Contamination Control - hdbk1132990058

DOE-HDBK-1132-99

Operation and maintenance of special facilities may lead to situations (e.g.,

accidents, special maintenance, spill recovery) where air-supplied respiratory

protection is required. ANSI Z88.2, Respiratory Protection, and 29 CFR

1910.134, Occupational Safety and Health Standards, provide guidance for the

design of breathing air supply systems.

1.3.4

Contamination Control . Use of devices to warn personnel of possible

radioactive or other hazardous contamination should be evaluated and provided

in accordance with the evaluation. Personnel monitoring devices, such as hand

and foot counters, should be provided in the vicinity of workstations. Installed

monitors (supplemented with personal monitoring methods) should be used to

monitor personnel exiting an operating area. Continuous air monitors (CAMs)

should be used to detect and alarm at prescribed airborne radioactivity levels.

ANSI N13.4, American National Standard for the Specification of Portable X- or

Gamma-Radiation Survey Instruments, provides guidance on personnel

monitoring devices.

Facility design should locate personnel decontamination facilities close to areas

that represent potential contamination sources. Decontamination facilities

should be designed to minimize the inadvertent spread of contamination during

personnel decontamination activities.

Change rooms should be provided for changing into and from protective

clothing. These areas should be separate for male and female workers and be

located adjacent to shower facilities. Change rooms should be designed to

segregate clean clothing (e.g., personal clothing) and protective clothing.

Storage of contaminated protective clothing should be controlled so that

contamination does not spread. Change room exhaust air should be HEPA

filtered if dispersible radionuclides are handled in the process areas it serves.

Radiation Monitoring . In the presence of ionizing radiation (due to process

1.3.5

material, equipment, or operations), an area radiation monitoring and alarm

system is used to alert personnel of unexpected increases in ionizing radiation

levels. Warning and alarm systems should be designed, installed, and tested to

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