Accession Number:

AD0707427

Title:

CLOUD CHEMISTRY OF FALLOUT FORMATION

Descriptive Note:

Final rept.

Corporate Author:

GULF GENERAL ATOMIC CO SAN DIEGO CA

Personal Author(s):

Report Date:

1970-02-15

Pagination or Media Count:

67.0

Abstract:

In initial studies of short-lived fission products for use in fallout fractionation models, several known isotopes have been recognized. The observed gamma ray intensities of recognized energies from the double-tape recoil-range measuring system are consistent with expected recoil range variations. It is planned to satisfy a requirement for more intense gamma spectra by moving the recoil fission product source close to the reactor. The interaction between condensation phenomena, gas, and condensed-phase diffusion of fission products during fallout formation has been investigated analytically. Regions of importance of each of these phenomena have been discussed. Further tests of the application of the compensation law to condensed-state diffusion data have been carried out. The compensation law applied well to all silicate systems except those loaded by fission-product recoil. The thermodynamics of GeO2g have been measured. Attempts to define the stabilities of AsO2g and SnO2g have failed because of low stability of these species. Gaseous release of iodine from TeO2 particles has been shown to be controlled by diffusion in the TeO2. Rates of diffusion have been determined. These data indicate that the volatility of iodine from fallout particles could be very high. Leaching studies of recoil loaded fission products are consistent with release of these fission products to the aqueous leaching solution being diffusion controlled. These measurements point out the importance of the distributions of fission products in fallout particles to their biological activities.

Subject Categories:

  • Radioactivity, Radioactive Wastes and Fission Products

Distribution Statement:

APPROVED FOR PUBLIC RELEASE