Permanent installation of Unit 4 residual heat removal cooling system, residual heat removal cooling sea water system and emergency diesel generator cooling system Switching to the permanent cable for the electric motor of residual heat removal cooling seawater system pump (D system) Photo taken on April 25, 2012 Permanent installation of Unit 4 residual heat removal cooling system, residual heat removal cooling sea water system and emergency diesel generator cooling system Switching to the permanent cable for the electric motor of residual heat removal cooling seawater system pump (D system) Photo taken on April 25, 2012