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Public Domain Picture: How to Open the World's Heaviest Door

Courtesy: US Department of Energy
Views: 34 | Downloads: 1
How to Open the World's Heaviest Door
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This work, identified by PublicDomainFiles.com, is free of known copyright restrictions.
Title:
How to Open the World's Heaviest Door
Description:
For 35 years, the Energy Department has pursued an all-of-the-above energy strategy — and the critical work done at the National Labs has helped put America at the top of the global clean energy race. This photo from 1979 shows a Lawrence Livermore National Laboratory employee opening the world's heaviest hinged door, which was eight feet thick, nearly twelve feet wide, and weighed 97,000 pounds. A special bearing in the hinge allowed a single person to open or close the concrete-filled door, which was used to shield the Rotating Target Neutron Source-II (RTNS-II) -- the world’s most intense source of continuous fusion neutrons. Scientists from around the world used it to study the properties of metals and other materials that could be used deep inside fusion power plants envisioned for the next century. | Photo courtesy of Lawrence Livermore National Laboratory.
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Views:
34
Downloads:
1
Date Added:
June 2, 2014
Download: Largest
Size: 754 x 1024
File size: 430.8 KB
File type: jpg
Free
Public Domain

Why is this picture in the Public Domain?

Produced by United States Government
The file available on this page is a work of the United States government. A work of the United States government, as defined by United States copyright law, is "a work prepared by an officer or employee of the U.S. government as part of that person's official duties." In general, under section 105 of the Copyright Act, such works are not entitled to domestic copyright protection under U.S. law.
US Department of Energy

Where is this picture from?

US Department of Energy (Flickr Photostream)
External Site: US Department of Energy
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