Different methodologies devoted to qualify NPP system-code nodalizations rely on kv-scaled calculations as an essential tool for their purpose. In the framework of Power-To-Volume strategy, a Kv-scaled calculation is a simulation in which, defined ITF test conditions are scaled-up to a NPP nodalization to reproduce the same scenario. Following the steps established in UPC's SCUP methodology, such calculations become really useful when two different kinds of them, the so-called "pure scaled" and

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... "hybrid" are properly combined. The paper starts summarizing the most relevant features of UPC's methodology and its validation process. It also includes important aspects of the usefulness of hybrid calculations in their role of explaining distortions appeared when a plant simulation is compared scaled-up version of test results. Some ideas on the forthcoming uses of hybrid nodalizations are also presented. Among such uses the most significant is the support to test design. Hybrid calculations are used to justify facility modifications. This particular, despite being more specific for future modular ITFs, is illustrated in the paper for minor changes in existing facilities.