diff --git a/src/reactor_sim/reactor.py b/src/reactor_sim/reactor.py
index 393793b..e9f7165 100644
--- a/src/reactor_sim/reactor.py
+++ b/src/reactor_sim/reactor.py
@@ -269,20 +269,12 @@ class Reactor:
                 state.primary_loop.pressure, 0.5, dt, self.primary_pump.spool_time
             )
         else:
-            state.primary_loop.mass_flow_rate = self._ramp_value(
-                state.primary_loop.mass_flow_rate, 0.0, dt, self.primary_pump.spool_time
-            )
-            state.primary_loop.pressure = self._ramp_value(
-                state.primary_loop.pressure, 0.5, dt, self.primary_pump.spool_time
-            )
+            state.primary_loop.mass_flow_rate = 0.0
+            state.primary_loop.pressure = 0.5
             for pump_state in state.primary_pumps:
                 pump_state.active = False
-                pump_state.flow_rate = self._ramp_value(
-                    pump_state.flow_rate, 0.0, dt, self.primary_pump.spool_time
-                )
-                pump_state.pressure = self._ramp_value(
-                    pump_state.pressure, state.primary_loop.pressure, dt, self.primary_pump.spool_time
-                )
+                pump_state.flow_rate = 0.0
+                pump_state.pressure = state.primary_loop.pressure
                 pump_state.status = "STOPPING" if pump_state.flow_rate > 1.0 else "OFF"
         if self.secondary_pump_active:
             total_flow = 0.0
@@ -321,20 +313,12 @@ class Reactor:
                 state.secondary_loop.pressure, 0.5, dt, self.secondary_pump.spool_time
             )
         else:
-            state.secondary_loop.mass_flow_rate = self._ramp_value(
-                state.secondary_loop.mass_flow_rate, 0.0, dt, self.secondary_pump.spool_time
-            )
-            state.secondary_loop.pressure = self._ramp_value(
-                state.secondary_loop.pressure, 0.5, dt, self.secondary_pump.spool_time
-            )
+            state.secondary_loop.mass_flow_rate = 0.0
+            state.secondary_loop.pressure = 0.5
             for pump_state in state.secondary_pumps:
                 pump_state.active = False
-                pump_state.flow_rate = self._ramp_value(
-                    pump_state.flow_rate, 0.0, dt, self.secondary_pump.spool_time
-                )
-                pump_state.pressure = self._ramp_value(
-                    pump_state.pressure, state.secondary_loop.pressure, dt, self.secondary_pump.spool_time
-                )
+                pump_state.flow_rate = 0.0
+                pump_state.pressure = state.secondary_loop.pressure
                 pump_state.status = "STOPPING" if pump_state.flow_rate > 1.0 else "OFF"
 
         self.thermal.step_core(state.core, state.primary_loop, total_power, dt)