ETRR-1 or ET-RR-1 (Experimental Training Research Reactor Number one, and sometimes called Egypt Test and Research Reactor Number one), is the first nuclear reactor in Egypt supplied by the USSR in 1958. The reactor is owned and operated by Egyptian Atomic Energy Authority (AEA) at the Nuclear Research Center in Inshas, 40–60 kilometres (25–37 mi) northeast of Cairo. ETRR-1 is the second oldest research reactor in the Middle East, after the Israeli IRR-1 reactor.