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Lake Anna Tritium

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John Crowley

on 24 October 2014

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Transcript of Lake Anna Tritium

Lake Anna Tritium
The Structure of an Atom
Some isotopes emit particles and energy called radiation
Effects of Exposure to Radiation
Apha - Ionizing radiation consisting of alpha particles that contain 2 protons and 2 neutrons.

Beta - Fast moving negatively charged electrons, the neutron turns into a proton by ejecting an electron.

Gamma- High energy rays with short waves.
Who wants to go for a swim? Or nah?
-Possibility of contracting Naegleria Fowleri which is a disease that eats away at brain tissue and commonly found in stagnant water
-Drowning. To prevent drowning, use floaties.
Tritium - what is it?
-Tritium is a radioactive isotope of hydrogen
-Has a half life of 12.3 years
-Emits beta radiation
The effects and concerns of tritium levels in Lake Anna
By John Crowley, Andre Winchell, & Ethan Flora
3 Types of Radioactive Decay
An atom is composed of a nucleus of Protons (positive charge) & Neutrons (negative charge) with orbiting electrons that are negatively charged
Effects of Alpha radiation
-External exposure (outside body) is virtually harmless
-Lack the energy to penetrate the dead layer of skin

-Internal exposure (inside body) by ingesting or being absorbed into your blood stream can cause a risk of developing cancer
Effects of being exposed to Beta Radiation
-Two types of effects Acute and Chronic

-Chronic Effects are much more common

-Low levels of external exposure over a long time (5-30 years) can cause Cancer

-Internal exposure can increase the risk of cancer

-Acute effects less common

-Acute radiation exposure causes an illness known as Acute Radiation Syndrome (ARS)

-ARS is also sometimes known as Radiation sickness

-This illness occurred in Chernobyl, Nagasaki, and Hiroshima

Effects of Exposure to Gamma Radiation
-Because of its power and ability to travel long distances Gamma Radiation is very dangerous

-Gamma radiation exposure also causes Radiation sickness

-The worst kind of Radiation damage comes from Gamma Radiation exposure
Isotopes are formed when the proton neutron balance is uneven, making the atom unstable.
Tritium levels in Lake Anna from one sampling point are 53,300 picocuries per liter. The EPA allows up to 20,000 picocuries of tritium per liter. Tritium emits alpha radiation which is harmless for the most part unless ingested or swallowed as it lacks the energy to penetrate skin.
Other Dangers
Other Types of Isotopes
Caesium 135
-Half life: 2.3 million years
-Mildly radioactive
-Low energy beta radiation
Iodine 129
-Half life: 15.7 million years
-Low energy beta & gamma radiation
Caesium 137
-Half life of 30 years
-Strong gamma radiation
-One of the most common fission products
Plutonium 239
-Half life: 24,000 years
-One of three main isotopes of Plutonium
Strontonium 90
-Half life: 28 years
-Beta decay
-Used in medical research
What is Radiation?
Full transcript