Nuclear/Radiation

Radiation-hardened LVDTs for nuclear, defense, and aerospace

Beijing ABEK Sensors Technology Co., Ltd(ABEK SENSORS) designs and manufactures position sensors for use in harsh environments where nuclear radiation exposure exists. ABEK SENSORS' LVDTs are capable of withstanding total integral fluxes of up to 1000kGy γ-rays and are ideally suited for critical positional measurements in nuclear reactors, particle gas pedals, proton gas pedals, nuclear power plants, defense applications, submarines and space.

The most common applications for Abek sensors radiation-hardened LVDTs include measuring the position and size of nuclear fuel rods, nuclear-grade valve position feedback, particle accelerator collimators, nuclear submarines, space lenses, and superconducting actuators.

ABEK SENSORS provides extreme environment position measurement solutions for several national large scientific installations, such as nuclear radiation tolerant displacement measurements for the China Scattered Neutron Source (CSNS), vacuum, cryogenic -210°C environment displacement measurements for the Shanghai Synchrotron Radiation Light Source (SSRF), and high precision nuclear radiation tolerant displacement sensors for the High Energy Synchrotron Radiation Light Source (HEPS).

Applications

Spent fuel rod size detection
Nuclear-grade valve position feedback
Nuclear fuel assembly poolside inspection
particle accelerator
Proton accelerator
Nuclear fuel element deformation detection
Nuclear reactor shell monitoring

Benefits

Radiation resistance: 100kGy, 500kGy, 1000kGy
High temperature to 500°C
High reliability
High pressure 30MPa
Strong radiation 1 G Gy
Resistant to neutron radiation 10^21 NVT

Radiation knowledge

Total integral neutron flux
The total integrated neutron flux (also known as neutron flux) is the neutron flux integrated over time

Neutron flux: The total distance traveled by all neutrons in a unit of time and volume

Neutron flux formula: number of neutrons / volume x distance / time = neutron density x velocity

Neutron density: the number of neutrons per unit volume (n)

Total Integral Neutron Flux Formula: Neutron Density x Velocity x Time = Neutron Density x Distance
Total Integral Neutron Flux Units:
n/mxm=n/m(n: number of neutrons: m: m) or NVT(n/cm)

Conversion: 1NVT = 10^4 n/m2

Total integrated dose (TID) radiation of γ rays
The absorbed dose of ionizing radiation is the amount of energy deposited per unit mass.
Unit: rad (Absorbed Radiation Dose): 0.01 joule of energy per kilogram of material will be deposited of radiation Gy (Gray): Radiation per kilogram of energy of 1 joule energy will be deposited (SI units) Conversion: 1Gy = 100 Rad