If you try to use the teleporter and the teleport was rejected for any reason (like having a nuclear disk), you won't get the chance to get a random damage from the teleport.

Fixes issue #2236.
Removed some spawn() calls.
Removed the chance of fail from the portal effects (the blue portals made with hand teleporters).
The portal datums will now return 0 if the teleport failed, and now use a new proc, start(), instead of New() to handle themselves.
Standarized teleport.dm from the helper_datums folder.
Removed the checks for centcomm z level and away missions z level for teleports. Now you can go there.
changed the /red messages from the teleports datum to span classes.
The "[something] bounces off of the portal!" were replaced for "The portal rejects [something]".
Removed an extra "the" on those messages.

code/modules/events/wormholes.dm

@@ -51,7 +51,6 @@
 	desc = "It looks highly unstable; It could close at any moment."
 	icon = 'icons/obj/objects.dmi'
 	icon_state = "anom"
-	failchance = 0
 
 /obj/effect/portal/wormhole/attack_hand(mob/user)
 	teleport(user)

code/modules/mining/equipment_locker.dm

@@ -347,20 +347,20 @@
 	if(istype(M, /obj/effect))
 		return
 	if(istype(M, /atom/movable))
-		do_teleport(M, target, 6)
-		if(isliving(M))
-			var/mob/living/L = M
-			L.Weaken(3)
-			if(ishuman(L))
-				shake_camera(L, 20, 1)
-				spawn(20)
-					if(L)
-						L.visible_message("<span class='danger'>[L.name] vomits from travelling through the [src.name]!</span>")
-						L.nutrition -= 20
-						L.adjustToxLoss(-3)
-						var/turf/T = get_turf(L)
-						T.add_vomit_floor(L)
-						playsound(L, 'sound/effects/splat.ogg', 50, 1)
+		if(do_teleport(M, target, 6))
+			if(isliving(M))
+				var/mob/living/L = M
+				L.Weaken(3)
+				if(ishuman(L))
+					shake_camera(L, 20, 1)
+					spawn(20)
+						if(L)
+							L.visible_message("<span class='danger'>[L.name] vomits from travelling through the [src.name]!</span>")
+							L.nutrition -= 20
+							L.adjustToxLoss(-3)
+							var/turf/T = get_turf(L)
+							T.add_vomit_floor(L)
+							playsound(L, 'sound/effects/splat.ogg', 50, 1)
 
 /**********************Resonator**********************/