Very High Radiation Area

DOE-HDBK-1130-98

"CAUTION"

"DANGER

HIGH RADIATION AREA"

Additionally the posting may state:

"Personnel Dosimeter, Supplemental Dosimeters,

and RWP Required for Entry"

2.Very High Radiation Area

Very High Radiation Areas will be posted with a standard radiation symbol colored magenta

(or black) on a yellow background, reading:

"GRAVE DANGER,

VERY HIGH RADIATION AREA"

Additionally the posting may state:

"Special Controls Required for Entry"

Some HRAs and VHRAs only exist when machinery is energized, such as radiation

producing devices. For example, a posting could be:

"High Radiation Area When Warning Light is On"

"Controlled Area When Warning Light is Off"

Radiation sources

(Insert facility-specific information on radiation sources that can produce High/Very High

Radiation Areas and the location of each.)

Table 8-1

High and Very High Radiation Area

Definitions and sources (Objectives EO1 and EO2)

Sign

Definition

Sources

Insert HRA sign

> 100 mrem in 1 hour

(Insert facility-specific

sources and locations.)

This is taken at 30 centimeters from the

source of radiation or any surface that the

radiation penetrates.

Insert VHRA sign

> 500 rad in 1 hour

(Insert facility-specific

sources and locations.)

This is taken at 100 centimeters from the

source of radiation, or any surface that the

radiation penetrates.