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Shielding

Four green illustrations showing gloves with the words "LIGHT SHIELDS; containers with the words "CONTAINER COVER", a person behind bricks with the words "LEAD" and "HEAVY SHIELDS", and a person looking through a wall with the word "CONCRETE". The illustration also reads "SHIELDS OF VARIOUS TYPES ARE PROVIDED".

Gamma, beta, alpha, and neutron radiation pose different risks to workers. Depending on the radiation type emitted from a source, workers use a specific recipe of time, distance, and shielding to protect themselves. Alpha radiation cannot penetrate a piece of paper. Even the outer layer of our skin can stop it, but alpha radiation is very dangerous inside the body. Gamma radiation is the most penetrating form of radiation and is the greatest concern externally. Thick shielding such as six or more feet of concrete or more than a foot of lead is required to stop gamma radiation.

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Hanford History Project

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Manhattan Project National Historical Park, Code: MAPR

Manhattan Project National Historical Park
Latitude: 35.8809471130371, Longitude: -106.301979064941

NPS.gov Collection

01/01/0001

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