Portable neutron survey meter - NSN3
Ref: NSN3
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Radiation survey meter, also known as neutron survey meter, are essential measuring instruments. They are used for the rapid detection of contamination and for monitoring neutron radiation. These devices are used in a variety of situations: before field operations, when handling objects in a specific area, and for locating hot spots.
BrochureDownload the brochure and discover the NSN3 survey meter: a portable solution ideal for precise neutron detection in nuclear environments.
In accordance with ICRP* recommendations, radiation survey meters have several uses:
These instruments for neutron monitoring are essential before any intervention in the field, before handling objects in specific spaces, and when searching for hot spots.
This neutron dose rate probe complements operational dosimetry, which requires personal electronic dosimeters for worker protection and safety. *ICRP(International Commission on Radiation Protection)
The major innovation in FUJI Electric neutron probes is the use of an organic gas mixture of methane and nitrogen instead of 3He or BF3.
Fast neutrons are detected by the elastic diffusion reaction of hydrogen from methane.
Slow, thermal neutrons are detected using the 14N (n,p) 14C reaction of nitrogen. The proton energy in this reaction is 626 keV.
With these two reactions, measurement of the ambient neutron dose equivalent can be obtained from 0.025 eV up to 15 MeV.
This unique, patented technology, the fruit of Fuji Electric R&D, enables high sensitivity to be achieved with a minimum of moderator, in an ultra-light, easy-to-handle neutron detector.
To optimize safety and efficiency during operations in nuclear environments, the use of appropriate equipment is essential. Thanks to its portability and light weight of 3.5 kg, the NSN3 radiation meter remains easy to transport for daily monitoring and radiation protection operations. Its new design and reinforced housing also improve its durability in the field. Whether inside the reactor building during scheduled maintenance or on containers transporting spent fuel before they are shipped to reprocessing plants, this instrument is indispensable.
The NSN3 neutron detector stands out for its design, which promotes adaptability in the field. Powered by six AA alkaline batteries, the NSN3 radiation meter offers up to 40 hours of battery life when the LCD screen is off. This battery life facilitates extended measurement campaigns and daily on-site operations.
Its color display with a wide viewing angle and intuitive interface make it easy to view measurements and operate the device directly in the field. In accordance with the ALARA (As Low As Reasonably Achievable) principle, the NSN3 neutron radiometer ensures maximum protection for personnel while guaranteeing the reliability and accuracy of the measured data.
The NSN3 portable radiometer allows you to save measurements and their timestamps directly to its internal memory.
The recorded data can then be transferred to a computer via the USB connection, making it easier to analyze and archive the data after measurement campaigns.
The high radiation sensitivity of the portable radiation survey meter provides reliable, accurate measurements across the energy range from thermal neutrons (0.025 eV) to fast neutrons (15 MeV).
It features excellent gamma rejection.
These performances are comparable to those of a transportable neutron detection device (with heavy moderator).
The dose rate measurement range extends from 1 μSv/h to 99.99 mSv/hr with an accuracy of ≤ ±20% at 10 μSv/h.
The dose measurement range extends from 0.1 μSv to 99.99 mSv with an accuracy of ≤ ±20% at 1 μSv.
Trust your measurements: the NSN3 radiation meter is certified by the Technical Center for the Certification of Radiation Protection Instrumentation (CTHIR) in accordance with the IEC 61000-5:2014 standard.
The neutron dose rate sensor has a USB connection that allows the measurements and timestamps stored in the device's memory to be transferred to a computer.
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