Edexcel IGCSE Physics 7.21 Control rods & moderator
Practise matching reactor parts to their functions, especially how control rods absorb neutrons and moderators slow neutrons in fission.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- distinguish control rods from moderators in reactor diagrams or tick-box tables
- state that boron control rods absorb excess neutrons to regulate the reaction
- state that a graphite moderator slows neutrons by reducing their kinetic energy
7.21 Control rods and moderator question 1
[Maximum number: 1]
Some of the energy stored in the nuclei of atoms can be used to generate electricity.
A nuclear fission power station generates electricity.
State the role of the moderator in a nuclear fission power station.
reduce the kinetic energy of neutrons
Accept:
- slow down neutrons
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