Research reactorA nuclear reactor designed mainly for generation of high neu... of the Hahn-Meitner-Institut, Berlin. BER II is a pool reactorReactor in which fuel elements are submerged in an open wate... with a thermal output of 15 MWMegawatt, million times the power unit of watt (W). 1 MW = 1..., commissioned on 9th Dec. 1973.