NIOSHTIC-2 Publications Search

Precision Tests of Neutron Sulfur Meter in Coal Preparation Plant.

Hall AW; Martin JW; Stewart RF; Poston AM
NTIS: PB 242 122 :12 pages
A neutron meter was developed for monitoring the sulfur content of coal streams. Neutrons from 80 micrograms of californium-252 penetrate the coal, producing thermal neutrons that are captured by atoms of elements present in the coal. The excited atoms emit prompt gamma rays with energies characteristic of the capturing element. These gamma rays are detected with a 6- by 7-inch sodium iodide detector and processed by electronic equipment to produce a gamma ray energy spectrum of the elements. Tests of the meter at a commercial coal preparation plant showed that sulfur in moving coal can be determined to a precision of 0.05 percent sulfur within 2 minutes. Based on this report by the Bureau of Mines, reliability of the coal-handling system proved inadequate for long-term operation, however, and improvements are planned. Work done in cooperation with U.S. Steel Corp.
Publication Date
Document Type
IH; Report of Investigation;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
RI 8038
Source Name
NTIS: PB 242 122
Page last reviewed: November 26, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division