Piping Containing Radioactive Materials

DOE-HDBK-1132-99

where a conventional piping arrangement would result in excessive

pressure drop in the system;

where the economics favor the expansion joint over a conventional piping

arrangement;

to compensate for differential expansion of a pipe within a pipe or at flued

heads.

1.3.8

Piping Containing Radioactive Materials . The routing of piping containing

radioactive materials should consider the reduction of exposure levels to ALARA.

Piping that contains radioactive materials should not be routed through

corridors. If necessary, shielding should be provided for the entire

exposed run.

Piping that contains radioactive materials should be routed close to the

floor, along walls, and away from the normal access areas to facilitate

cleanup in case of failure.

Equipment or components in the room may be used as a shield. Piping

that contains low or moderately radioactive material can be used to shield

piping that contains highly radioactive material.

Shielded pipe chases or trenches should be used wherever possible.

Multiple blockouts may be used for piping containing low or moderately

radioactive material. It is recommended that piping containing highly

radioactive material should have individual pipe penetrations.

Pipe penetrations should be located so that no direct lines of sight exist

from any source of radiation in a compartment to personnel in an

adjacent compartment or corridor.

II-14