Definitions - Continued - std102395

DOE-STD-1023-95

Facility One or more building(s) or structure(s), including systems and components, dedicated to a

common function (includes operating and non-operating facilities and facilities slated for decontamination

and decommissioning).

Flood Hazard Boundary Map An official map of a community issued by the Federal Insurance

Administration on which the boundaries of the flood plain, mud slide, and/or flood-related erosion areas

having special hazards have been drawn.

Flood Hazard Curve A frequency plot that characterizes the flood hazard at a specific site by giving the

return period or annual probability of exceedance as a function of the flood level at the site. The mean flood

hazard curve is used to determine the design basis flood (DBFL).

Graded Approach An approach in which SSCs are placed into performance categories such that the

required level of analysis, documentation, and actions are commensurate with:

(1)

The relative importance to safety, safeguards, the environment, and security;

(2)

The expected magnitude of any hazard involved;

(3)

The life cycle stage of the facility;

(4)

The programmatic mission of a facility;

(5)

The particular characteristics of the SSCs; and

(6)

The cost and replaceability of the SSCs.

Hydrodynamic Loads Dynamic fluid forces imposed on structures by the impact of moving fluid,

including floodwater.

Hydrostatic Loads Static fluid forces imposed on structures due to the pressure of contained and

surrounding fluids, including flood water.

Model Building Codes Published documents that contain design and construction requirements applicable

to normal commercial buildings. Examples are International Building Code, (IBC 2000).

Natural Phenomena Hazard (NPH) An act of nature (for example: earthquake, wind, hurricane, tornado,

flood, volcanic eruption, lightning strike, forest fire, snow, or extreme cold) which poses a threat or danger

to workers, the public, or to the environment by potential damage to structures, systems, and components

(SSCs).

Natural Phenomena Hazard Curve A frequency plot that characterizes the likelihood of occurrence of a

natural phenomena hazard at a specific site by giving the return period or annual probability of exceedance

as a function of a parameter used to characterize the level of the natural phenomena hazard. The mean

NPH curve is used to determine the design basis NPH event.