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硼酸在反应堆中的作用是什么?

发布来源:http://www.jinhao360.com    更新时间:2022-11-11 点击数:

对于陶瓷、搪瓷釉料,氧化硼是很好的助熔剂和网络形成体。它可形成玻璃(在低温时),提高坯釉适应性,降低粘度和表面张力,提高折射率,提高机械强度,耐久性耐磨性,它是无铅釉的重要组成。那么您知道硼酸在反应堆中的作用是什么吗?下面氢氧化钾厂家为您解答。
For ceramic and enamel glaze, boron oxide is a good flux and network formation. It can form glass (at low temperature), improve the adaptability of body glaze, reduce viscosity and surface tension, improve refractive index, improve mechanical strength, durability and wear resistance. It is an important component of lead-free glaze. Do you know the role of boric acid in reactor? The potassium hydroxide manufacturer will answer the question for you.
硼酸是一种大中子吸收截面的物质,在反应堆中主要是用来调节反应性用的,加入适量的硼酸可以降低反应性。天然硼元素有两种稳定同位素,即B-10和B-11,丰度分别为1978%和8022%。
Boric acid is a material with large neutron absorption cross section, which is mainly used to adjust the reactivity in the reactor. Adding an appropriate amount of boric acid can reduce the reactivity. There are two stable isotopes of natural boron, namely B-10 and B-11, with the abundances of 1978% and 8022% respectively.
B-10具有对中子高吸收的独特特性,B-10对热中子的吸收截面为3837bar(1b=10,Pa),自然丰度的硼的对热中子的吸收截面接近于750bar,而B-11仅为0005bar,因此B-10对热中子的吸收截面是自然丰度硼的5倍还多,是石墨的20多倍,是传统防护材料混凝土的500多倍。
B-10 has a unique feature of high neutron absorption. The absorption cross section of B-10 for thermal neutrons is 3837bar (1b=10, Pa). The absorption cross section of natural abundance boron for thermal neutrons is close to 750bar, while B-11 is only 0005bar. Therefore, the absorption cross section of B-10 for thermal neutrons is more than 5 times of natural abundance boron, more than 20 times of graphite, and more than 500 times of traditional protective material concrete.
氢氧化钾
就是说,硼-10同位素是高的效的热中子吸收剂。因此在核电站中它是安全和控制系统中所不可缺少的。
In other words, the boron - 10 isotope is a highly effective thermal neutron absorber. Therefore, it is indispensable in the safety and control system of nuclear power plants.
硼酸的用途有哪些?例如,在玻纤生产中经可降低熔融温度从而有助于拉丝。一般来讲,B2O3可以降低粘度、控制热膨胀、阻止失透、提高化学稳定性、提高抗机械冲击和热冲击能力。在要求钠含量较低的玻璃生产中硼酸常常与钠硼酸盐(如五水硼砂或无水硼砂)混合使用以调节玻璃中的钠硼比。
What are the uses of boric acid? For example, in the production of glass fiber, the melting temperature can be lowered to facilitate wire drawing. Generally speaking, B2O3 can reduce viscosity, control thermal expansion, prevent devitrification, improve chemical stability, and improve resistance to mechanical shock and thermal shock. In the production of glass requiring low sodium content, boric acid is often mixed with sodium borate (such as borax pentahydrate or anhydrous borax) to adjust the sodium boron ratio in glass.
硼酸在反应堆中的作用是什么?这个问题我们已经为您解答了,您对此还有什么不明白的地方欢迎随时来我们网站http://www.jinhao360.com进行咨询!
What is the role of boric acid in the reactor? We have answered this question for you. If you have any questions, please come to our website at any time http://www.jinhao360.com Consult!

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