Each year on Jan. 29, National Puzzle Day recognizes how exercising our brains with puzzles provides various benefits, including memory, cognitive function and problem-solving skills. 

Put your brain to work today while you learn more about what we do at Idaho National Laboratory.  

To download, click on each image, right click the PDF in the new window, and click “save as” to save to your computer or “print” to print directly from this page. 


Experimental Breeder Reactor-I 

Puzzle Day EBRI

Experimental Breeder Reactor-I is a National Historic Landmark where usable electricity was first generated from nuclear energy in 1951, powering the four lightbulbs you see below. 

It’s the only place in America where you can see four nuclear reactors — including two aircraft nuclear propulsion prototypes, a reactor control room, remote handling devices for radioactive materials, radiation detection equipment and much more. 




Advanced Test Reactor  

Puzzle Day ATRThe Advanced Test Reactor (ATR) is the only U.S. research reactor capable of providing large-volume, high-flux thermal neutron irradiation in a prototype environment.  

ATR’s unique serpentine core allows the reactor’s corner lobes to be operated at different power levels, making it possible to conduct multiple simultaneous experiments under different testing conditions.  





Advanced Visualization 

Puzzle Day CAVEThe Applied Visualization Laboratory in the Center for Advanced Energy Studies contains several 3D immersive environments for scientists and engineers to walk into their data, examine it and provide deep analysis in pursuit of their research. 







Natl Puzzle Day Word SearchCan you find all of the words related to the research we conduct at Idaho National Laboratory? Print out this word search and give your brain workout!