made reactor not explode in rain

Author: Trinsdar

src/main/java/org/gtreimagined/gt4r/blockentity/multi/BlockEntityReactorCore.java

@@ -700,6 +700,12 @@ public MachineState getDefaultMachineState() {
 
     // #endregion
 
+
+    @Override
+    protected boolean allowExplosionsInRain() {
+       return false;
+    }
+
     static ResourceLocation MISSING_CHAMBER = new ResourceLocation(GT4RRef.ID, "textures/gui/reactor_missing_chamber.png");
 
     @Override