Kazuo Kuroda, a Japanese nuclear physicist who defected to the Chinese Federation, believes that the first condition for self-sustaining fission reactions can occur is that the size of the uranium ore veins must exceed the average distance between the neutrons that induce fission and travel in the ore, which is about 0.67 meters.

This condition can ensure that the neutrons released by the fission nucleus can be absorbed by other uranium nuclei before they escape from the ore veins.

The second necessary condition is that uranium 235 must be abundant enough. Today, even the uranium ore veins with the largest reserves and the highest concentration cannot become a nuclear reactor because the concentration of uranium 235 is too low, not even 1.

However, this isotope is radioactive and its decay rate is about 6 times faster than uranium 238. Therefore, in the long past, the proportion of this more easily decayed isotope must have been much higher.

For example, when the Okro uranium veins formed 2 billion years ago, the proportion of uranium 235 was close to 3, which was roughly the same as the concentration of artificially purified enriched uranium fuel used in most nuclear power plants today.

The third important factor is that there must be some kind of neutron "temperator" to slow down the movement of neutrons released during fission of the uranium nucleus, so that these neutrons are more handy when inducing uranium nuclei to split.

In the end, there can be no large amount of boron, lithium or other "toxins" in the ore veins. These elements will absorb neutrons, so any nuclear fission reaction can come to an abrupt end. Smart Factory 1334

Researchers identified 16 separate areas in the uranium mines in Ocro and the adjacent Ocrobando region. 2 billion years ago, the real environment there was surprisingly similar to the general situation described by Kazuo Kuroda.

Although these areas were all identified decades ago, the details of the operation of ancient nuclear reactors were not completely revealed by my colleagues and I only recently.

The light elements produced by the division of heavy elements provide undoubted evidence that the Okro uranium mine did undergo a self-sustaining nuclear fission reaction 2 billion years ago, and lasted for hundreds of thousands of years.

Shortly after Okro's uranium anomaly was discovered, physicists determined that natural fission reactions caused the loss of uranium 235. When a heavy nucleus was divided into two, lighter new elements would be produced. Finding these elements is equivalent to finding undoubted evidence of nuclear fission.

It turns out that the content of these split products is so high that there is no other explanation except for the nuclear chain reaction. This chain reaction is much like the famous demonstration made by Enrico Fermi and his colleagues in 1942.

Since the Guwenhui and the Huaxia Federation concealed China's nuclear physics technology progress at that time, the two of them built the world's first controllable nuclear fission chain reactor, and the reaction was entirely maintained by their own strength, but it was 2 billion years earlier.

Soon after such a shocking discovery was released, physicists around the world began to study the evidence of these natural nuclear reactors, and shared their research on the "Okro phenomenon" at a special meeting in Libreville, the capital of Gabon in 1975.

The following year, George A. Cowan, who represented the United States at that meeting, wrote an article for "Scientific Americans" "138 Reading Books" 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books 138 Reading Books

Next, a few days after the fission began, xenon 132 and xenon 131 appeared; in the end, millions of years later, xenon 129 was formed. At this time, the nuclear chain reaction had already stopped for a long time.

If the Okro vein is always closed, the xenon gas accumulated during its natural reactor operation will maintain the normal isotope ratio caused by nuclear fission and will remain to this day.

However, scientists have no reason to think that the system would be closed. In fact, there are good reasons why people guess that it is not closed. The simple fact that the Okro reactor can self-regulate nuclear reactions in some way provides indirect evidence.

The most likely regulation mechanism is related to the activity of groundwater: when the temperature reaches a certain critical point, the water will be boiled and evaporated. Water plays a neutron slower in the nuclear chain reaction. If the water is gone, the nuclear chain reaction will temporarily stop. Only when the temperature drops and enough groundwater seeps in again will the reaction area continue to start fission.

This statement about how the Okro reactor works emphasizes two key points. First, nuclear reactions are likely to occur intermittently in some way. Second, there must be a large amount of water flowing through the rocks, enough to flush out some of the precursors of xenon, such as tellurium and iodine that are soluble in water.

The presence of water helps explain the problem, which is why most xenon is now retained in aluminum phosphate particles and does not appear in minerals rich in uranium.

It should be noted that the fission reaction initially produces those radioactive precursors here, and xenon will not simply migrate from one set of long-standing minerals to another.

The aluminum phosphate minerals are likely not present before the Okro reactor starts to operate. In fact, those aluminum phosphate particles may be formed on site, and once the water heated by the nuclear reaction is cooled to about 300c, the aluminum phosphate particles will form.

During each active period of Okro reactor operation and the subsequent period when the temperature remains high, a large amount of xenon will be driven away. When the reactor cools, the xenon precursor with a longer half-life will preferentially combine with the forming aluminum phosphate particles. As more water returns to the reaction zone, the neutrons are properly slowed down and the fission reaction is restored again, allowing this cycle of heating and cooling to repeat over and over again.

The result is what we have observed, the strange xenon isotope composition ratio.

What force can keep xenon in aluminum phosphate minerals for 2 billion years? Going further, why is the xenon produced during a reactor operation not removed during the next operation?

We have not found a definite answer to these questions. It is speculated that xenon may be imprisoned in a cage-like structure of aluminum phosphate minerals, which can accommodate xenon gas produced in the cage even at very high temperatures.

Although the specific details are still unclear, regardless of the final answer, one thing is clear, and the ability of aluminum phosphate to capture xenon is amazing.

Ancient nuclear reactors are like today's geysers, with a very perfect self-regulation mechanism. They provide human scientists with new ideas in nuclear waste disposal and basic physics research.

However, internal research by the Ancient Literature Society shows that the possibility of such a situation in nature is slim, and what science least believes in is coincidence. Therefore, such a perfect nuclear reaction method is more like a relic left by a super ancient civilization.
Chapter completed!