2013-10-06 18:26:18 [SEVERE] [Minecraft-Server] Encountered an unexpected exception ReportedException
net.minecraft.util.ReportedException: Ticking tile entity
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:674)
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:276)
        at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
        at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)
Caused by: java.lang.NullPointerException
        at net.minecraftforge.fluids.FluidStack.<init>(FluidStack.java:27)
        at ic2.bcIntegration.core.TileEntityNuclearReactorSteam.outputSteam(TileEntityNuclearReactorSteam.java:32)
        at ic2.bcIntegration.core.TileEntityNuclearReactorSteam.sendEnergy(TileEntityNuclearReactorSteam.java:22)
        at ic2.core.block.generator.tileentity.TileEntityNuclearReactor.sendEnergyToChambers(TileEntityNuclearReactor.java:455)
        at ic2.core.block.generator.tileentity.TileEntityNuclearReactor.func_70316_g(TileEntityNuclearReactor.java:142)
        at net.minecraft.world.World.func_72939_s(World.java:2209)
        at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:552)
        at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668)
        ... 4 more