GAMMA-INDUCED SENSITIVITY LOSS IN THE PROPORTIONAL COUNTERS OF A NUCLEAR POWER PLANT,

Abstract

CONCLUSIONS: Sensitivity of both the B-10 lined and BF3 filled proportional counters depends strongly upon the gamma flux intensity in which the detector is operating. Loss of sensitivity occurs because of a reduction in pulse height as gamma flux increases. Pulses produced by neutrons and by gamma rays are both reduced in height; therefore, a low discriminator bias may be used to minimize sensitivity loss without counting gamma pulses. Magnitude of the sensitivity loss was approximately the same for B-10 lined and BF3 filled detector types. Characteristics of the voltage plateau change dramatically with a change in gamma flux. Upper and lowe1 ends of the voltage plateau shift to higher voltages as the gamma flux is increased. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1966
Accession Number
AD0634621

Entities

People

  • James K. Mcnally

Tags

DTIC Thesaurus Topics

  • Counters
  • Detectors
  • Discriminators
  • Gamma Rays
  • Intensity
  • Nuclear Power Plants
  • Proportional Counters
  • Sensitivity
  • United States Military Academy

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Electrochemical Engineering/ Fuel Cell Technologies
  • Nuclear and Radiation Engineering.