From bdd13beeff5045a34042439e39620b9ca550b214 Mon Sep 17 00:00:00 2001
From: Vanessa Dannenberg <vanessa.e.dannenberg@gmail.com>
Date: Tue, 27 Nov 2018 21:24:52 +0100
Subject: [PATCH] fix brass block->ingot recipe (clearing basic_materials' copper/silver recipe killed this one also)
---
technic/items.lua | 61 +++++++++++++++++-------------
1 files changed, 35 insertions(+), 26 deletions(-)
diff --git a/technic/items.lua b/technic/items.lua
index b974b95..d89ed46 100644
--- a/technic/items.lua
+++ b/technic/items.lua
@@ -69,41 +69,16 @@
}
})
-
-minetest.register_craftitem("technic:fine_copper_wire", {
- description = S("Fine Copper Wire"),
- inventory_image = "technic_fine_copper_wire.png",
-})
-
-minetest.register_craftitem("technic:fine_gold_wire", {
- description = S("Fine Gold Wire"),
- inventory_image = "technic_fine_gold_wire.png",
-})
-
-minetest.register_craftitem("technic:fine_silver_wire", {
- description = S("Fine Silver Wire"),
- inventory_image = "technic_fine_silver_wire.png",
-})
-
minetest.register_craftitem("technic:copper_coil", {
description = S("Copper Coil"),
inventory_image = "technic_copper_coil.png",
})
-minetest.register_craftitem("technic:motor", {
- description = S("Electric Motor"),
- inventory_image = "technic_motor.png",
-})
-
minetest.register_craftitem("technic:lv_transformer", {
description = S("Low Voltage Transformer"),
inventory_image = "technic_lv_transformer.png",
})
-minetest.register_craftitem("technic:lv_transformer", {
- description = S("Low Voltage Transformer"),
- inventory_image = "technic_lv_transformer.png",
-})
minetest.register_craftitem("technic:mv_transformer", {
description = S("Medium Voltage Transformer"),
inventory_image = "technic_mv_transformer.png",
@@ -170,11 +145,44 @@
inventory_image = "technic_uranium_ingot.png",
groups = {uranium_ingot=1, not_in_creative_inventory=nici},
});
+ -- Note on radioactivity of blocks:
+ -- Source: <http://www.wise-uranium.org/rup.html>
+ -- The baseline radioactivity of an isotope is not especially
+ -- correlated with whether it's fissile (i.e., suitable as
+ -- reactor fuel). Natural uranium consists mainly of fissile
+ -- U-235 and non-fissile U-238, and both U-235 and U-238 are
+ -- significantly radioactive. U-235's massic activity is
+ -- about 80.0 MBq/kg, and U-238's is about 12.4 MBq/kg, which
+ -- superficially suggests that 3.5%-fissile uranium should have
+ -- only 1.19 times the activity of fully-depleted uranium.
+ -- But a third isotope affects the result hugely: U-234 has
+ -- massic activity of 231 GBq/kg. Natural uranium has massic
+ -- composition of 99.2837% U-238, 0.711% U-235, and 0.0053% U-234,
+ -- so its activity comes roughly 49% each from U-234 and U-238
+ -- and only 2% from U-235. During enrichment via centrifuge,
+ -- the U-234 fraction is concentrated along with the U-235, with
+ -- the U-234:U-235 ratio remaining close to its original value.
+ -- (Actually the U-234 gets separated from U-238 slightly more
+ -- than the U-235 is, so the U-234:U-235 ratio is slightly
+ -- higher in enriched uranium.) A typical massic composition
+ -- for 3.5%-fissile uranium is 96.47116% U-238, 3.5% U-235, and
+ -- 0.02884% U-234. This gives 3.5%-fissile uranium about 6.55
+ -- times the activity of fully-depleted uranium. The values we
+ -- compute here for the "radioactive" group value are based on
+ -- linear interpolation of activity along that scale, rooted at
+ -- a natural (0.7%-fissile) uranium block having the activity of
+ -- 9 uranium ore blocks (due to 9 ingots per block). The group
+ -- value is proportional to the square root of the activity, and
+ -- uranium ore has radioactive=1. This yields radioactive=1.0
+ -- for a fully-depleted uranium block and radioactive=2.6 for
+ -- a 3.5%-fissile uranium block.
+ local radioactivity = math.floor(math.sqrt((1+5.55*p/35) * 18 / (1+5.55*7/35)) + 0.5);
(ov or minetest.register_node)(block, {
description = string.format(S("%.1f%%-Fissile Uranium Block"), p/10),
tiles = {"technic_uranium_block.png"},
is_ground_content = true,
- groups = {uranium_block=1, not_in_creative_inventory=nici, cracky=1, level=2, radioactive=math.floor(math.sqrt(p) + 0.5)},
+ groups = {uranium_block=1, not_in_creative_inventory=nici,
+ cracky=1, level=2, radioactive=radioactivity},
sounds = default.node_sound_stone_defaults(),
});
if not ov then
@@ -192,3 +200,4 @@
})
end
end
+
--
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