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Piping Containing Radioactive Materials
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Design Considerations - index
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Valves - hdbk1132990185


DOE-HDBK-1132-99
Isolation valves should be provided where radioactive material passes
through compartments or rooms.
Piping that contains radioactive material should be routed so that no
direct lines-of-sight exist through doorways or labyrinths.
In occupied areas, wall, ceiling, and floor penetrations should be provided
shielding from piping containing radioactive materials.
Valves requiring frequent operation may be fitted with remote mechanical
reach rods.
Remote valve operators should be located externally to the compartment
housing the valve.
Stagnant or low-point pockets should be avoided in any radioactive piping
system.
Restricting orifices or metering plates in piping systems containing
radioactive materials should be located in vertical runs. They can be
located in horizontal runs if drains are provided on both sides of the
instrument.
The piping system should be designed to preclude solids from settling in
the piping.
Process lines should be free-draining to prevent fluid accumulation in
traps. In cases where low points or traps cannot be prevented by design,
a drain and collection system should be provided at each low point.
Encasement piping should drain into the process pit in which it
terminates.
II-15


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