[en] The Fuel Test Loop which is essential to develop the new nuclear fuel was installed at HANARO in 2007. The commissioning test including on-power experiments on condition that the test fuel was loaded in the FTL was successfully accomplished in September, 2009. To get a safe and effective operation of the Fuel Test Loop which was installed in the core of HANARO, it is necessary to build up a reliability of the high pressure and high temperature systems which are simulated the operating condition of the nuclear power plant, and to fulfill an requirement of the users through the stable management, and to establish the safe operation technology of the FTL at HANARO site. To build an organization for safe and effective operation of the Fuel Test Loop, the progress of the test and supplement of the personnel during the commissioning stage have been reviewed. Not only status of the education and training for operator but status of the preparation of the operation manuals have been settled. A plan was brought forward by making an analysis of DOR for the operation and maintenance organization, control of the operation procedures, periodic inspection, control of a instrument calibration, water chemistry control, radioactive waste control, document control, the plan of operator licence(RO, SRO) acquirement, support users through the experience during commissioning. Safe operation of the FTL which is based on the systematic and perfect operation organization will contribute to the effective utilization of the HANARO