Accession Number : AD0486831

Title :   STUDY OF BOILING INSTABILITY OF ALKALI METAL AT LOW-HEAT FLUXES.

Descriptive Note : Test rept. 1 Sep 63-1 Apr 64,

Corporate Author : AIR FORCE AERO PROPULSION LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Quigley, R. E., Jr. ; Bane, R. L. ; Delaney, C. L.

Report Date : MAY 1966

Pagination or Media Count : 35

Abstract : This test report presents the results of an in-house experimental investigation to determine the boiling characteristics of an alloy of 22% sodium and 78% potassium NaK(78) at various bulk fluid saturation temperatures. The investigation also included the evaluation and development of artificial nucleation sites that are capable of stabilizing the boiling of an alkali metal. The results of the tests show the capabilities of eight types of artificial nucleation sites that were used to reduce the degree of liquid superheat and vapor-pressure perturbations in the liquid metal refluxing test capsules. These results are compared to the degree of liquid superheat and vapor-pressure perturbations that were experienced in similar test capsules which were not equipped with any type of artificial nucleation site. Two of the eight artificial nucleation sites tested were successful in reducing vapor-pressure perturbations from 28 psid to 1/4 psid and liquid superheat from 200 F to less than 10 F. (Author)

Descriptors :   *POTASSIUM ALLOYS), (*SODIUM ALLOYS, (*NUCLEATE BOILING, ALKALI METALS), VAPOR PRESSURE, HEAT, LIQUID METALS, HEAT TRANSFER, STABILITY, NUCLEAR POWER PLANTS.

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE