Site Description

DOE-STD-1022-94

and/or if investigations to define the hazards have not previously been conducted. The detailed

requirements in this section are applicable for obtaining the site information which is needed for

implementation of DOE NPH requirements.

The criteria needed to provide site-specific information to perform wind, flood, seismic, and other

geological hazard analyses are provided in Sections 5.1 to 5.5 (see also DOE-STD-3009-94). The

meteorological-related hazards include wind hazards due to storms and tornadoes, and flood hazards due

to intense precipitation and snow. Characterization of the information needed to assess these hazards is

addressed in Section 5.2. The hydrologic hazards include flooding either from surface water or ground

water. Section 5.3 provides criteria to collect site-specific information needed to quantify these hazards.

Criteria for seismic hazard characterization, volcanic hazards, and non-tectonic surface deformation are

provided in Section 5.4. Section 5.5 provides specific requirements to conduct geotechnical studies

relevant to the hazards being studied.

5.1 SITE DESCRIPTION

A. The description of the site and boundaries shall, at a minimum, include the following:

1. The geographical location of the site for which there shall be no ambiguity for estimating the distance

from the site to the sources of potential hazards, and for the use of hazard zone maps, such as those

provided in the model building codes.

2. A general location map to clearly define the boundary of the site and to show the relative distance from

the site to natural and man-made features, and to sources of potential hazards, such as rivers, lakes,

oceans, volcanoes, faults, dams, levees, etc.

3. Detailed mapping of topographic, hydrologic, surface, and subsurface geologic features, as appropriate

for the particular site conditions, with scales and contours suitable for NPH assessment. The

topographic map shall also show the character of surface drainage patterns and the topographic

elevation of the site relative to near-by hydrologic features, such as rivers, streams, or lakes and local

surface drainage channels, ponds, springs and sinks at the site.

5.2 METEOROLOGY

A. The sources of meteorological hazards include winds (straight, hurricane, and tornado winds), precipitations

and temperature changes. Meteorological data to be collected includes: (1) wind speeds and direction, (2)

precipitation and rainfall records, and (3) air temperature. The extent of meteorological data needed to be

collected is dependent upon the performance categories of facility SSCs.

B. For sites containing facilities with SSCs in Performance Category 1 or 2, it is sufficient to utilize results

of previous probabilistic wind hazard studies, if available, or to utilize information provided in model

building codes or national consensus standard such as ANSI/ASCE 7-98 (ASCE, 1998b). For sites

containing facilities with SSCs in Performance Category 3 or 4, and for which no up-to-date site-specific

probabilistic wind hazard studies have been performed in accordance with specifications in

DOE-STD-1023-95, site-specific characterization criteria are provided in the following paragraphs.