.1f}  MSCV: {tc.mscv:4.1f}  '
-                    f'Prim: {tc.prim_pump:3.0f}%{sweep_ind} Sec: {tc.sec_pump:3.0f}%  '
+                    f'Prim: {tc.prim_pump:3.0f}%  Sec: {tc.sec_pump:3.0f}%  '
                     f'Lvl: {level:.0f} (Δ{level_error:+.0f})')
             elif not is_active:
                 hint = ' (+/Up to add)' if is_sel else ''
@@ -540,12 +537,18 @@ def run_controller(stdscr):
             f'  DRAINING  valve={ret_valve:.0f}%' if ret_draining else '  OK',
             YELLOW if ret_draining else GREEN)
         row += 1
+        cond_vac_  = s.get('CONDENSER_VACUUM', 0.0)
         cond_color = RED if cond_pct < 25 else YELLOW if cond_pct < 40 else GREEN
+        vac_on_    = disp.get('vac_pump_on', True)
+        vac_color  = (RED if cond_vac_ < 50 else YELLOW if cond_vac_ < 80 else GREEN) if vac_on_ else YELLOW
         _safe_addstr(stdscr, row, 2, '◆ CONDENSER FILL  ', BOLD)
         _safe_addstr(stdscr, row, 20, f'[{_bar(cond_pct, 20)}]', cond_color)
         _safe_addstr(stdscr, row, 43, f' {cond_pct:4.0f}%')
         _safe_addstr(stdscr, row, 49, '  PUMP ON' if cond_pump_on else '  OK',
                      YELLOW if cond_pump_on else GREEN)
+        _safe_addstr(stdscr, row, 60,
+                     f'  VAC:{"OFF" if not vac_on_ else f"{cond_vac_:.0f}%"}',
+                     vac_color)
         row += 1
         prsr_level_  = disp['prsr_level']
         prsr_spray_  = disp['prsr_spraying']
@@ -636,7 +639,7 @@ def run_controller(stdscr):
         if temp_auto and train_data:
             total_error = sum(train_data[t][1] for t in train_data)  # sum of power_errors
             sp_delta = float(np.clip(total_error * 0.00002, -0.5, 0.5))
-            temp_setpoint = float(np.clip(temp_setpoint + sp_delta, 306.0, 360.0))
+            temp_setpoint = float(np.clip(temp_setpoint + sp_delta, 306.0, 375.0))
 
         # ---- Aux: retention tank ----
         ret_vol = s.get('VACUUM_RETENTION_TANK_VOLUME', 0.0)
@@ -645,7 +648,17 @@ def run_controller(stdscr):
             ret_draining = False
             ret_valve = 0.0
             set_param('STEAM_EJECTOR_CONDENSER_RETURN_VALVE', 0.0)
+            # Drain complete — restart vacuum pump
+            if not vac_pump_on:
+                nucon.set(nucon._parameters['CONDENSER_VACUUM_PUMP_START_STOP'], True)
+                vac_pump_on = True
         elif ret_vol > RETENTION_HI:
+            if not ret_draining:
+                # Starting drain — stop vacuum pump.
+                # The ejector return valve bypasses the suction path so the pump has no effect
+                # and wastes power; turn it off for the duration of the drain.
+                nucon.set(nucon._parameters['CONDENSER_VACUUM_PUMP_START_STOP'], False)
+                vac_pump_on = False
             ret_draining = True
             if ret_prev_vol is not None and ret_vol >= ret_prev_vol - 50.0:
                 ret_valve = min(ret_valve + 1.0, 50.0)
@@ -662,7 +675,7 @@ def run_controller(stdscr):
         if not cond_pump_on and cond_pct < 45.0:
             cond_pump_on = True
             nucon.set(nucon._parameters['FREIGHT_PUMP_CONDENSER_SWITCH'], True)
-        elif cond_pump_on and cond_pct >= 50.0:
+        elif cond_pump_on and cond_pct >= 60.0:
             cond_pump_on = False
             nucon.set(nucon._parameters['FREIGHT_PUMP_CONDENSER_SWITCH'], False)
 
@@ -694,6 +707,7 @@ def run_controller(stdscr):
                     criticality=criticality,
                     ret_pct=ret_pct, ret_draining=ret_draining, ret_valve=ret_valve,
                     cond_pct=cond_pct, cond_pump_on=cond_pump_on,
+                    vac_pump_on=vac_pump_on,
                     prsr_level=prsr_level, prsr_spraying=prsr_spraying,
                     prim_level=prim_level, feedwater_on=feedwater_on,
                     grid_follow=grid_follow, grid_demand_kw=grid_demand_kw)