Open-Beam System - hdbk110997

DOE-HDBK-1109-97

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

Instructor=s Guide

Lesson Plan

Instructor=s Notes

Radiation leakage measured at

2 inches (5 cm) from any outer

surface must not exceed

0.25 mrem/hour during normal

operation.

(Add facility-specific examples.)

iii.

Open-Beam System.

According to ANSI N43.2, a device that

does not meet the enclosed-beam standards

is classified as an open-beam system. In an

open-beam system, one or more X-ray

beams are not enclosed, making exposure

of human body parts possible during

normal operation. The open-beam system

is acceptable for use only if an enclosed

beam is impractical because of any of the

following reasons:

A need for frequent changes of

attachments and configurations.

A need for making adjustments

with the X-ray beam energized.

Motion of specimen and detector

over wide angular limits.