U13 Chem- Half-lifes

Half life

The time it takes for ONE HALF LIFE of a sample to undergo radioactive decay

**vary in length and depend on isotope

half life formula

T = # x L

WHERE: T is TOTAL TIME

# is (NUMBER OF HALF LIVES)

L us (LENGTH of a half life

Nuclear FIssion

“TO SPLIT”

LARGE Nuclei SPLITS into 2 SMALLER nuclei

**More commonly used within Power Plants

Less energy

Nuclear FISSION has _________ energy

Chain reaction

When Neutrons hit OTHER nuclei

Critical mass

SMALLEST amount of FISSIONABLE MATERIAL needed to sustain a chain reaction

Power Plants

Uses energy as HEAT from nuclear FISSION to produce ELECTRICAL ENERGY

Made of Three closed loops

• Reactor loop

• Steam loop

• Condensing loop

Reactor Loop

Fission reactions on FEUL RODS heat up pressurized water

CONTROL RODS help to control limiting of free neutrons

PRESSURE CHAMBER protects this portion covered by a CONTAINMENT STRUCTURE

Feul rods

Heat up pressurized water

Steam Loop

Water HEATED by reactor loop inside the STEAM GENERATOR

Water turns to steam and propels a TURBINE, which runs a generator to make electricity

steam PRECIPITATES out in the CONDESNER

Condensing loop

UPTAKE of water from Lakes or Rivers which COOLS DOWN the steam loop

Warm water is then STORED IN COOLING TOWERS or released back into body of water

Nuclear Fusion

“To COMBINE”

2 SMALL Nuclei COMBINE to make a LARGER ATOM

MORE ENERGY than fission

**RUNS STARS + SUN

More energy

Fusion contains ________ energy

Stars and Sun

FUSION deals with the _____ and ______, thus why we can’t quite comprehend its usage