A special case of LENR is considered, in which only two identical isotopes can react, accidentally found at the minimum possible distance from each other during a time exceeding the collision time of molecules in a gas. Such a situation occurs in anomalous objects with circulating light, in which the appearance of excess energy is observed. Such isotopes are coupled oscillators, between which energy exchange at a distance is possible under favorable phase relations. Since the energies of the electron shell and the nucleus are interconnected, energy exchange between nuclei is possible, which leads to an exchange of nucleons with the appearance of new isotopes and the release of excess energy. Two classes of isotopes have been identified. Producers can exchange nucleons with each other and produce new isotopes. Impotents do not have this property, but they arise as a result of LENR with the exchange of nucleons (LENREN) between producers. It turns out that 98.4% of the earth's crust is made up of just 10 elements. The 10 most common isotopes of these elements make up more than 90% of the weight of these elements. This means that the earth's crust is 90% made up of these 10 isotopes. Of these, 84.4% are impotents. Roughly speaking, the earth's crust consists mostly of impotents. This means that during the formation of the earth's crust, LENRENs occurred in the earth's mantle, in which the producers eventually turned into impotents. From the proposed explanation, it follows that LENRENs are reality and are responsible for the existing isotopic composition of the earth's crust. A complete list of 862 possible LENREN reactions between the existing 242 stable isotopes is given, of which 71 are impotents and 171 are producers. It is shown that as a result of LENREN, there is an accumulation of precisely those impotents that make up the composition of the earth's crust. These same accumulated impotents make LENREN difficult between the remaining producers, which leads to a decrease in the energy released, a decrease in temperature, and ultimately to the disappearance of conditions favorable for LENREN. The existence of LENREN in nature also opens up an alternative approach to explaining nucleosynthesis and an alternative explanation for the release of heat within the Earth. Heat can be released during LENREN, in contrast to the generally accepted explanation, in which the release of heat is associated with the radioactivity.
V. P. Torchigin (Mon,) studied this question.