Underwater detectors 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. They are supplied in two different configurations:
This product is specifically designed to be compatible with Euratom requirements.
ANTECH N2108 Neutron Underwater Coincidence Counters (UWCC’s) are used to measure neutron radiation activity from
spent MOX (Mixed Oxide) fuel assemblies. The detector head is designed with the flexibility to measure either PWR or BWR
fuel assembly geometries. The detector is supplied with either a PWR or BWR buffer plate, as appropriate, which enables the fuel assemblies to be positioned centrally within the tines of the detector head. Each tine is clad with a cadmium absorber to enclose the 3He detectors and enhance its capability to detect fast neutrons. The detectors are designed to be portable and easy to assemble to facilitate transportation between sites and quick set-up to conduct measurements.
Detector efficiencies of 2-4% (typical) are attainable dependent on the detector type and geometry.
Each system consists of a detector head with integral electronics, a set of connection pipes with associated interconnect clamps, O-ring seals, interconnect cables, a mechanism for attaching the detector assembly to the pond gantry side rails and an OR Box, which combines two input signals from the four detectors in each tine of the fork of the detector head into a single output signal, that is ultimately fed into counting electronics such as an ANTECH N2000 Universal Neutron Counter, ANTECH N2000-2 Unattended Monitor, MicroMesskanal or JSR 15.
Each detector is performance tested with nuclear sources and supplied with full documentation and test records including a leak test report, Certificate of Conformance and manufacturers test records for preamplifier and 3He tubes.