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|  DOE-HDBK-1106-97
Radiological Contamination Control Training
for Laboratory Research
Instructor's Guide
APPENDIX D
Lesson Plan
Instructor's Notes
I.
RELEASE OF MATERIALS
A.
Monitoring Techniques General
Monitoring techniques for release of materials are
addressed in DOE/CH-9401 (1993). The following
techniques apply for G-M detectors (H-3 cannot be
measured).
1. Surveys should be conducted in a low
background area (background levels are not to
exceed 300 cpm; lower levels are preferable and
in most cases achievable).
2. Direct measurement should be made prior to
smear surveys.
3. Materials or equipment with inaccessible
surface areas should be disassembled for survey
or the inaccessible areas evaluated for
contamination with special survey techniques or
by review of process knowledge.
If potential for internal contamination cannot be
adequately assessed, material may not be
released.
4. An audible response should be utilized as the
principal indicator for initial detection of
surface radioactivity.
D-1
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