Hazard Analysis (HA) - dpstd3016990018

DOE-DP-STD-3016-99

Other meanings may be encountered in Safety Analysis Reports (SARs) and/or Hazard Analysis Reports

(HARs), including the seismic safety analyst's use of the term "hazard" to reflect the frequency versus

severity relationship for ground motion due to earthquakes and the statistician's or reliability engineer's use

of "hazard" to refer to the transition rate from a normal to a failed state.

Hazard Analysis (HA). The determination of material, system, process, and plant characteristics that can

produce undesirable consequences followed by the assessment of hazardous situations associated with a

process or activity. Largely qualitative techniques are used to pinpoint weaknesses in the design or

operation of the facility and in the design and conduct of specific nuclear explosive operations and

associated activities that could lead to accidents. The SAR and HAR hazard analyses examine the

complete spectrum of potential accidents that could expose members of the public, onsite workers, facility

workers, and the environment to hazardous materials or other adverse effects [adapted from DOE-STD-

3009-94].

Hazard Analysis Report (HAR). A report that documents the systematic evaluation of hazards to

workers, the public, and the environment for a specific nuclear explosive operation and its associated

activities including information on controls which establish the safety basis for the operation [adapted from

DOE O 452.2A].

Hazardous Material. Any solid, liquid, or gaseous material that is toxic, explosive, flammable, corrosive,

or otherwise physically or biologically threatening to human health [DOE O 5480.23].

High Explosive Deflagration. A rapid chemical reaction in which the output of heat is sufficient for the

reaction to proceed and be accelerated without input of heat from another source. Deflagration is a surface

phenomenon with the reaction products flowing away from the unreacted material along the surface at

subsonic velocity. The effect of a true deflagration under confinement is an explosion. Confinement of the

reaction increases pressure, rate of reaction and temperature, and may cause transition into detonation

[DOE Manual 440.1-1].

High Explosive Detonation. A violent chemical reaction within a chemical compound or mechanical

mixture evolving heat and pressure. A detonation is a reaction that proceeds through the reacted material

toward the unreacted material at a supersonic velocity. The result of the chemical reaction is exertion of

extremely high pressure on the surrounding medium, forming a propagating shock wave that is originally of

supersonic velocity [DOE Manual 440.1-1].