Nuclear Power and waste

Question 1

Process of fission

Answer 1

U-235 absorbs neutron, its nuclei split, releasing thermal energy and more neutrons

Question 2

Moderator material

Answer 2

Graphite/water
Don’t absorb neutrons

Question 3

Moderator function

Answer 3

slow down fast neutrons by colliding w/ nuclei in moderator, causing them to lose energy. they are also elastic therefore slow down them even more

Question 4

Control rods material

Answer 4

Boron/steel

Question 5

Control rods function

Answer 5

lowered into reactor to absorb neutrons

Question 6

Coolant

Answer 6

circulates through tubes in reactor core to absorb heat

Question 7

Low level waste sources

Answer 7

clothing worn by workers, paper and rags

Question 8

Low level waste %

Answer 8

90%

Question 8

Low level waste radioactivity %

Answer 8

1%

Question 8

Low level waste disposal

Answer 8

compacted and encased in cement and stored on licensed sites

Question 8

Intermediate-level waste sources

Answer 8

Occurs in chemical sludges and resins

Question 9

Intermediate level waste %

Answer 9

7%

Question 10

Intermediate level waste radioactivity %

Answer 10

4%

Question 11

Intermediate level waste long half life disposal

Answer 11

encased in cement in steel drums and stored underground

Question 12

Intermediate level waste short half life disposal

Answer 12

drums containing isotopes placed in deep trenches and covered by metres of soil

Question 13

High level waste %

Answer 13

3%

Question 14

High level waste radioactivity %

Answer 14

95%

Question 15

High level waste disposal

Answer 15

mixed w/ molten glass and solidified in stainless-steel containers and stored in special facilities

Question 16

Spent fuel rods

Answer 16

continue to emit head and have to be cooled
fuel rods stored under water which acts as a coolant