[en] The objective of project 'KTA-2000' is the presentation of the reactor safety requirements in a comprehensive and hierarchic structure based on systematic approach. The pyramid shape of the new structure is based on the existing KTA safety standards. Existing gaps shall be closed according to the state of the art, new developments are included into plant assessment. The KTA safety standards determine and put the safety related technical requirements in concrete terms. It is understood that after fulfilment of these requirements the required precaution against damage is foreseen according to the state of science and technology and that the protection goals are achieved. Whereas the about 100 KTA standards are existing and under regular revision, the KTA fundamentals and the basis rules are presently in preparation. According to the KTA fundamentals the integral holistic safety concept is basically preventive and follows closely the defence-in-depths concept which has to be applied for the three main areas: technology, man and organisation. The requirements necessary to achieve the protection goals are described in the KTA Basis rules. The first four rules contain design-independent requirements, which can be directly assigned, to the four protection goals - Reactivity control, Cooling of fuel elements, Confinement of radioactive substances, and Limitation of radiation exposure. The structure within these rules follows essentially the following order: protection goal, partial protection goals, operational or safety functions assigned to the partial protection goals, safety level