Accession Number:

AD0285237

Title:

FLAME HEATED THERMIONIC CONVERTER RESEARCH

Descriptive Note:

Quarterly rept. no. 4, 1 Apr-30 Jun 1962

Corporate Author:

ATOMICS INTERNATIONAL CANOGA PARK CA

Report Date:

1962-09-28

Pagination or Media Count:

50.0

Abstract:

Thermionic Converter Development Two flameheated diodes were tested. The first diode developed a leak in the Durak-B coated molybdenum thimble after 2 hr of operation. The second did not operate satisfactorily. After disassembly for inspection, the second diode was found to be leaktight and to contain a considerable quantity of unreacted Cs. The interior was shiny. The sapphire spacer which separated the emitter from the collector was shattered. Heat Source Development Ten different designs were tried in order to develop for the demonstration converter a heater with both a reasonable heating efficiency and a reasonable pressure drop at an emitter temperature of about 1400 C and a heat flux of about 20 wsq cm. The best performance previously reported was duplicated. By the use of KT silicon carbide for all components of the demonstration diode heater, the lifetime of the heater was extended indefinitely. A lifetime of 80 hr was run, and the components showed no signs of corrosion or change in performance. Materials Development and Evaluation Data of an experiment designed to measure the rate of permeation of gas through a thin Mo capsule coated with Durak-B, are given. These data indicate that H is essentially the only gas that diffuses through the wall.

Subject Categories:

  • Electric Power Production and Distribution

Distribution Statement:

APPROVED FOR PUBLIC RELEASE