radiation lab time distance shielding l.
Download
Skip this Video
Download Presentation
RADIATION LAB TIME - DISTANCE - SHIELDING

Loading in 2 Seconds...

play fullscreen
1 / 9

RADIATION LAB TIME - DISTANCE - SHIELDING - PowerPoint PPT Presentation


  • 141 Views
  • Uploaded on

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).

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'RADIATION LAB TIME - DISTANCE - SHIELDING' - katy


Download Now 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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
radiation lab time distance shielding

RADIATION LABTIME - DISTANCE - SHIELDING

Health Physics Society -

Power Reactor Section

Radiation Science Education

radiation measurements
#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
shielding4
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
shielding5
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
distance
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
distance7
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
slide8
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
slide9
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.