UCB-NE-108 user's manual Page: 4 of 11
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in the DEC/VAX VMS Operating System.
The input lines are
First Line (in free format)
n0 = isotope initial inventory in the gap, g/m3 [c in (9)]
a = surface area of the gap, m2
v = volume of the gap, ma
1= backill thickness, m
df = diffusion coefficient, m3/a
lambda = decay constant (if < 1, 1/a, or half-life, if > 1, a)
Second Line (in free format)
kl = backfill retardation coeffcient
k2 = rock retardation coefficient
epal = backfill porosity
eps2 = rock porosity
Third Line (in free format)
istep = maximum time to compute, a [tmax=910**(ite)]
weight = isotope initial inventory, g
iplot = generate a plotting file (if =1)
init=0 if fractional release rate is to be normalized to initial inventory
There are two output streams. The first is a tabular output, currently directed to the screen. The second is
a stream of output data, for use by a X-Y plotter or plotting program such as TELL-A-GRAF, if (iplot=l).
The tabular output is currently directed to the screen. In a DEC/VAX computer this output can be directed
to a file by a command such as
ASSIGN filename FOR006
The tabular output prints the time, the mass trader rate and the fractional release rate at the backfill/rock
interface, and the number of terms used in the infinite series computation.
The output for X-Y plotting consists of only time and the fractional release rate in free format.
UCB-NE-108 is written in FORTRAN and does not call any outside libraries. It operates on DEC/VAX/VMS
and DEC/UNIX machines.
VERIFICAION & BENCEMAREING
UCB-NE-108 is an implementation of (11). It was verified through hand calculations. The correctness of
UCB-NE-108 was also checked this way. Eq. (11) was given to several workers and they were asked to write
computer programs independently. The outputs of the various programs are then compared or benchmarked.
They gave identical results.
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Kang, C.H. & Lee, W.W.L. UCB-NE-108 user's manual, report, April 1, 1989; [Berkeley,] California. (https://digital.library.unt.edu/ark:/67531/metadc1108864/m1/4/: accessed March 20, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.