Oregon State TRIGA Reactor


The OSTR is a water-cooled, pool-type research reactor that uses uranium/zirconium hydride fuel elements in a circular grid array.

The reactor is licensed by the USNRC to operate at a maximum steady state power of 1.1 MW and can also be pulsed up to a peak power of about 2000 MW.  The most important responsibility of the OSTR is to support Oregon State University’s academic programs.  Instructional use of the reactor is twofold.  First, it is used significantly for classes in nuclear engineering, radiation health physics, and chemistry at both the graduate and undergraduate levels to demonstrate numerous principles that have been presented in the classroom.  Second, shorter-term demonstration experiments are also performed for many undergraduate students in physics, chemistry and biology classes as well as for visitors from other universities, colleges, high schools and civic groups. 

The OSTR is a unique and valuable tool for a wide variety of research applications, and serves as an excellent source of neutrons and/or gamma irradiations.  The OSTR has a number of irradiation facilities providing a wide range of neutron flux levels and neutron flux qualities, which are sufficient to meet the needs of most researchers.  The most common OSTR irradiation facilities and their typical uses include:

Rotating Rack (Lazy Susan) - Neutron Activation Analysis 

Pneumatic Transfer Tube (Rabbit) - Neutron Activation Analysis 

Thermal Column (TC) - Fission Track 

In-Core Irradiation Tube (ICIT) - Ar/Ar (Geochronology), isotope production, radiation hardness testing

Cadmium-Lined In-Core Irradiation Tube (CLICIT) -  Ar/Ar (Geochronology), 1-MeV equivalent neutron damage 

G-Ring In-Core Irradiation Tube (GRICIT) - Ar/Ar (Geochronology), isotope production

Neutron Radiography Facility (NRF) - Neutron radiography, instrumentation testing, radiation hardness testing


Operating Statistics for 2011-2012

Thermal Energy Produced                         53.5 MWD

Time Reactor was Critical                          1381 hours

Time Reactor at full power                        1279 hours

Number of Irradiation Requests               279

Number of Samples                                   1116