Natural boron element (B) has two stable isotopes, namely 10B and 11B, with natural abundances (the natural occurrence ratio of isotopes in nature) of 19.78% and 80.22%, respectively. 10B has a unique characteristic of high neutron absorption. Its absorption cross section for thermal neutrons is 3837b (an area unit, used to indicate the size of the nuclear reaction cross section. 1b is equal to 10 to the 24th power square centimeter). The absorption cross section for thermal neutrons by naturally abundant boron is close to 750b, while 11B is only 0.005b. Therefore, the absorption cross section for thermal neutrons by 10B is more than 5 times that of naturally abundant boron, more than 20 times that of graphite, and more than 500 times that of traditional protective material concrete.

    Boric acid was originally used as a coolant in pressurized water reactors, that is, as a chemical control agent for long-term control of nuclear reaction rates in the reactor cooling circuit. As a substance with a large neutron absorption cross section, enriched 10B is made into a control box in the form of boric acid to control the speed of the nuclear reactor, making it stable and safe to operate. Compared with naturally abundant boric acid, enriched 10B can achieve a higher level of nuclear reaction operation control. Moreover, it is made of control rods with elements such as lithium and chromium, which play an emergency and protective role for the reactor. In addition, the application of protective materials for reactors in the form of elemental boron, boron carbide, or aluminum borate can greatly improve the operating conditions of nuclear fuel.

Boric acid is commonly used as a neutron absorber in nuclear power. The chemical formula of boric acid is H3BO3, which contains 10 boron atoms and 13 hydrogen atoms. The isotope of boron, boron-10, has a high neutron absorption cross section, so boric acid can absorb neutrons, thereby slowing or preventing the flow of neutrons.
In nuclear reactors, the main role of boric acid is to control the neutron flux and power of the reactor. When the neutron flux in the reactor is too high, boric acid can absorb neutrons, thereby slowing down the reaction rate and controlling the power of the reactor. In addition, in nuclear power plant accidents, boric acid is also used as an emergency control measure to avoid runaway nuclear reactors.
In summary, boric acid plays an important role in neutron absorption in nuclear power, used to control the neutron flux and power of the reactor, as well as to control reactor runaway in emergency situations.

Please store in a cool and dry place and avoid direct sunlight

quality guarantee period：

12 months,Long term storage if storage conditions are appropriate

Emergency measures after excessive contact with boric acid

1. Skin contact: Take off the contaminated clothes and wash thoroughly with plenty of flowing water.
2. Eye contact: lift the eyelids and wash them thoroughly with flowing clean water or normal saline.
3. Inhalation: leave the site to a place with fresh air. If breathing is difficult, give oxygen in time.
4. Ingestion: drink plenty of warm water to induce vomiting, gastric lavage and excretion.