Explosive Hazard. Class III

DOE-HDBK-XXXX-2005

06/30/2005

EXPLOSIVES HAZARD, CLASS III. Class III consists of those explosives activities

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that represent a low accident potential. Class III includes explosives activities during

storage and operations incidental to storage or removal from storage. [DOE M 440.1-1]

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EXPLOSIVES HAZARD, CLASS IV. Class IV consists of those explosives activities

with insensitive high explosives (IHE) or IHE subassemblies. Although mass detonating,

this explosive type is so insensitive that a negligible probability exists for accidental

initiation or transition from burning to detonation. IHE explosions will be limited to

pressure ruptures of containers heated in a fire. Most processing and storage activities

with IHE and IHE subassemblies are Class IV. However, the following examples of

explosives activities with IHE and IHE subassemblies will remain Class I:

pressing;

some machining (see DOE M 440.1-1, Chapter II, paragraph 12.4.2.c);

dry milling; and

dry screening.

[DOE M 440.1-1]

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EXPOSED (live parts): Capable of being inadvertently touched or approached nearer

than a safe distance by a person. It is applied to parts that are not suitably guarded,

isolated, or insulated. [IEEE 1584-2002] [NFPA 70E] [DOE-HDBK-1092-2004]

EXPOSURE ASSESSMENT (EA). The estimation or determination (qualitative or

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quantitative) of the magnitude, frequency, duration, and route of employee exposure to a

substance, harmful physical agent, ergonomic stress, or harmful biological agent that

poses or may pose a recognized hazard to the health of employees. [DOE O 5480.10A

(Draft)]

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EXPOSURE ASSESSMENT(EA). The systematic collection and analysis of

occupational hazards and exposure determinants such as work tasks; magnitude,

frequency, variability, duration, and route of exposure; and the linkage of the resulting

exposure profiles of individuals and similarly exposed groups for the purposes of risk

management and health surveillance. [DOE G 440.1-3]

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EXTERNAL DOSE OR EXPOSURE. That portion of the dose equivalent received from

radiation sources outside the body (e.g., "external sources"). [10 CFR 835.2]

DRAFT