1 / 85

Radiation

Radiation. Radiation Scare. Atomic Bomb - Hiroshima Aug. 6,1945 Nagasaki Aug. 9, 1945 Three Mile Island - 1979 Chernobyl - 1986. Radiation - Positive Uses. Medical Diagnosis Medical Treatment Food Irradiation Mail Irradiation Energy Defense Industrial. Nuclear Scientist.

harper-melendez
Download Presentation

Radiation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Radiation

  2. Radiation Scare • Atomic Bomb - Hiroshima Aug. 6,1945 Nagasaki Aug. 9, 1945 • Three Mile Island - 1979 • Chernobyl - 1986

  3. Radiation - Positive Uses • Medical Diagnosis • Medical Treatment • Food Irradiation • Mail Irradiation • Energy • Defense • Industrial

  4. Nuclear Scientist • Ernest Rutherford • Wilhelm Roentgen • Henri Becquerel • Pierre & Marie Curie • Niels Bohr • Max Planck • James Chadwick • Otto Hahn

  5. Einstein’s Formula E=MC2

  6. Atomic Scientist

  7. Manhattan Project • J. Robert Oppenheimer • General Leslie R. Graves • Edward Teller, Luis Alvarez, Eugene Wigner, Maurice Wilkins, etc, etc • Los Alamos - 1943 • 2 billion cost • 125,000 people involved

  8. Atomic Bomb • August 2, 1939 - Einstein’s letter to FDR warning about Germany’s effort to purify U-235 • Manhattan Project 1939 - 1945 • July 16, 1945 first bomb exploded - Gadget Los Alamos NM • August 6, 1945 Hiroshima • August 9, 1945 Nagasaki

  9. Hiroshima • August 6, 1945 dropped from Enola Gay • “Little Boy” 4&1/2 tons • 10 kiloton • 66,000 killed 69,000 injured • Total vaporization one half mile • Total destruction one mile • Everything burned 2 1/2 miles

  10. Nagasaki • August 9, 1945 • Plutonium bomb - “Fat Man” • 10 kilotons • 39,000 killed 25,000 injured • Used only 1/10 of 1 percent of explosive capability

  11. Atomic Bomb Effects • Blast - speed of sound 12.5 miles/min • Heat - fireball vaporizes, inverse square law • Radiation - prompt, inverse square law • Radiation - fallout

  12. Fallout Products • Iodine-131 • Strontium-90 • Cesium-137 • Over 200 radioactive products

  13. Byproducts of A-Bomb • Radioactive fallout for miles in rain • Radiation poisoning • Increased incidence of cancer - leukemia • Genetics effects on future generations • Massive disruption of communications, travel and machinery • Electro - Magnetic pulse scrambles electronics in copper wires - 50 miles

  14. Blast Effects20 Megatons • Vaporization 8.75 • Total Destruction 14 • Severe Blast Damage 27 • Severe Heat Damage 31 • Severe Fire, Wind 35

  15. Blast Effects 20 Megatons • Vaporization 8.75 • Total Destruction 14 • Severe Blast Damage 27 • Severe Heat Damage 31 • Severe Fire , Wind 35

  16. Dirty Bomb • Uses conventional explosives • Radioactive material inside • Most likely radioactive material is Cesium-137 Half life 30years • Creates more terror, havoc and panic rather than immediately kill

  17. Radiation Units • R - Roentgen amount of ionization in air • Rad - radiation absorbed dose • Rem - radiation equivalent man • Sievert (Sv) - international unit of radiation equivalency • Gray (Gy) - unit for energy absorbed • 1Gy = 1Sv = 100 rad = 100 rem

  18. Curie & Becquerel (Bq) • 1 Bq is 1 disintegration/sec • 1 curie = 37 Billion Bq 3.7X10x10 • 1 MBq = 27 microcuries • 1 GBq = 27 millicuries • 37 GBq = 1curies • 1 TBq = 27 curies

  19. Background Radiation Sources • Earth - food and water • Space - cosmic rays • Atmosphere - Radon gas from earth’s crust

  20. Airport X-Ray Security Scanners • Backscatter superficial scanning • Dose - 0.1 microsevert • Would need to go through the scanner 1000X times to equql a chest X-ray or 200,000 times to equal a CT scan • Scan daily for your entire life wouldn’t equal a CT scan

More Related