Nuclear issues Flashcards Preview

GCSE Physics: Topic 7 > Nuclear issues > Flashcards

Flashcards in Nuclear issues Deck (11):
1

How do high levels of background radiation be harmful?

As it ionises substances it passes through

2

How much do nuclear power contributes to background radiation?

Very little 

3

What is the major source of background radiation in air?

Radon gas

4

Where is radon gas found?

Seeps through the ground from radioactive substances in rocks deep ungeround

5

How is radon gas a health hazard if breathed?

Emit alpha particles 

6

Examples sources of background radiation?

Cosmic rays from outer space

food and drink

nuclear weapon testings

medical applications such as X-ray

7

What do used fuel rods from nuclear power stations contain?

Lots of radioactive isotopes with long half-lives

8

What happens after unused uranium and plutonium has been removed for future use?

Rods must be stored in secure conditions for many years until radiation levels are safe

9

Example of nuclear fissions not acting safely?

Chernobyl in 1986

None of the reactors of that type aren't used now

designing safe nuclear power station

10

What depends on the effects of radiation time?

Types of radiation dose

exposure time

whether source is inside or outside of the body

11

What happens to risk of cancer the higher the dose of radiation?

Higher risk of cancer