[en] Automatic translation: 1 Introduction: To discuss and update the boundary conditions and input data for the design of the HTR side reflector took place on December 9th, 1980 at a special meeting of HBK-AK 4 '' Graphite '' with the participation of representatives of HRB, GHT, SIGRI, KFA and HBK-PL instead. At the meeting, the occupancy and security of the present records was discussed for ATR-2E and ASR-IRS in terms of their behavior (dimensions, modulus of elasticity, Creep, strength and CTE) checked under irradiation and a joint Data basis for further calculations for the HTR side reflector agreed and adopted by mutual agreement. Further points of discussion were those that have been reached or considered achievable so far Manufacturing and development goals to be considered in the ATR-2E and ASR-RS program (Table 1), the influence of the neutron flux spectrum on the graphite behavior, the equivalent temperature concept, the relevance of 2D / 3D calculations as well as a report from HRB on the design of the wear reflector.