The new owners of the bankrupt German department store chain Galeria Karstadt Kaufhof plan to keep more than 70 of the chain’s 92 stores open, the bankruptcy administrator announced on Wednesday. A consortium made up of US private equity firm NRDC and German businessman Bernd Beetz have agreed to buy the troubled retail chain out of bankruptcy, in a deal first announced on Tuesday. Stefan Denkhaus, the attorney administering the company during bankruptcy proceedings, said the plans to keep at least 70 of the stores open was included in the investor agreement, which was notarized on Tuesday. Ho…