Fix things, adjust the algorithm slightly to model the differential equation better.

src/main/java/mekanism/generators/common/FusionReactor.java

@@ -34,21 +34,26 @@ public class FusionReactor implements IFusionReactor
 	public Set<IReactorBlock> reactorBlocks = new HashSet<IReactorBlock>();
 	public Set<INeutronCapture> neutronCaptors = new HashSet<INeutronCapture>();
 
-	//Current stores of energy
+	//Current stores of temperature
 	public double plasmaTemperature;
 	public double caseTemperature;
 
+	//Last values of temperature
+	public double lastPlasmaTemperature;
+	public double lastCaseTemperature;
+
 	//Reaction characteristics
 	public static double burnTemperature = 1E8;
 	public static double burnRatio = 1;
-	public static double tempPerFuel = 5E6;
+	public static double energyPerFuel = 5E6;
 	public int injectionRate = 0;
 
 	//Thermal characteristics
-	public static double plasmaHeatCapacity = 1;
+	public static double plasmaHeatCapacity = 100;
 	public static double caseHeatCapacity = 1;
 	public static double enthalpyOfVaporization = 10;
-	public static double thermocoupleEfficiency = 0.01;
+	public static double thermocoupleEfficiency = 0.001;
+	public static double steamTransferEfficiency = 0.01;
 
 	//Heat transfer metrics
 	public static double plasmaCaseConductivity = 0.2;
@@ -99,6 +104,9 @@ public class FusionReactor implements IFusionReactor
 		//Perform the heat transfer calculations
 		transferHeat();
 
+		lastPlasmaTemperature = plasmaTemperature;
+		lastCaseTemperature = caseTemperature;
+
 		if(plasmaTemperature > 1E-6 || caseTemperature > 1E-6)
 		{
 			Mekanism.logger.info("Reactor temperatures: Plasma: " + (int) plasmaTemperature + ",			Casing: " + (int) caseTemperature);
@@ -125,9 +133,9 @@ public class FusionReactor implements IFusionReactor
 
 	public int burnFuel()
 	{
-		int fuelBurned = (int)min(getFuelTank().getStored(), max(0, plasmaTemperature - burnTemperature)*burnRatio);
+		int fuelBurned = (int)min(getFuelTank().getStored(), max(0, lastPlasmaTemperature - burnTemperature)*burnRatio);
 		getFuelTank().draw(fuelBurned, true);
-		plasmaTemperature += tempPerFuel * fuelBurned;
+		plasmaTemperature += energyPerFuel * fuelBurned / plasmaHeatCapacity;
 		return fuelBurned;
 	}
 
@@ -149,29 +157,29 @@ public class FusionReactor implements IFusionReactor
 	public void transferHeat()
 	{
 		//Transfer from plasma to casing
-		double plasmaCaseHeat = plasmaCaseConductivity * (plasmaTemperature - caseTemperature);
+		double plasmaCaseHeat = plasmaCaseConductivity * (lastPlasmaTemperature - lastCaseTemperature);
 		plasmaTemperature -= plasmaCaseHeat / plasmaHeatCapacity;
 		caseTemperature += plasmaCaseHeat / caseHeatCapacity;
 
 		//Transfer from casing to water if necessary
 		if(activelyCooled)
 		{
-			double caseWaterHeat = caseWaterConductivity * caseTemperature;
+			double caseWaterHeat = caseWaterConductivity * lastCaseTemperature;
-			int waterToVaporize = (int)(caseWaterHeat / enthalpyOfVaporization);
+			int waterToVaporize = (int)(steamTransferEfficiency * caseWaterHeat / enthalpyOfVaporization);
-			Mekanism.logger.info("Wanting to vaporise " + waterToVaporize + "mB of water");
+			//Mekanism.logger.info("Wanting to vaporise " + waterToVaporize + "mB of water");
 			waterToVaporize = min(waterToVaporize, min(getWaterTank().getFluidAmount(), getSteamTank().getCapacity() - getSteamTank().getFluidAmount()));
 			if(waterToVaporize > 0)
 			{
-				Mekanism.logger.info("Vaporising " + waterToVaporize + "mB of water");
+				//Mekanism.logger.info("Vaporising " + waterToVaporize + "mB of water");
 				getWaterTank().drain(waterToVaporize, true);
 				getSteamTank().fill(new FluidStack(FluidRegistry.getFluid("steam"), waterToVaporize), true);
 			}
-			caseWaterHeat = waterToVaporize * enthalpyOfVaporization;
+			caseWaterHeat = waterToVaporize * enthalpyOfVaporization / steamTransferEfficiency;
 			caseTemperature -= caseWaterHeat / caseHeatCapacity;
 		}
 
 		//Transfer from casing to environment
-		double caseAirHeat = caseAirConductivity * caseTemperature;
+		double caseAirHeat = caseAirConductivity * lastCaseTemperature;
 		caseTemperature -= caseAirHeat / caseHeatCapacity;
 		setBufferedEnergy(getBufferedEnergy() + caseAirHeat * thermocoupleEfficiency);
 	}

src/main/java/mekanism/generators/common/tile/reactor/TileEntityReactorBlock.java

@@ -57,6 +57,7 @@ public abstract class TileEntityReactorBlock extends TileEntityElectricBlock imp
 		if(changed)
 		{
 			worldObj.notifyBlocksOfNeighborChange(xCoord, yCoord, zCoord, getBlockType());
+			changed = false;
 		}
 	}
 

src/main/java/mekanism/generators/common/tile/reactor/TileEntityReactorController.java

@@ -4,6 +4,7 @@ import mekanism.api.gas.GasTank;
 import mekanism.common.Mekanism;
 import mekanism.generators.common.FusionReactor;
 
+import net.minecraft.item.ItemStack;
 import net.minecraftforge.fluids.FluidContainerRegistry;
 import net.minecraftforge.fluids.FluidTank;
 
@@ -24,6 +25,7 @@ public class TileEntityReactorController extends TileEntityReactorBlock
 	public TileEntityReactorController()
 	{
 		super("ReactorController", 1000000000);
+		inventory = new ItemStack[1];
 	}
 
 	@Override

src/main/java/mekanism/generators/common/tile/reactor/TileEntityReactorPort.java

@@ -11,6 +11,7 @@ import mekanism.api.gas.IGasHandler;
 import mekanism.api.gas.ITubeConnection;
 import mekanism.common.util.CableUtils;
 
+import net.minecraft.item.ItemStack;
 import net.minecraftforge.common.util.ForgeDirection;
 import net.minecraftforge.fluids.Fluid;
 import net.minecraftforge.fluids.FluidRegistry;
@@ -23,7 +24,9 @@ public class TileEntityReactorPort extends TileEntityReactorBlock implements IFl
 	public TileEntityReactorPort()
 	{
 		super("name", 1);
+		inventory = new ItemStack[0];
 	}
+
 	@Override
 	public boolean isFrame()
 	{