Release of Materials - doe-hdbk-1106-97

DOE-HDBK-1106-97

APPENDIX D

Lesson Plan

Instructor's Notes

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.

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