I first heard about the Mi-Vision system from MionTec on the VGB Chemistry Conference in 2018, where Dieter Mauer presented the system, and we had a good talk about the possibilities for using the system at our power plants in Ørsted in Denmark. In 2019 we arranged with MionTec to rent the system for period at one of our power plants, the Asnæs Power Plant in Kalundborg. At this power plant we have three demin water lines, all three consisting of three IEX stages plus degasser and an upstream scavenger stage. With the Mi-Vision system we obtained a much better understanding of the demin plant, and the plant has been optimized in relation to the regeneration of the scavenger, throughput and chemical consumption with a significant cost saving as a result. Besides that, we have achieved knowledge about the conditions of the resins in the plant, which is helping us in the future planning of exchanging the resins. We are planning on using the Mi-Vision system as a trouble-shooter and an optimization tool occasionally and when needed. Renting the system for a couple of months together with the huge knowledge available in MionTec, will help us in optimizing our demin plants and to obtain potential cost savings.