WM3400™

Name: Mirion
Price range: $

Passive Neutron Slab Counter

Portable and accurate, the WM3400 Passive Neutron Slab Counter is designed to evaluate plutonium content in 200 L drums by detecting coincidence neutrons — ensuring safe nuclear material management while offering efficient measurement readings.

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Data Sheet

Features

Data Sheet

Designed for passive neutron go/nogo measurement of plutonium in 200 L (55 gal) drums
Easily accessible, front-mounted drum positioner on polyethylene body allows for repeatable, accurate counter alignment
Fast pre-amp electronics with greater performance
Six ³He detectors
Transportable for easier equipment management and flexibility

Description

The WM3400 counter measures the plutonium content in 200 L (55 gal) drums by detecting coincidence neutrons from the spontaneous fission of the even numbered isotopes of plutonium. The counter is designed to make a go/no-go measurement, ensuring safe, efficient nuclear material management. A JSR-15™ Neutron Analysis Shift Register is required for coincidence counting, but not included with the WM3400 counter.

System Setup and Operation

The WM3400 unit is a slab of high-density polyethylene attached to a cart. A drum positioning fixture is attached to the front of the polyethylene slab. The drum is rolled up to the counter and the measurement is made. A shelf on the back of the cart can be used to hold the JSR-15 analyzer, and the cart tabletop is available for a portable computer and printer (not included with WM3400 unit).

Six ³He tubes are placed in the slab of high-density polyethylene. The tubes are arranged in a single row, wired together and connected to one Amplifier/ Discriminator circuit board. The pre-amp is mounted inside a high voltage junction box.

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