Breeding blanket and needle: what they have in common

1. Step 1. Breeding blanket — is part of — Fast breeder reactor. Uranium-238 turns into plutonium.
2. Step 2. Fast breeder reactor — has part — Control rod. Control rods.
3. Step 3. Control rod — is made of — Silver. Control rods of pressurized water reactors are a silver–indium–cadmium alloy.
4. Step 4. Silver — is material for — Syringe. Early needles were silver.
5. Step 5. Syringe — has part — Needle. A hollow needle.

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