Basic principle

Basic Principle (BP) is the highest level in the INPRO structure, which is a statement of a general goal that is to be achieved in an INS and provides broad guidance for the development of an INS (or a design feature thereof). The wording of an INPRO basic principle always utilizes the verb “shall” or “must”.
To achieve a sustainable INS, all BPs shall be taken into account in all areas considered within INPRO (economics, infrastructure, waste management, proliferation resistance, physical protection, environment, and safety). An example of a basic principle, taken from the INPRO area of safety, is that an INS shall incorporate enhanced defence-in-depth as a part of its fundamental safety approach and ensure that the levels of protection in defence-in-depth shall be more independent from each other than in existing installations. It should be noted that in some topic areas — primarily safety — even more general guidance compared with an INPRO basic principle is given in a General Objective. These General Objectives reflect a worldwide consensus and are valid for nnovative designs as well as for existing and evolutionary designs. They have been taken into account during the development of the INPRO basic principles.

See also

• User Requirement
• Criterion

	[ + ] Assessment Methodology
Areas of INPRO Sustainability Assessment Overview • Economics • Safety (Nuclear Reactors) • Safety (NFCF) • Waste management • Environmental Impact on Stressors • Environmental Impact from Depletion of Resources • Infrastructure Requirements Basic Principle • User requirements • Criteria