Ports the radiation subsystem and cleans up damage flags. (#15715)

code/modules/projectiles/guns/alien.dm

@@ -98,7 +98,7 @@
 	icon = 'icons/obj/machinery/particle_accelerator2.dmi'
 	icon_state = "particle"
 	damage = 60
-	damage_type = BRUTE
+	damage_type = DAMAGE_BRUTE
 	check_armor = "bullet"
 	pass_flags = PASSTABLE | PASSGLASS | PASSGRILLE
 

code/modules/projectiles/guns/energy/mining.dm

@@ -70,7 +70,7 @@
 	name = "plasma arc"
 	icon_state = "omnilaser"
 	damage = 20
-	damage_type = BURN
+	damage_type = DAMAGE_BURN
 	check_armor = "laser"
 	range = 5
 	pass_flags = PASSTABLE|PASSRAILING

code/modules/projectiles/guns/energy/nuclear.dm

@@ -71,7 +71,7 @@
 			to_chat(M, "<span class='warning'>Your gun feels pleasantly warm for a moment.</span>")
 		else
 			to_chat(M, "<span class='warning'>You feel a warm sensation.</span>")
-		M.apply_effect(rand(3,120), IRRADIATE)
+	SSradiation.radiate(src, rand(3, 50))
 	return
 
 /obj/item/gun/energy/gun/nuclear/medium_fail(var/mob/user)
@@ -85,7 +85,7 @@
 	to_chat(user, "<span class='danger'>Your gun's reactor overloads!</span>")
 	for (var/mob/living/M in range(rand(1,4),src))
 		to_chat(M, "<span class='warning'>You feel a wave of heat wash over you.</span>")
-		M.apply_effect(300, IRRADIATE)
+	SSradiation.radiate(src, rand(3, 80))
 	crit_fail = 1 //break the gun so it stops recharging
 	self_recharge = FALSE
 	update_icon()