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

The reflector material 5 (beryllium, beryllium oxide) is packed
into the pressurized shell 4. A segment of boron steel 6, which
exhibits powerful neutron absorbbnce, is set in the lugs to the
internal surface of the shell 4, which occupies approximately i80d.
It must be cooled to prevent overheating. The adjusting cylinder
is turned by spring 8. The journal-thrust bearing 3 and the journal
bearing 7 operate with a dry lubricant or, are lubricated with the
cooling fluid if the cylinder is of such construction.
The housing of the adjusting cylinder 1 is attached so as t?
ensure free thermal deformation of the more highly heated rea,tor
$ housing and the installation is light because of the pin connection.
The locking of the pin is shown in the figure (view B).
One of the possible designs of the adjusting rod in a thermal
reactor (Fig. 2.9b) consists of a controlling cylinder 1, a housing
2, support devices 3, and the rod 4. These elements of the, rod are
made from stainless steel, except for rod 4 which is made from boron
steel.
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Tne adjustment is performed by the moving of the rod into the
core of the reactor using a piston and cylinder; the rod must be
cooled during operation. The coolant is fed to tanks 5.
The working fluid controlling the rod, in this case, is the sime
as the cooling fluid. The housing of the adjustment rod 1 is welded
to the load-bearing plate of the reactor 6 and the support diaphragm
7. The disadvantage of this design is its porosity.
Prctection unit
The protection unit (Fig. 2.10) of the studied reactor has a
mass which sometimes exieeds the mass of the reactor itself. The
protecti rn unit coneists of' a bracing frame 1 which connects the
protection with the reacts. &rnd with other elements of the installation,
load-bearing rings 2, •uaphragms 3, sht.ll:k 4, p~pes 5 for
introducing the jdjust!ir 'od into the reactor. The protective
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