Subject 26 · Advanced Fission & Fusion
Chapter 26
Advanced Fission & Fusion
Follow a neutron economy from one fission to a controlled chain, then cross to fusion, confinement, radiation safety, waste, and reactor dynamics.
Build advanced fission & fusion one idea at a time.
Start with the foundations, then explore advanced ideas and calculus at the depth your course needs.
6 of 6 lessons
Chain Reactions & Criticality
Use induced fission, thermal neutrons, and multiplication factor k.
Inside a Fission Reactor
Connect fuel, moderator, control rods, coolant, and delayed neutrons.
Fusion & the Coulomb Barrier
Calculate D–T energy and explain temperature and tunnelling.
Fusion Technology
Compare Lawson criterion, tokamaks, laser fusion, and net-power claims.
Radiation Safety & Nuclear Waste
Use grays, sieverts, ALARA, shielding, and half-life trade-offs.
Fission & Fusion Calculus
Solve point kinetics, decay chains, and tunnelling factors.
Change one variable. Watch the physics respond.
Explore N = N₀kᵍ, then take the idea into the full lessons.
Test a chain reaction
Initial population fixed at 100. The chain grows above criticality.
Everything around the chapter, in one place.
Keep building with practice, classroom presentations, formulae, and a game that puts these ideas to work.
Exam practice
Questions, guided reasoning, and exam-style problem solving.
Browse exam questions →Formula toolkit
Keep the key relationships and their units close to hand.
Review formulae →Members · Classroom presentationClassroom slides
Reveal lesson ideas, examples, and checks in full-screen classroom mode.
Open slides →Lesson files
Find downloadable teaching resources and worksheets in the library.
View files →Critical Point
dN/dt = (k−1)N/τ. Ride the control rods and hold a simulated core at criticality without scram.
Play the free chapter game →See it. Read it. Work it.
Connect diagrams to physical relationships and exam reasoning.
Explore diagrams →Guided support
Ask for a hint, check your reasoning, or explore a similar problem.
Ask GioAI →Key ideas to remember
Move without losing your place.
Extra challenging questions
Take the ideas further with course-specific extension questions, supplied-data graphs and worked solutions.