3. DESCRIPTION OF PROBLEM OR FUNCTION
BUCKLE is a one-dimensional
computer code compiled to calculate the change in ovality, of an
initially oval, closed-end finite length tube, as a function of
time, temperature, neutron flux and uniform external pressure.
The basic concept employed in BUCKLE is that a tube, which is
slightly out-of-round, tends to become more out-of-round with time
when subjected to net uniform external pressure. The timewise
change in ovality occurs as a consequence of creep deformations
arising from tangential compressive and tangential bending
stresses produced by uniform external pressures acting on an
initially oval tube.