Neutrons are emitted by the decay of Special Nuclear Materials (SNM) and transuranic elements. Neutron measurement is the process of counting the neutrons emitted in nuclear fission. It is normally used to quantify uranium and plutonium. It is a sensitive technique that can be used to measure large or small quantities.
The neutron measurement process can be passive or active. In PASSIVE measurement neutron emissions from the sample are measured by the detector and counting system. In ACTIVE measurement the sample is interrogated with neutrons from a neutron source or a neutron generator. The neutrons emitted from this induced fission are measured by the detector and counting system.
ANTECH neutron counting electronics record the three different rates of neutron emission.
- Singles: the total neutron count rate arising from a sample (neutron totals counting)
- Pairs: the rate of emission of two neutrons in coincidence (neutron coincidence counting)
- Triples: the rate of emission of three neutrons in coincidence (neutron multiplicity counting)
ANTECH neutron instruments employ neutron detectors including fission chambers, boron proportional counters and helium-3 (He3) detectors.
The ANTECH Universal Neutron Counter N2000 has been designed to provide a state of the art neutron counting capability for nuclear safeguards, waste assay and accounting measurements for special nuclear materials.
The ANTECH Model N2442 Active Well Coincidence Counter (AWCC) is a transportable high efficiency neutron counter for the measurement of plutonium and uranium.
The ANTECH N2240 Series are enhanced efficiency active-passive neutron counters for the measurement of plutonium and uranium in nuclear waste.
The ANTECH N2940-2552 Active-Passive Crate Counter is an enhanced efficiency active/passive neutron counter designed for the measurement of plutonium and uranium in nuclear wastes contained in a variety of crates and waste boxes.
The ANTECH N1081 De-Randomising Mixer Buffer provides useful test and diagnostic information for multi-counting chain neutron detectors by determining independent software readable neutron totals counting for each input counting chain and statistical data analysis for each counting channel.
The N2024-220 Decommissioning Piece Monitor is a transportable efficient neutron assay instrument for the monitoring of intermediate level Plutonium Contaminated Material (PCM) waste arising from decommissioning operations.
The ANTECH N2223-220 High Efficiency Passive Neutron Drum Monitor a high detection efficiency measurement system for the determination of plutonium mass in intermediate, transuranic or low level waste using passive neutron total coincidence or multiplicity counting, with a high detection efficiency.
The ANTECH Model N2018 High-Level Neutron Coincidence Counter is a medium efficiency passive neutron counter for measuring the spontaneous and induced fission from the even isotopes of plutonium bearing samples, including PuO2, mixed oxides, metal carbides, solution and scrap.
The ANTECH N2023-M Neutron Coincidence Collar (NCC), similar in specification to the ANTECH N2044 Neutron Coincidence Collar (NCC), is used by safeguards inspectors to verify the fissile material content of fresh BWR nuclear fuel assemblies.
The ANTECH N1003 Series Neutron Time Correlation Analyser (TCA) is a comprehensive multiplicity counter for the passive neutron analysis of plutonium.
N2108 Neutron Under Water Coincidence Counters (UWCCs) are routinely used as inspection tools, for safeguards purposes and to conduct non-destructive measurements to determine the radiation from reactor pond fuel rod assemblies whilst stored underwater.
N2106 Neutron Under Water Coincidence Counters are routinely used as inspection tools, for safeguards purposes and to conduct non-destructive measurements to determine the radiation from reactor pond fuel rod assemblies whilst stored underwater.
The N2920-2550 Passive Neutron Crate Counter is used for the determination of the Pu-240 mass in transuranic (TRU) waste transport containers.
The ANTECH N2221-220 Passive Neutron Drum Monitor is a comprehensive measurement system for the determination of plutonium mass in intermediate, transuranic or low level waste using passive neutron total coincidence or multiplicity counting.
The N2004 Passive Neutron Slab Counter & Curium Monitor is a simple, non-quantitative neutron slab counter for the detection of curium contamination in waste drums, boxes or crates.
The ANTECH Model N2098 Plutonium Scrap Multiplicity Counter is a high efficiency passive neutron counter for measuring the multiplicity of neutron emissions from the spontaneous fission and induced fission of plutonium bearing samples of scrap and residues.
The N2072 Passive Neutron Decommissioning Piece Monitor is a high efficiency passive neutron counter designed for the measurement of plutonium contaminated size reduced pieces arising from the decommissioning of nuclear plant and equipment.