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Neutron External Dose - doe-hdbk-1113-98_reaffirm_2005_040071
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Radiological Safety Trainign for Uranium Facilities
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External Dose Reduction and Control Techniques - doe-hdbk-1113-98_reaffirm_2005_040073


DOE-HDBK-1113-98
Module 103 External Dose Control
Lesson Plan
Instructor's Notes
Gamma radiation from uranium is normally not the
controlling problem. For example, the contact beta
radiation field from depleted uranium is
approximately 240 millirem per hour, while the
contact gamma radiation field is less than 10
millirem per hour. However, significant gamma
fields can exist in areas where large quantities of
uranium are stored, such as a storage area for
uranium contaminated soil. The accuracy and
precision of survey instruments used for
measurement of beta radiation fields depend on
many factors which must be addressed, such as
energy response and geometry factors. Accordingly,
these surveys are typically conducted by
Radiological Control personnel. Neutron fields from
enriched uranium fluoride compounds can also add
to this area of concern. Depending on the magnitude
of neutron fields generated, periodic neutron dose
rate measurements are made, typically by
Discuss the facility specific
Radiological Control personnel.
methods for measuring
external exposure and dose.
Personnel dosimeters produce the data which
becomes the formal or "legal" record of personnel
exposure, thermoluminescent dosimeters, used in
most DOE uranium facilities, provides the most
accurate and precise means of measuring doses
received by workers.
36


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