It is important to understand that there is a input power threshold limit in which transmutation begins to be produced by the LENR reaction. The more that this threshold is exceed, the more transmutation related damage to the reactor is produced by the reaction. This threshold is not very large. As a inventor, you may build a reactor that might work for a day, or a weak, or maybe even a month but it might not last for a year because of the damage that transmutation produces over time. Transmutation is not produced by fusion. The more input power that is applied to the system, the heavier (greater atomic numbers) that the transmuted elements will be that are being produced. Transmutation is a process related to vacuum decay. The LENR reaction is profoundly complicated and confusing. Many processes are happening concurrently possibly even fusion. Fusion cannot produce transmuted copper or lead. But if transmutation is occurring, you are assured that the vacuum reaction is causing it.
I found the spot in the Egely video where he briefly describes this transmutation based threshold he has discovered and set the time to it as follows