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#PlutoniumEnergy 1.9.0 is out! (and so is 1.9.1 already) This update has been in the works for a while, but it's mostly graphics and balance changes. mods.factorio.com/mod/Plutoniu... #FactorioModding

The graphics part is the new breeder reactor heat pipes sprite. I've been working on it since July. I can still spot some problems around the edges where the reactor connects to other reactors and heat pipes, but it's pretty minor. One thing I hope to also fix in the future is the shadow.

The balance changes are addressing how absolutely busted MOX fuel was. Since it only took Plutonium-238 and Uranium-238 and could be used as a /substitute/ of Plutonium-239 in the breeder reactor, it almost entirely removed the need for advanced nuclear fuel reprocessing.

MOX fuel breeder cycle was entirely positive in the Plutonium-238 and Plutonium-239 amounts, and just took more Uranium-238 to run, only requiring a little bit of Plutonium-238 to bootstrap the process. The changes aim to make the rest of the recipes viable for obtaining Plutonium-239

In the new update, Plutonium-239 can initailly be obtained *only* through Advanced nuclear fuel reprocessing. This unlocks nuclear breeding as a trigger unlock instead of taking science packs. Nuclear breeding then allows researching the technologies for uses of Plutonum-239.