Hydrological Data Collection

DOE-STD-1022-94

water rise or decline. Collection of the characteristic data of these sources which could impact the site

shall be performed. The impact of these hydrologic hazards shall be defined with respect to their proximity

of the site and its elevation.

B. The extent of the data to characterize potential sources of flooding is dependent upon the

performance categories of the structures. For sites containing facilities with SSCs in Performance

Category 1 or 2, it is sufficient to utilize results of previous site-specific probabilistic flood hazard studies

(e.g., McCann and Boissonnade, 1988a, 1988b, and 1991), if available, or to utilize information provided

in the flood insurance studies by Federal Emergency Management Agency (FEMA) and any other reliable

hydrology resource as listed in Paragraph 5.3.1 .F.

C. For sites containing facilities with SSCs in Performance Category 3 or 4, and for which no site-specific

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

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

5.3.1 Hydrological Data Collection

A. The location, size, shape, and other hydrologic characteristics of streams, lakes, shore regions, and ground

water environment influencing the site shall be described. In addition, there shall be a quantitative

description of existing and planned water control structures that may influence the hydrologic conditions

at the site.

B. The hydrologic events which are potential sources of flooding for the site should be determined. The

hydrologic events considered shall include:

Sources

Hydrologic Events

River Flooding

Precipitation, snow melt, debris jams, ice jams, rapid sedimentation

(volcano)

Dam Failure

Earthquake, flood, volcano, landslide, static failure

Levee or Dike Failure

Earthquake, flood, static failure, upstream dam failure,

landslide, volcano

Flood Runoff/Drainage

Precipitation, ponding, drainage capacity

Tsunami

Earthquake

Seiche

Earthquake, wind

Storm Surge

Hurricane

Wave

Wind, Tsunami

Ground Water

Precipitation, ponding, flooding, drought and over pumping

Mudflows

Volcano, earthquake

Subsidence-induced Flooding

Fluid extraction (e.g., Gulf Coast, Sacramento Valley, etc.,)

C. The necessary hydrologic event data shall be collected to determine the flood sources and used to evaluate

potential flood hazards at the site.

D. This data collection process is iterative. Initial data requirements focus on the need to identify potential

sources of hydrologic hazards to the site. For each flood hazard a summary of hazard