BWR schematic.
1. Reactor pressure vessel (RPV)
2. Nuclear fuel element
3. Control rods
4. Circulation pumps
5. Engine control rods
6. Steam
7. Feedwater
8. High pressure turbine (HPT)
9. Low pressure turbine
10. Generator
11. Exciter
12. Condenser
13. Coolant
14. Pre-heater
15. Feedwater pump
16. Cold water pump
17. Concrete enclosure
18. Mains connection