Warning Devices - hdbk110997

DOE-HDBK-1109-97

Radiological Safety Training for Radiation-Producing (X-Ray) Devices

Instructor=s Guide

Lesson Plan

Instructor=s Notes

- The distance from the target of

the tube to the location under

consideration.

The calculation uses conservative

values and derives a value (K) that

is used with graphs to determine

shield thickness of a given type of

material (e.g., lead or concrete).

WARNING DEVICES

Operators should be aware of the status of the

X-ray tube. Indicators that warn of X-ray

production typically include:

A current meter on the X-ray control panel.

A warning light labeled X-RAYS ON near or

on the control panel.

Warning light labeled X-RAYS ON near any

X-ray room door.

These warning lights or indicators are activated

automatically when power is available for X-ray

production.

For X-ray systems with an open beam in a

shielded room, evacuation warning signals and

signs must be activated at least 20 seconds before

X-ray production can be started. Any person who

is inside the room when warning signals come on

should immediately leave the room and activate

the panic or scram switch on the way out. This is

an emergency system designed to shut down the

X-ray system immediately.