Error analyses on three methods for experimentally obtaining gap conductance values Page: 1 of 4
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:
ERROR ANALYSES ON THREE METHODS FOR EXPERIMENTALLY OBTAINING GAP
CONDUCTANCE VALUES* . Eo
E.n ". Trma and M.eue E. Welofls
nporored byteUnited Stair, Getetomen' deiher
the United StaGe. nt i t United Sttat ner
Ite-eth and beetoyntent Adtninration nor any of
ien etipto d. nt any of their ti ih t ti t e,.
w e lyb y a st ot n t tth eir dn t h ie e. 5 ' - e .
bcienty od tii -hnibtiy zet tiei nata rey.uts neetnne e
on oefutne of anY litrmoron. appa- I.. prod-cror
E. L . Tolman and M. E. Wel1s peooonto caled.utreea tleat te
Gap conductance is a significant factor affecting the stored energy
in a fuel rod at the beginning of a hypothetical accident sequence, as
well as the thermal and mechanical response of the fuel rod during the
accident. Additional well-characterized experimental results are needed
to evaluate and improve the current analytical models used to calculate
gap conductance during steady-state and transient reactor conditions. The
basic difficulty in obtaining the needed data is the inherent uncertainty
existing in any experimental method used to determine gap conductance
information. This paper reports the results of error analyses made on
three experimental methods and compares their relative uncertainties.
The uncertainties associated with the analytical techniques and the
calculational models, as well as with the experimental measurements during
a test, were estimated for each method. The total certainty for a
particular method was then determined using a linear error propagation
technique based on these estimations. Table I summarizes the results of
this procedure for the three methods considered. M IZ i~
In Method I, gap conductance is inferred from the fuel rod power
and the calculated fuel surface temperature. The required fuel surface
temperature is calculated from the experimental measurement of fuel center-
line temperature using the integral of thermal conductivity with respect
to temperature, fkdT(1). Most of the uncertainty in this method is due to
the large statistical spread in experimentally obtained values of thermal
conductivity at the high central fuel temperatures.
* This work was performed for the Energy Research and Development
Administration, Idaho Operations Office under Contract AT (10-1)-1375.
DIS-RIBUTION OF THIS DOCUMENT IS UNLIMITED
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.
Tolman, E. L. & Wells, M. E. Error analyses on three methods for experimentally obtaining gap conductance values, article, January 1, 1975; Idaho Falls, Idaho. (https://digital.library.unt.edu/ark:/67531/metadc867375/m1/1/: accessed March 29, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.