Nuclear Industry

In the nuclear industry, special cables are used, designed for operation at nuclear power plants (NPPs). Such products must meet stringent reliability and safety requirements, ensuring stable operation of the equipment in both normal and emergency modes.
Types of cables for nuclear power plants:
Fire‑resistant power cable PvPGEнг(А)-FRHF is used for transmission and distribution of electrical energy in stationary installations at a rated alternating voltage of 0.66 and 1 kV with a frequency of up to 100 Hz. It is permitted for use in Class 2 NPP systems in accordance with the classification of OPB 88/97 (PNAE G‑01‑011).

The heat‑resistant control cable KZhNKG is designed to transmit signals in the monitoring and control systems of nuclear power plants. It is equipped with copper nickel‑plated conductors and insulation containing glass‑mica, which ensures that it retains its functionality when exposed to an open flame for more than 180 minutes.
Combined information and power cables of the KS series combine power elements for supplying equipment with control conductors for transmitting information and control signals.

Marking of cables for the nuclear industry:
Cables for the nuclear industry are designated by letter indices that reflect their operational characteristics:

NG(A) — non‑flammable version; group laying in category A switching circuits is permitted.
NG(A)-LS is a non‑flammable cable with reduced smoke and gas emission.
NG(A)-FRLS — fire‑resistant version with additional resistance to open flame (Fire Resistance).
NG(A)-HF is a halogen‑free cable (Halogen Free); it does not release aggressive halogen‑containing compounds when burned.
NG(A)-FRHF combines fire resistance and the absence of halogens in the material composition.

All the listed types are designed for group laying of cable lines. Universal cables without additional letter marking are usually intended for single installation.
The main requirements for cables used in nuclear power plants:
Thermal and radiation resistance is the ability to withstand exposure to high temperatures, pressure and humidity fluctuations, as well as ionizing radiation, including in emergency situations.

Chemical resistance refers to the resistance to decontaminating agents (solutions of boric acid, potassium hydroxide, hydrazine hydrate) used in the decontamination of radioactive substances.
Earthquake resistance is the ability to maintain functionality under seismic loads.
Fire safety is the ability to function under fire conditions for at least 180 minutes.
Long service life — the operational lifespan of the cables must be at least 40 years to ensure a high level of safety for the facilities.

The complete list of requirements for cable and conductor products for the nuclear power industry is established by the standard of the state corporation “Rosatom” — STO 1.1.1.01.001.0902-2012.