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Transcript of Science
Enriched Uranium was being prepared for a fast breeder reactor
How Nuclear Energy is Made
Nucleus absorbs a neutron
Splits into two nuclei
Turns into heat
Three Mile Island
Emily Neher, Kalifornia Lacy, Anna Kneller
Temperature rose in reactor
Reactor automatically shut down
Relief-valve on the cooling system opened but didn’t close
Water had leaked that was supposed to cool down the reactor
Test to see how long reactor's turbines would spin without power
Upgrade and strength the plant design/equipments
Set “fitness - for - duty” programs for workers
Respond plans have to be tested by licensees several times per year
Set up the Institute of Nuclear Power Operation
Uniquely designed control rods caused a power surge
The amount of pressure detached the cover plate on a reactor
Increase of steam caused a steam explosion
After a critical mass was reached, the reactor started releasing gamma and neutron radiation
No explosion but fission products were being released
9.0 earthquake in the Pacific Coast of Japan
Tsunami caused by earthquake disabled the power for three of the reactors' cooling system
Out of the three reactors, all of them melted
Alert and notification
Start limited evacuations about 36 hours
Required to alert within 15 minutes
Many people unknowingly consumed contaminated milk and food.
“Almost a third more US West Coast newborns may face thyroid problems after Fukushima nuclear disaster”
"An EU-funded study concluded that Fukushima released up to 210 quadrillion becquerels of cesium-137 into the atmosphere."
The heat causes water to boil
Steam from water turns turbines
Turbines give energy to a generator which makes power
Defense in Depth and Safety
Defense in Depth
-Nuclear power plant workers have to go by this
rule so that another accident doesn't happen.
-Some of the rules include:
A. Control of Radioactivity
B. Maintenance of Core Cooling
C. Maintenance of barriers that prevent the release of radiation
-There are many more rules, but these are a few.
-Radiation doses are controlled via the following procedures:
A: The handling of equipment via remote in the core of the reactor
B. Physical shielding (hazmat suits, masks, etc.)
C. Limit on the time a worker spends in areas with significant radiation levels
D. Monitoring of individual doses and of the work environment.
The Zombie Zone
3 Mile Island accident and Chernobyl
Body temperature affects alertness
3 a.m. - 5 a.m.