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Reducing the Burden of Neutron Monitoring Launch of a New Neutron Survey Meter for Global Markets
Reducing the Burden of Neutron Monitoring Launch of a New Neutron Survey Meter for Global Markets
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October 8,2026
Fuji Electric Co., Ltd.
Fuji Electric Co., Ltd. is pleased to announce that it has released a neutron survey meter for global markets that complies with an international standard and offers high workability and safety.
A new neutron survey meter for global markets
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1. Background
With the spread of AI and digital technologies, demand for electricity is expected to increase even further, spurring growing momentum for the use of nuclear energy to ensure safety from the perspective of decarbonizing energy and ensuring a stable supply of electricity.
Neutron radiation is present at nuclear facilities including nuclear power plants and nuclear research institutes. These facilities use a survey meter to measure the neutron air dose rate* in order to manage worker safety.
Because neutrons move through the air at a wide range of energies, neutron survey meters are required to capture and measure them accurately. These survey meters tend to be heavy due to structural reasons, which has caused issues in terms of safety and the burden on workers.
*The hourly dose of airborne radiation.
2. Product Features
Fuji Electric’s neutron survey meter is lightweight and durable while satisfying the required measurement accuracy. It is also compliant with IEC 61005, an international standard, with a view to global rollout.
1）Using an organic mixed gas detector to reduce the amount of neutron moderator used, achieving a weight reduction of about 50%
Since general neutron survey meters use a detector that only captures low-energy neutrons, the detector is covered with a massive moderator made of a material like polyethylene in order to decelerate fast (high-energy) neutrons so they can be detected.
This product uses an organic mixed gas detector, which is capable of capturing neutrons at a wide range of energies while reducing the amount of moderator used. This has resulted in a weight reduction of about 50% compared to conventional products. It also reduces the burden on workers during measurement as well as the risk of the product falling or toppling during transport and operation.
2）Improved the handle structure for higher durability
The product housing was redesigned to provide support for the handle at two points, rather than just one point as with conventional products. This has made the handle stronger and improved the durability compared to conventional products, reducing the frequency of failures.
3. Main Customers
Nuclear power plants in Japan and overseas, nuclear research institutes, hospitals, etc.
4. Product Specifications
Type of radiation measured
Neutrons (excluding pulsed neutrons)
Range of energy measured
0.025 eV to 15 MeV
Detector
Organic mixed gas counter
Effective measurement range
1 cm dose equivalent rate: 1 μSv/h to 99.999 mSv/h (5 decades)
1 cm dose equivalent: 0.1 μSv to 99.999 mSv (6 decades)
Measurement accuracy
Dose rate measurement: Within ±20% (at 10 μSv/h)
Dose measurement: Within ±20% (at 1 μSv)
Weight
Approx. 3.5 kg
Dimensions
Approx. 165 (W) × 305 (L) × 225 (H) mm
(Excluding the handle and other protrusions)
5. Launch Date
The date of this announcement
6. Product Inquiries
Sales Department III, Social Solution Division, Power Electronics Sales Group, Fuji Electric Co., Ltd.
☎03-5435-7049
Radiation Systems Engineering Department, Radiation Equipment Division, Industry Business Group, Fuji Electric Co., Ltd.
☎042-585-6024
Product Website
https://www.fujielectric.co.jp/products/sensor/radiation/product_detail/servy_nsn.html#nsn3
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Note:
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The information conveyed in this release is accurate as of the date of this announcement and is subject to change without prior notice.
