A tube bundle heat exchanger has been carried out, wherein a bearing structure defines at least a primary chamber, which is crossed by tubes made of a non-solderable material. The virtualization platform comprises integrated interceptor modules connected to the components via communication channels, each interceptor module being interposed in the communication channel connecting two components, and an integrated analyzing device connected to the interceptor modules and comprising a control device and a testing device. The greedy algorithm employed by this technique makes possible optimization of additional dimensions of treatment planning including, using directional and isotropic sources, using different source isotopes, using optimum source strengths, using source locations that are not on the regular grid and using a single movable source for variable times at different locations. The sidewalls each have a protruded flange respectively disposed at an outer side for grounding with a grounding metal frame. The process permits easily fractionating the oil composition into a solid oil composition and a liquid oil composition.