185: Chapter 185 Point Kernel Integration and Monte Carlo Method!

The laboratory was filled with people.

Xu Hao was at the very front, followed by Professor Qian Wenwen and Professor Du Zhongshu.

Standing behind them were many researchers from the Research Institute.

Xu Hao spoke directly.

"I won't waste time with pleasantries; let's get straight to the point."

Hearing this, everyone nodded with serious expressions.

Xu Hao pulled over a nearby blackboard.

"Returning to the problem we encountered a few days ago: how to effectively achieve Biological Shielding for nuclear vessels?"

"In other words, while ensuring the normal operation of the nuclear reactor and stable power output, how can we reduce nuclear radiation to a minimum, or even to zero?"

After Xu Hao finished speaking, he looked around the entire laboratory.

Professor Qian Wenwen frowned and said:

"Engineer Xu, we have tried all currently feasible methods, but the experimental results haven't met our expectations."

"Achieving zero radiation shielding... I'm afraid it will be very difficult!"

Professor Du Zhongshu also nodded in agreement.

Xu Hao nodded.

"Indeed, achieving zero nuclear radiation shielding is a daunting task. Even the USA, which leads the world in nuclear technology, cannot guarantee it one hundred percent."

There was one more thing Xu Hao didn't say:

"There is no method, but I have a new material that can achieve zero nuclear radiation shielding."

Xu Hao didn't plan to say it just yet.

He wanted more to teach the researchers how to conduct research on Biological Shielding for nuclear vessels.

"Let's set that question aside for a moment and go back to a place that is most easily overlooked."

"And that is: how to calculate the Biological Shielding of a nuclear-powered vessel?"

"You must understand that only by knowing the source and intensity of the nuclear radiation can we design a shielding method for it."

Xu Hao looked at everyone and asked.

This question immediately stumped many of the researchers present.

These past few days...

Following Xu Hao's instructions, they had conducted numerous experiments and performed data organization and analysis.

But none of them had thought about this question.

Could it be...

Engineer Xu had them experiment and collect data specifically to calculate the Biological Shielding of the nuclear-powered vessel?

Everyone looked puzzled, their hearts filled with curiosity.

Even Professor Qian Wenwen and Professor Du Zhongshu frowned and lowered their heads in deep thought.

How to calculate the Biological Shielding of a nuclear-powered vessel?

This was something they hadn't considered.

In fact...

Their direction of thought over the past few days hadn't been this at all.

After thinking for a few minutes, neither of them had any clues.

"Engineer Xu, please enlighten us!"

Professor Qian Wenwen spoke with a steady expression, asking humbly.

Although he was much older than Xu Hao and could easily be considered his senior...

But...

In the scientific research community, the one who has mastered the knowledge is the teacher.

Age is not the criterion for judging strength or ability.

Scientific research level and capability are the only standards for measuring a researcher.

Xu Hao's expression became a bit more serious.

"To calculate Biological Shielding, we first need to introduce two methods: the Point Kernel Integration Method and the Monte Carlo Method."

As soon as Xu Hao finished speaking, the cloudy eyes of Professor Qian Wenwen and Professor Du Zhongshu brightened slightly, as if they had thought of something.

Immediately after, their expressions became even more serious as they waited for Xu Hao's explanation.

The group of researchers behind them showed somewhat confused expressions upon hearing these two methods.

Obviously, they had never heard of these two methods.

Only a few balding researchers nodded as if they understood something.

At this moment, the researchers opened their notebooks, took out their pens, and wrote down the two methods Xu Hao mentioned.

Then they looked up and watched Xu Hao intently.

Xu Hao continued his explanation.

"The Point Kernel Integration Method is specifically used for the Gamma Ray radiation shielding design between the main loop equipment of the reactor."

"It mainly employs methods such as the Equivalent Point Source Method, the External Wall Equivalent Dose Rate Method, the Integrated Shadow Shielding Technique, and the Multilayer Shielding Energy Spectrum Attenuation Method."

"However..."

Xu Hao shifted the topic and added:

"When using this method, one must also consider various radiation attenuation factors such as the self-absorption of the radiation source, the angular effect of the source, the buildup effect of slanting through the shielding layer, and scattering effects."

"Its calculation formula is: Dk=∑i=1nCsid2ikBNCbk(SA)mik[∏m=1m-1(OA)m]ik."

"Where: Dk is the dose rate at the kth dose point, n is the total number of equivalent point sources, m is the total number of shadow shields..."

While speaking, Xu Hao wrote the formula for the Point Kernel Integration Method on the blackboard and listed the meaning of each symbol.

The researchers below listened very intently, their eyes unblinking, their hands moving non-stop as they took notes in their books.

Even Professors Qian Wenwen and Professor Du Zhongshu did the same.

Xu Hao continued his lecture:

"Let's talk about the Equivalent Point Source Method: it discretizes the side and top surface sources of the reactor, as well as the Primary Loop piping and equipment coolant volume sources, into equivalent point sources."

"The intensity of the discretized points on the side and top surface sources of the reactor is equal to the product of the source strength at the geometric center of that surface element and the area of that discretized surface source."

"The intensity of the discretized volume sources for the Primary Loop piping and equipment coolant is equal to the product of the source strength at the center of the discretized volume source and the volume and density of the discretized unit."

"This is the Equivalent Point Source Method."

"I have organized the remaining methods on the computer. You can come to me later with a USB drive to copy them."

Hearing this, everyone looked delighted.

"Does everyone understand this Point Integration Method?" Xu Hao asked.

Most of the researchers nodded, while a few others looked lost in thought.

Xu Hao immediately reassured them:

"It's okay if you don't fully understand it yet. You can reinforce it when you go back later, or ask your colleagues."

"Next, we will explain the second method: the Monte Carlo Method."

Xu Hao took a sip of water, cleared his throat, and continued the lecture.

"The Monte Carlo Method, also known as the random sampling or statistical experimental method, is a numerical analysis method..."

Calmly and steadily, he explained the method to everyone, intentionally slowing down when encountering more obscure and difficult parts.

He gave various simple and easy-to-understand examples for analysis and comprehension.

Suddenly, everyone was enlightened and understood the meaning.

Xu Hao was not impatient.

After all, these problems and knowledge points were quite obscure and difficult to grasp.

It was inevitable that it would take more time.

Everyone listened with great interest, nodding at times and frowning at others.

They thought and took notes while listening to the lecture.

The many researchers and professors in the laboratory had seemingly all become Xu Hao's students.

This was true even for the two Old Professors, Professor Qian Wenwen and Professor Du Zhongshu.

They listened even more intently than the researchers, and their notebooks were already filled with notes.

The researchers in the back weren't surprised either.

The knowledge Engineer Xu was teaching was too cutting-edge.

It was full of substance; every single word was pure essence!

Just as everyone was getting deeply into the lecture, the laboratory door suddenly opened.

The researchers in the front were fine, as their minds were focused on the content of Xu Hao's lecture.

The researchers near the door, however, were startled.

Especially the female researcher sitting across from the door; her body suddenly jerked as if she had been shocked by electricity.

Her pretty face turned pale, and she was full of anger. Pouting her lips, she turned her head huffily to look at the newcomer.

"Ouch, what are you doing?! You scared me!!"