This is the second ''Semiannual Report" of the Tennessee Valley Authority Inspector General. It describes the significant audit and investigatory activities of the office during the reporting period from October 1, 1986 to March 31, 1987.During this period, the Office of the Inspector General (OIG) has audited and investigated matters of critical importance to TVA, its employees, the public, and other Governmental officials. The OIG has investigated a number of employee concerns, nearly half of which involved issues raised by employees about TVA 's nuclear program.