1 / 9

RADIATION LAB TIME - DISTANCE - SHIELDING

RADIATION LAB TIME - DISTANCE - SHIELDING. Health Physics Society - Power Reactor Section Radiation Science Education. #1 - Take a background measurement. Use the lower scale - counts per minute (c/m).

katy
Télécharger la présentation

RADIATION LAB TIME - DISTANCE - SHIELDING

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 LABTIME - DISTANCE - SHIELDING Health Physics Society - Power Reactor Section Radiation Science Education

  2. #1 - Take a background measurement. Use the lower scale - counts per minute (c/m). #2 - Measure the radiation level on contact with the plate or mantle using the open window detector. #3 - Place a medium thick piece of material (wood) over the object and repeat the measurement. #4 - Place a very thick piece of material over the object and repeat the measurement. ______ c/m ______ c/m ______ c/m ______ c/m Radiation Measurements

  3. Shielding

  4. The first measurement included beta and gamma radiation from the plate/ mantle plus background radiation (alpha radiation was too weak to pass through the detector wall). All the beta radiation was shielded by the medium thick material so #3 measured gamma only. Nearly all of the gamma radiation was shielded by the very thick piece of material.  +  = #2  = #3  = #2 - #3 background  #4 Shielding

  5. If you increase the shielding around a radiation source, it will decrease your exposure. If you stand out in the rain without an umbrella, you will get wet. But, if you use an umbrella to shield you from the rain, you will remain dry and protected. Shielding

  6. Measure the radiation level at the surface of the plate or mantle. Move 2 inches away and repeat the measurement. Move 12 inches away, repeat the measurement. Move 3 feet far away, repeat the measurement. ______ c/m ______ c/m ______ c/m ______ c/m Distance

  7. The farther away you are from a radiation source, the less exposure you will receive. Compare this to sitting in front of a fireplace. You can sit directly in front or across the room. If you are far from the source, your exposure would be much lower. Distance

  8. Place the lantern mantle in your pocket and take a open window measurement. If you leave it there for 4 hours, how many counts does your leg see? If you leave it there for 24 hours, how many counts does your leg see? _________ c/m c/m * 4 hours * 60 min/hr = _____ counts c/m * 24 hours * 60 min/hr = _____ counts Time

  9. Time • Decrease the amount of time you spend near the source of radiation, and decrease the amount of radiation exposure you receive. • If you spend a lot of time on the beach, ultimately you get a sunburn. But, if you spend less time in the sun, you won’t.

More Related