Table 1-5 Neutrons - hdbk-1130-98

DOE-HDBK-1130-98

Module 1: Radiological Fundamentals

Instructor's Notes

Sources

(Insert facility-specific information.)

Table 1-5

Neutrons

Physical

Characteristics

No charge.

Has mass.

Range in air is very far.

Range

Easily can go several hundred feet.

High penetrating power due to lack of charge

(difficult to stop).

Water.

Shielding

Concrete.

Plastic (high hydrogen content).

Whole body exposure.

Biological

The hazard is generally external.

Hazard

Insert facility-specific information.

Sources

Units of Measure for Radiation

1. Roentgen (R)

a. Is a unit for measuring external exposure.

b. Defined only for effect on air.

c. Applies only to gamma and X rays.

d. Does not relate biological effects of radiation to the human

body.

e. 1 R (Roentgen) = 1000 milliroentgen (mR).

EO7 Identify the units used

to measure radiation.

2. Rad (Radiation absorbed dose)

a. A unit for measuring absorbed dose in any material.

Absorbed dose results from

energy being deposited by

the radiation.