The S9G nuclear submarine uses a pressurized water reactor where highly enriched uranium fuel heats primary loop water above 2,000°C while keeping it liquid through high pressure; this superheated water then flows to a steam generator to produce steam that drives turbines powering the propeller. The reactor employs natural circulation, where hot water rises and cold water sinks, eliminating the need for coolant pumps at cruise speed and reducing noise. Power is controlled by hafnium control rods that absorb neutrons to slow the chain reaction when lowered or allow it to ramp up when raised. The fuel core is engineered to last the submarine's entire 33-year service life without mid-life refueling, representing a Navy first in submarine design.
Deep Dive
Prerequisite Knowledge
- No data available.
Where to go next
- No data available.
Deep Dive
How a Nuclear Submarine Reactor Works: S9G Explained #ShortsAdded:
A reactor the size of a living room powers a 7900 ton warship for 33 years without refueling. Here's how the S9G does it.
At its core, the S9G is a pressurized water reactor. Highlyenriched uranium fuel heats primary loop water held above 2,000 ptila C. Hot enough to glow but kept liquid by pressure.
That superheated water flows to a steam generator, boiling a separate secondary loop into steam that spins the turbines driving the propeller. Here's the S9G's quiet trick. Natural circulation.
Hot water rises, cold water sinks. No coolant pumps needed at cruise speed. No pumps means no pump noise.
Reactor power is controlled by halfneeium control rods. Drop them deeper into the core to absorb neutrons and slow the chain reaction. Lift them to ramp up.
The fuel core is engineered to last the submarine's entire 33 years service life. No midlife refueling, no cutting the hull open. That's a Navy first.
Quiet, compact, and basically endless.
Related Videos
U.S. Military Just Flexed The Most Dangerous Aircraft Ever Built The F-47
MaxAfterburnerusa
11K views•2026-05-29
Heating Staying On On The Hottest Day Of The Year
PlumbLikeTom
507 views•2026-05-29
발전 효율을 높이는 태양광 추적 시스템의 기술적 원리 #공학 #공정 #태양광 #알고리즘 #재생에너지
찐현장기술
2K views•2026-05-29
직관 및 곡관 배관 결합 고정 작업 #worker #process #fabrication #pipework #clamp
월드촌촌
2K views•2026-05-30
Wire To Wire Connection Trick | Strong And Secure Electrical Joint #shortvideo #wireworks
ElectricianTips-b1h
5K views•2026-06-02
Peterborough to Newark Northgate Driver's Eye View aboard an InterCity 225 - East Coast Main Line
TrainsTrainsTrains
822 views•2026-05-31
AI turbine design: hypersonic cooling leap #shorts #ai #hypersonic
bobbby_rn
671 views•2026-05-31
How Far Can A Tomahawk Missile Actually Travel?
WarCurious
13K views•2026-05-28











