diff --git a/code/game/objects/items/nuke_tools.dm b/code/game/objects/items/nuke_tools.dm
index 9b49f23cb73..b88d4f6a07c 100644
--- a/code/game/objects/items/nuke_tools.dm
+++ b/code/game/objects/items/nuke_tools.dm
@@ -11,7 +11,8 @@
 	var/cooldown = 0
 
 /obj/item/nuke_core/New()
-	SSobj.processing += src
+	..()
+	SSobj.processing |= src
 
 /obj/item/nuke_core/attackby(obj/item/nuke_core_container/container, mob/user)
 	if(istype(container))
@@ -41,13 +42,16 @@
 	core = ncore
 	icon_state = "core_container_loaded"
 	user << "<span class='warning'>Container is sealing...</span>"
-	spawn(50)
+	addtimer(src, "seal", 50)
+	return 1
+
+/obj/item/nuke_core_container/proc/seal()
+	if(istype(core))
 		SSobj.processing -= core
 		icon_state = "core_container_sealed"
-		playsound(loc, 'sound/items/Deconstruct.ogg', 100, 1)
-		if(loc == user)
-			user << "<span class='warning'>Container is sealed, the radiation is contained.</span>"
-	return 1
+		playsound(loc, 'sound/items/Deconstruct.ogg', 60, 1)
+		if(ismob(loc))
+			loc << "<span class='warning'>[src] is permanently sealed, [core]'s radiation is contained.</span>"
 
 /obj/item/nuke_core_container/attackby(obj/item/nuke_core/core, mob/user)
 	if(istype(core))