Class Ia products are named according to the fuel used.
The first category of Class A products usually refers to nuclear energy equipment, and they are usually named according to the fuel they use, mainly for the following reasons:
1. The core part of the nuclear energy equipment is the nuclear fuel, so naming it by the name of the fuel can intuitively express its core features.
2. Naming by fuel also helps to distinguish different models and specifications of nuclear energy equipment.
3. Naming by fuel facilitates international exchanges and cooperation, because the development direction and technical routes of countries in the field of nuclear energy may be different, but the types of fuel used are often the same.
4. Fuel names are also closely related to the operation and management of nuclear power plants, for example, information on the radioactive characteristics and service life of fuels such as plutonium-239 and uranium-235 is very important for the operation of nuclear power plants.
Class I, Class A products generally refer to high-risk products in medical devices, with the following characteristics:
1, used directly inside the human body or in direct contact with the human body;
2, high risk to human health;
3, extremely high requirements for product performance and quality;
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4, usually requires rigorous clinical trials and audits to obtain marketing authorization.
The first class A products are high-risk products in the regulatory classification of medical devices, which usually refers to those medical device products that are directly used inside the human body or in direct contact with the human body, and which pose a high risk to human health. Examples include pacemakers, artificial heart valves and artificial joints. In China's medical device regulatory regulations, Class I, Level A products need to undergo rigorous audits and clinical trials before they can be marketed and sold.
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