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Volume

The Power of Passive Cooling

Designing Resilient Nuclear Heat Removal Systems Without External Power

When the grid goes dark, the laws of physics must take over to save the core.

Strategic Objectives

• Master the mechanics of natural circulation and buoyancy-driven flow.

• Design fail-safe heat sinks that operate indefinitely without human intervention.

• Understand the hydraulic nuances of emergency cooling versus operational exchange.

• Implement advanced gravity-driven cooling systems for next-generation reactors.

The Core Challenge

Traditional active safety systems rely on pumps and power—vulnerabilities that lead to catastrophic failures during station blackouts.

01

The Philosophy of Passive Safety

02

Fundamentals of Decay Heat

03

Buoyancy-Driven Flow Mechanics

04

Natural Circulation Loops

05

The Boussinesq Approximation

06

Heat Sinks and Ultimate Heat Rejection

07

Gravity-Driven Cooling Systems

08

Two-Phase Flow and Boiling

09

The Heat Pipe Advantage

10

Passive Containment Cooling

11

Flow Instabilities in Natural Loops

12

The Role of Accumulators

13

Convective Heat Transfer Coefficients

14

Chimney Effects and Air Cooling

15

Thermal Stratification in Large Pools

16

The Hydraulics of Check Valves

17

Station Blackout Scenarios

18

Scaling Laws for Experimental Validation

19

Passive Autocatalytic Recombiners

20

Advanced Small Modular Reactors (SMRs)

21

Reliability Assessment of Passive Systems

Available eBook Editions