Working in Confined Spaces

DOE-HDBK-1002-96

5.5 Working in Confined Spaces

Instruction should be provided that will enable the trainee to:

Define confined space

State pre-entry requirements

Describe responsibilities of the following personnel

shift supervisor/manager

industrial safety engineer

operations supervisor

operator

Describe procedural requirements for controlling confined space access

isolating, draining, and flushing space prior to entry

ventilating space prior to personnel entry

testing atmosphere for oxygen concentration

testing atmosphere for explosive gas concentration

testing atmosphere for toxic gases

testing confined space for toxic contaminants

clearing internal obstructions (to prevent fouling safety lines)

identifying and correcting other hazards (e.g., slippery surfaces)

installing temporary lighting

using the "buddy" system

maintaining visual and verbal contact with outside personnel

Identify the tools and equipment that may not be used in confined spaces

Explain personal and personnel accountability

Describe the physiological effects of working in high temperature and high humidity

environments

Explain the use of safety equipment that may be used in confined spaces,

emphasizing unique applications (e.g., special clothing, ice vests)

Explain methods of monitoring temporary ventilation equipment

Explain the danger of inert gases, such as nitrogen and argon, in confined spaces

Explain the danger of toxic hazardous gases.