Thermodynamics of the Fuel Fragmentation Gas Page: 3 of 6
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to UNT Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
3
P(n.) = S-1 n exp[-6(an 2/3-kT lnRs)J (5)
where Sn, the normalization constant is a function of the temperature and
volume of the gas, q is a constant,(the "packing" parameter q = 3)2, a*2/3 is
the surface energy, and Rs is the saturation ratio, expressed as the ratio
of the monomer population partial pressure, p1, to the partial pressure
of the polymer population.
(e) For supersaturated conditions (Rs > 1), there is a critical
fragment size, n*, given by the relation
(n* )1/3 = 2a/(3kT In Rs) (6)
Beyond this critical size, n , there is an unstable heterophase transition
whereby the "liquid-phase" grows at the expense of the gas fragment population
until tocal "condensation". Calculations were performed for a 10-g sample
of U02 and a capacitor discharge of 6000 joules. Sonie uF the results are
shown in Table I.
Fragment-"size" distribution functions for the polymer population are
shown in Fig. 1. For increasing monomer partial pressures, p1, the size-
distribution shifts towards larger fragments. For supersaturated conditions
the distribution curve increases beyond the critical size as a result of
the unstable heterophase transition previously mentioned.
Upcoming Pages
Here’s what’s next.
Search Inside
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Perez, R. B. & Alsmiller, R. G., Jr. Thermodynamics of the Fuel Fragmentation Gas, article, January 1, 1977; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1056959/m1/3/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.