page_title: Omega West Reactor
hierarchical_section_title: Omega West Reactor
caption_attribution_description: English: The core of the LANL Omega West Reactor, showing Cherenkov Radiation.
context_page_description: The Omega West Reactor was an experimental nuclear reactor located at Los Alamos National Laboratory in Los Alamos NM. OMR was completed in 1956 and primarily used for scientific scale nuclear research until it was fully decommissioned in 1994. It operated 24 hours a day, five days a week until 1972, when it went to eight hours a day, five days a week operation. The original purpose of the reactor was to collect nuclear material properties in support of the United States nuclear weapons program. Other uses included production of useful medical isotopes. The reactor was capable of producing an external beam of neutrons via beam tubes which extended through the reactor shielding. These were provided for external neutron beam experiments including: neutron radiography, neutron capture studies, gamma ray studies, neutron cross section measurements and neutron activation studies.
  The reactor's low-pressure design and tall vertical vessel made it possible for a lead glass window to be installed at the top, through which the active core could be viewed directly.
  Very few production nuclear reactors were ever designed with viewing windows.
context_section_description: The Omega West Reactor (OWR) was an experimental nuclear reactor located at Los Alamos National Laboratory in Los Alamos NM. OMR was completed in 1956 and primarily used for scientific scale nuclear research until it was fully decommissioned in 1994. It operated 24 hours a day, five days a week until 1972, when it went to eight hours a day, five days a week operation. The original purpose of the reactor was to collect nuclear material properties in support of the United States nuclear weapons program.  Other uses included production of useful medical isotopes.  The reactor was capable of producing an external beam of neutrons via beam tubes which extended through the reactor shielding.  These were provided for external neutron beam experiments including: neutron radiography, neutron capture studies, gamma ray studies, neutron cross section measurements and neutron activation studies.
  
  The reactor's low-pressure design and tall vertical vessel made it possible for a lead glass window to be installed at the top, through which the active core could be viewed directly.  
    Very few production nuclear reactors were ever designed with viewing windows.  The blue glow seen in the picture is characteristic of Cherenkov radiation.
caption: The active core of the Omega West Reactor.
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