Black technology starts from the steel suit

Chapter 221 221 High Power Nuclear Battery (Change Tomorrow)

September 9th, today is a good day. It is a rare day in the capital without strong wind and sand. It is a good time to do a test.

"Wait, Professor Wang, how did you determine that today is a good time to do the experiment?"

"Could it be possible, Professor, that you still know some principles of the Book of Changes?" The people present were a little nervous. If this boss would stop studying science and instead study theology like Lord Niu, that would be too much.

"That's not true. I played mahjong with my mother-in-law yesterday and won a lot. Generally speaking, luck doesn't only last for a day or two, so today must be a good day. I didn't run away!"

Speaking of this, Wang Feng was also a little helpless, he didn't want to win, but the problem was that the card was so good, he was really reluctant not to win, and the goldfish had already been caught, so there was no reason to continue baiting.

Everyone: .
"Professor Wang, you are really humorous!" Feng Yuxiu couldn't laugh or cry. If it were him, he would not dare to win money from his mother-in-law. After all, he might have to rely on his mother-in-law to save the situation in the future!
"Okay, let's start the experiment. After all, we have spent so much money to finally perfect our theoretical model, especially the correlation mechanism." Wang Feng said with emotion. Fortunately, it was not his own money that was spent. Otherwise, he would be really reluctant. After all, this thing will definitely not enter the civilian market in the future, and the military market... that's the case.

"It's really not easy to complete this experiment. China National Nuclear Corporation has only rushed out two units, so everyone is in elementary school. If something goes wrong, we really have no place to find the third one in a short time." Feng Yu Xiu looked at the machine in front of him, which was similar to an NMR instrument, and it was hard to imagine that Zhongnuo could make superconducting magnets so small.

With the engineering difficulty of this thing, I am afraid that only China National Nuclear Corporation can handle it, and the others are worse.Without this technology and this ability.

This is a machine that can effectively accelerate the accelerated decay of radioactive substances at a magnetic field strength of about 5t. Considering the strong penetrating ability of gamma rays, they cannot use cobalt-60 this time. This thing is more dangerous .

The radioactive element used this time is strontium-90, which produces beta decay. When beta decay occurs, a large amount of electrons and decay energy, that is, heat energy, are released. Its unit thermal power can even reach a level close to 1kw. The half-life Reached 28 years.

So there is a huge amount of energy inside this thing.

Of course, this is not the point. Not all energy can reach this level, and there are even those that far exceed it, such as polonium-141 that reaches 210kw/kg.

The point is that this radioisotope is not only moderate in power, but also high in safety and security. It is one of the most widely used radioisotopes at present, and its working voltage is relatively high.

People have been using this aspect for a long time. The radioactive isotope heat source can further convert thermal energy into electrical energy through a thermoelectric conversion device, which is a "radioactive isotope battery".

Radioisotope batteries are mainly used in space flight and space exploration, marine engineering, biomedicine and other fields.Although the cost of radioisotope batteries is very expensive, it is considered to be a good space power source, and it is often in a state of competition with solar cells.

The United States has used radioisotope batteries many times in space development such as artificial satellites, spacecraft, lunar scientific experiment stations, and planetary probes.

In marine engineering, hundreds of radioactive isotope batteries have been invested all over the world. It has been used in offshore lighthouses and sea surface navigation marks, underwater sonar generators and submarine microwave relay stations, and can also be used as swimming weather stations and diving suit heaters. power supply.It is more reliable than solar cells, unaffected by waves and weather, and has a long service life.

实际应用的最多的是钚-238(Pu-238)和锶-90 (Sr-90)两种。美国能源部研究的SNAP系列空间用放射性同位素温差发电器基本上都采用Pu-238作为同位素热源，而Sr-90在作为地面用的同位素热源中应用较为广泛。

There are many reasons, but one of the more important reasons should be that its output is relatively large. It is one of the products after nuclear fission, and it has a relatively large share.

After a heavy nuclear atom is hit by a neutron, it fissions into two lighter atoms, which are the initial fission products.Due to the high neutron content of heavy nuclei, about 60% (for example, plutonium-239 contains 145 neutrons), and the low neutron content of light stable nuclei (50%~55%), fission products contain excessive Many neutrons.

These neutron-rich fission products all eventually become stable nuclei through a series of beta decays (reactions that turn neutrons into protons), which will produce a series of radioactive fission products, each of which maintains a different mass number. change, all end in a stable core.For example, krypton-92 → rubidium-92 → strontium-92 → yttrium-92 → zirconium-92.

Due to the hidden danger of nuclear leakage in nuclear reactors, radioactive fission products have received widespread attention.In fact, it is also very fortunate that there are no fission products with a half-life between 20 and [-] years, so radioactive fission products can be divided into two categories, one is highly radioactive, but it can decay completely within hundreds of years;

The other kind of radioactivity is very weak, and their radioactivity is lower than that of corresponding fissile materials, that is, radioactive minerals. The method of backfilling mine pits with waste materials can achieve "the nuclear industry reduces the total radioactivity of the earth's crust".

Among the fission products of the first type of strong radioactivity, most of the half-lives are very short, and they are quickly consumed within a few months of leakage, but several nuclides have half-lives ranging from several years to decades, listed in the above table " Medium-lived nuclear fission products", whose effects will last for tens to hundreds of years.

The most noteworthy of these are cesium-137 and strontium-90, both of which have a half-life of about 30 years (very long life) and high fission yields (large yield), and these two nuclei are fission products. The main source of radioactivity over the years to hundreds of years (because other strongly radioactive nuclei are either depleted within a few years, or the levels are too low).

Both cesium-137 and strontium-90 have significantly higher yields and decay energies than the other nuclides.Unfortunately, these two medium- and long-term radiation main nuclides happen to be easy to enter the living body: the chemical properties of cesium and strontium are similar to potassium and calcium respectively, and they are easily absorbed by the human body, especially strontium is easy to replace calcium and deposit in the body. Therefore, the recycling or detoxification of cesium-137 and strontium-90 is very important.

In addition, some extremely short-lived radioactive products have also attracted much attention, especially iodine-131, which can be easily absorbed and enriched by the human body, although it can decay in a few months; in addition, cesium-134 and strontium-89 are other The two short-lived and strong radionuclides harm the human body in the same way as cesium-137 and strontium-90, but the harm time is more concentrated.

In layman's terms, it decays quickly and has a short half-life.

"The strontium-90 radioactive heat source is in place, should we start the experiment now?"

"Get ready to start. If you start, set it at 10 times the acceleration. 1/20 of the rated speed should be a relatively safe number." Wang Feng thought for a while and ordered.

The voice came out through the intercom. Although sufficient safety settings had been made, everyone still put on protective clothing. After all, if something really went wrong, it was not a joke.

The signal light flickered slowly after the power was turned on, which indicated that it had entered the experimental stage. After seeing that the Roentgen value did not exceed the normal range and the Geiger counter outside was normal, everyone continued to operate.

Then slowly began to increase the strength of the magnetic field, and soon the magnetic field strength in the instrument has reached 0.5t, which can already be called a relatively strong magnetic field.

Although people looked at the other side, the thermal power and electric power of the heat source began to rise rapidly, from 0.92kw to 9.2kw in a blink of an eye.

Of course, this number is not surprising to them. After all, in the previous period, they had increased the speed to 1 times. Even if a more powerful magnetic field could be provided, they might be able to increase their acceleration ability. Get higher!
It's just that superconducting technology is not developed enough at present, and superconducting materials with relatively good thermal conductivity and relatively high transition temperature have not yet appeared. At present, it can only achieve this level.

"Pay attention to observation and record data!"

"Focus on its stability, safety first."

"The values ​​are normal, the thermal power fluctuates between 9.1-9.3kw, and the electric power fluctuates between 3.1-3.2kw!"

"Accelerate, increase the intensity of the magnetic field, and adjust the parameters. This time the experimental index is set to 20 times. Pay attention to safety."

"The magnetic field has been adjusted in place!"

"The thermal power is climbing rapidly, and the electrical power is also climbing in tandem."

"Check whether the cooling system is normal, and pay attention to the radiation intensity inside and outside the field!"

"The heat dissipation system is normal, and the radiation intensity is normal."

"At present, it is 100 times faster, and the heat dissipation system is still working normally, but the conversion rate of thermoelectric materials has dropped slightly, about
0.5% ”

"Record it first and continue the experiment!"

"200 times faster, the thermal power is 92.2kw, the electric power is 31.5kw, and the fluctuation range does not exceed 0.1%!"

"Observation Persistence"

"Observing Material Stability"

"Test the core catcher!"

The experiment has been going well so far, and many researchers in non-frontline positions have begun to fantasize about meritorious deeds and rewards
How long has it been? Brother Wei Mingli and other persons in charge who joined earlier have successfully selected the Yangtze River Scholars, which can be regarded as stepping into the middle and upper levels of the scientific research pyramid; and although Liu Yihang joined a little late, he was not selected. , but he successfully became an associate professor at the University of Chemical Technology, which solved a worry about getting married.

Although he is making a lot of money now, who made his girlfriend from Ludi? In the eyes of others, if you don’t have a career establishment, it’s the same as a temporary worker with no serious job. He works seriously and is a serious person.

Where do you think people should go to reason?
Fortunately, with the right boss, none of these are problems.

These are still benefits that can be seen, and there are even more benefits that cannot be seen. First of all, after publishing a JACS, not only in the capital, no matter where you go, you can easily obtain the title of associate teacher , and the resources and support that can be obtained, even those PhDs who have returned from studying abroad, are definitely not comparable. After all, this is a big guy who can make achievements.

Especially in the theoretical research of electrochemistry, they can be said to be at the forefront. Many foreign universities even offer an annual salary of 60 US dollars to recruit them. The salary is so high, let alone other things. , who doesn't know Yankees are rich?
But with the exception of a very few people, no one else left. After all, if you can get similar treatment at home, who would want to cross the ocean and go to a place where you are not familiar with?

Moreover, not only the salary of the Beijing Lithium Battery Research Institute is very good, but also the benefits are very high. Naturally, various bonuses are not mentioned, especially the promise of housing distribution after two years. The house is a unit too.

Especially after the 15-year server is full, the agreement that the house under one's own name will belong to oneself is even more unbearable to call out, even if it is a house here, it is definitely not what young people like them think.

This is probably the reward and support from the national level. After all, this is a contribution to the country that is visible to the naked eye, and it is such a big contribution. How much coal and oil and gas will be saved for the country every year? But it's all green money!

So it is really love to divide the house!

Although Liu Yihang didn't make the evaluation this time, he was not in a hurry. Let alone other things, this kind of military-level confidential project is definitely more than enough to evaluate a Yangtze River scholar, although it is not this time.

Although the influence of one's own boss can be said to be quite large, the activities still need to be carried out.

This was already known from senior brother Wei, several of his mentors had some activities with Wang Feng before sending him up.

Of course, although this is not possible for the time being, other things are still fine. For example, although Yanda and Mizuki’s teaching positions are definitely not good, other things are still relatively easy to talk about, such as the University of Chemical Technology, which has a close cooperation with them.

After all, Liu Yihang is a scholar who has made achievements and has published many top journals. Such a person will definitely sell his face, and he will not suffer.

After all, in the eyes of Chinese people, no matter how good a private enterprise is, it is not as powerful as a state-owned enterprise or a public institution. It is best to be an administrative unit, that is, an administrative establishment. This is good, and it can be regarded as a serious job.

In particular, Yihang's girlfriend is from Ludi, which is the most important thing. Wang Feng can be regarded as helping the people under him to solve a hidden danger. In addition, he has a house and a car, basically there should be no major problems.

After a while, when you are not so busy, you can think about the wedding.

Wang Feng will not treat his own people badly, especially those who are obedient and have made achievements. As long as they dare to do it, Wang Feng will give them bonuses, cars and houses.

(End of this chapter)