Design and Stress Analysis of Extraterrestrial ... - The Black Vault

Figure 2.5e shows the same design procedure for connecting
two parts of three-layer shells. In this construction the middle
split collar 1 is held by the flanges of split collar 2.
The working fluid must be fed into and drained from the reactor
housing. Figure 2.6a is a sketch of a supply pipe for, moderate
pressures (not exceeding 50 daN/cm 2). The power housing 1 has
openings which connect the cavity of tank 3 with the intershell
space. These openings are made before soldering shells 1 and 2.
The working medium is fed along pipe 4 which is flattened here.
If the pressure of the working fluid exceeds 50 daN/cm2 (Fig. 2.6b),
the branch pipe and tanks must be stronger. The internal shell 2
in the section located opposite the openings in housing 1 is
reinforced. Tank 3 and pipe 4 have a circular cross section; this
design is typical for gas reactors.
In some cases, the reactor core is installed as an independent
unit. The core is fully assembled on the pipe panel of the reactor.
Figure 2.6c shows one of the possible designs of such a pipe panel.
The pipe panel 1 is installed before the support to the bead on the
reactor flange and is held motionless by an elastic ring 2 which is
attached by screws 3 and wire 4. The seam 5 is made after the
core is installed.
Usually reactor construction is all-welded; thereiore, the
location of the weld seams must agree with the sequence of its
assembly. The last seam on the diagram in Fig. 2.6d can only be
seam 5. This diagram enumerates the most probable sequence cf weld
seams.
Construction of the fuel element for a fast
neutron reactor
In some cases, for engineering reasons, a fuel element can be
mounted unassembled. Figure 2.7a shows a design which allows the
installation and removal of a fuel element.
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