272 



Idaho Falls, ID., U.S.A. 



TRANSIENT REACTOR TEST FACILITY (TREAT) 

 Argonne National Laboratory (ANL) 

 U.S. Dept. of Energy 



"Big Science" Descriptor ; Nuclear reactor research 



Description of Facility/Instrument : TREAT Is an air-cooled thermal 

 reactor designed to test reactor fuels and materials under 

 conditions simulating various types of nuclear excursions. 

 It has the capability to obtain full temperatures up to 

 600°C, reactor periods as short as 20 milliseconds, an 

 energy release of 2,500 megawatts, and shaped power tran- 

 sients under computer control. Fuel motion measurements 

 can be made with a neutron hodoscope. 



Date of Construction: Began in 1957, criticality was achieved in 



1959 

 Construction Cost : Original ; $ 2 million 



1984 $$ : $75 million 



Present International Cooperation 



Nationality(s) of Ownership : U.S. 

 Natlonality(s) of Operational Funding : U.S. 

 Nationality(s) of Management Staff : U.S. 

 Nationality(s) of Researchers : U.S., U.K. 



Potential for Future International Cooperation : No near-term interest 

 is evident. 



Mi to, JAPAN 



JOYO 



O-arai 



Power Reactor and Nuclear Fuel Development Corporation (PNC) 



"Big Science" Descriptor : Nuclear test reactor 



Description of Facility/Instrument : This 100 megawatt-thermal (no 

 electricity production) fast flux test reactor is fueled with 

 uraniura-plutonium dioxide enriched to 23 without U-235 and cooled 

 with sodium. It is used to test fuels and reactor operational 

 characteristics. 



Date of Construction : Began in 1970, criticality was achieved in 1977 



Construction Cost : Original : more than $25 million 



1984 $$ : more than $50 million 



Present International Cooperation 



Nationallty(s) of Ownership ; Japan 

 Nationality(s) of Operational Funding : Japan 

 Nationality (s) of Management Staff : Japan 

 Nationality (s) of Researchers: Japan-U.S. 



