An experiment

core/src/mindustry/world/blocks/defense/turrets/BaseTurret.java

@@ -31,6 +31,7 @@ public class BaseTurret extends Block{
         priority = TargetPriority.turret;
         group = BlockGroup.turrets;
         flags = EnumSet.of(BlockFlag.turret);
+        updateInUnits = false;
     }
 
     @Override

core/src/mindustry/world/blocks/distribution/PayloadConveyor.java

@@ -127,7 +127,7 @@ public class PayloadConveyor extends Block{
             if(!enabled) return;
 
             if(item != null){
-                item.update();
+                item.update(false);
             }
 
             lastInterp = curInterp;

core/src/mindustry/world/blocks/payloads/BuildPayload.java

@@ -37,7 +37,9 @@ public class BuildPayload implements Payload{
     }
 
     @Override
-    public void update(){
+    public void update(boolean inUnit){
+        if(inUnit && !build.block.updateInUnits) return;
+
         if(build.tile == null) build.tile = emptyTile;
         build.update();
     }

core/src/mindustry/world/blocks/payloads/Payload.java

@@ -36,8 +36,9 @@ public interface Payload extends Position{
     /** @return the time taken to build this payload. */
     float buildTime();
 
-    /** update this payload if it is a block */
-    default void update(){}
+    /** update this payload if it is a block
+     * @param inUnit whether this payload is in a unit */
+    default void update(boolean inUnit){}
 
     /** @return whether this payload was dumped. */
     default boolean dump(){

core/src/mindustry/world/blocks/payloads/PayloadBlock.java

@@ -138,7 +138,7 @@ public class PayloadBlock extends Block{
         @Override
         public void updateTile(){
             if(payload != null){
-                payload.update();
+                payload.update(false);
             }
         }
 

core/src/mindustry/world/blocks/power/NuclearReactor.java

@@ -49,6 +49,7 @@ public class NuclearReactor extends PowerGenerator{
 
     public NuclearReactor(String name){
         super(name);
+        updateInUnits = false;
         itemCapacity = 30;
         liquidCapacity = 30;
         hasItems = true;
@@ -138,7 +139,7 @@ public class NuclearReactor extends PowerGenerator{
             if((fuel < 5 && heat < 0.5f) || !state.rules.reactorExplosions) return;
 
             Effect.shake(6f, 16f, x, y);
-            Damage.damage(x, y, explosionRadius * tilesize, explosionDamage * 4);
+            Damage.damage(x, y, explosionRadius * tilesize * (float)(fuel / itemCapacity), explosionDamage * 4);
 
             explodeEffect.at(x, y);
         }

core/src/mindustry/world/blocks/power/PowerGraph.java

@@ -280,6 +280,13 @@ public class PowerGraph{
         }
     }
 
+    public void clear(){
+        all.clear();
+        producers.clear();
+        consumers.clear();
+        batteries.clear();
+    }
+
     public void reflow(Building tile){
         queue.clear();
         queue.addLast(tile);