Nucleum

You must place a Worker on the tile when you place a railway tile and you may not choose the Railway option if you cannot obtain a Worker (you can spend Uranium to gain one in a pinch); placing on red railway spaces additionally costs 2 Thaler (see p.11).

You may use any completed rail lines (not just your own) to transport coal or Uranium to the selected plant; Uranium can only be transported if the plant has a Nucleum and from your connected Mines, and you can transport 1 Uranium by default plus +1 for each Turbine present (techs can modify this); if you use another player's Turbine you must pay them 1 Thaler per Turbine (see pp.15–16).

Electricity = 1 per transported coal, 2 per transported Uranium, plus any electricity from the Action tile, your Turbines, or Technologies; you then choose exactly one connected unenergized Urban Building whose requirement is ≤ the electricity produced, take its printed benefits and Achievement tokens, and flip it to its energized side (energized VPs score at game end, Praha double) (see pp.16–17 & p.21).

Each imported coal costs the price shown on the Coal Import Wagon in that import area and the import tiles are flipped/removed so the price progresses up to a maximum of 3 Thaler; discounts from your Special Directive or Turbine effects apply to the total amount spent on coal (not per individual coal) (see p.16).

If you place a Milestone on the “0” Achievement space you get a bailout of 2 Thaler and 1 Worker immediately, but each Milestone marker on that space costs you 3 VP at game end; Recharge also grants income, may trigger King's Day scoring when a Milestone space is emptied, and forces you to discard all Achievement tokens (see pp.17 & 19).

With the Contract action you take one Silver or Gold Contract (Purple cannot be taken this way), immediately place it into an empty Contract slot on your player board and receive the listed reward, then refill the offer from the same color draw pile (or from the other color if that pile is empty); drawing the last Contract from the last pile is an endgame trigger (see pp.14 & 22).