Upgrading a scaler ratemeter into level and thickness nucleonic gauges

Abstract

Abstract

This article presents an upgraded LUDLUM Scaler Ratemeter Model 2200 into a nucleonic thickness and level gauge. A vertical pipe scanning, consisting mediums such as SS-316, sand, wax, polyethylene, oil, water and air (empty) was done at Malaysian Nuclear Agency, Bangi, Selangor in order to obtain a shielding data as well as the corresponding voltage signals at the ratemeter. A simple comparator circuit with reference potentiometers and LED indicators was then designed and fabricated to work as a thickness or level gauge. The reference can be adjusted in accordance to type and thickness of the pipe/ container, the source intensity of X or Gamma ray, diameter of the pipe and also the distance between source and the NaI(Tl) detector. 

Abstrak

Kertas kerja ini membentangkan sistem LUDLUM Scaler Ratemeter Model yang telah dinaik taraf 2200 kepada system pengukuran ketebalan nucleonic dan pengukur tahap. Pengimbasan paip menegak, mengandungi media seperti SS 316, pasir, lilin, politena, minyak, air dan mengudarakan (kosong) telah dibangunkan di Malaysian Nuclear Agency, Bangi, Selangor agar satu data perlindungan serta voltan sepadan memberikan isyarat di ratemeter. Satu litar pembanding mudah dengan rujukan penunjuk-penunjuk potentiometers and LED direka bentuk dan litar-litar ini berfungsi sebagai ketebalan atau pengukur tahap. Rujukan akan dapat diselaraskan mengikut jenis dan ketebalan paip / bekas, keamatan sumber X atau sinar Gamma, garis pusat paip dan juga jarak antara sumber dan NaI(Tl) pengesan.