50 YEARS OF OPERATION 4 5 1 Inside ATR before July 2, 1967, making sure fuel elements fit properly. 2. Core of the ATR at power, exhibiting the blue Cherenkov Effect. 3. Looking west at ATR Complex; ETR (left), MTR (middle) and ATR (right). 4. ATR reactor top. 5. ATR Complex at night with evaporation ponds in the foreground. 6. ATR Complex aerial view from the NW to SE. 6