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Working Group

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ANS-2.8, Probabilistic Evaluation of External Flood Hazards for Nuclear Facilities

Scope: This standard provides criteria for evaluating external flooding hazards at nuclear facilities and sites in the United States. An external flood hazard at a nuclear facility can result from a number of sources. This standard describes a framework and a process for conducting probabilistic analysis of external flood hazards, including guidance for gathering site and regional data, and conducting screening analyses.

ANS-2.9, Evaluation of Ground Water Supply for Nuclear Facilities

Scope: This standard provides criteria for the determination of the availability of ground water supplies for nuclear facilities with respect to both safety and non-safety related aspects.

ANS-2.13, Evaluation of Surface-Water Supplies for Nuclear Power Sites

Scope: This standard presents criteria for determining: The availability of a surface water supply for plant operation with respect to both safety and nonsafety-related aspects. Water supply related effects of low flows and low levels on plant operation with respect to both safety and nonsafety-related systems.

ANS-2.17, Evaluation of Subsurface Radionuclide Transport at Commercial Nuclear Power Plants

Scope: This standard provides criteria for the determination of the concentration of radionuclides in the ground water resulting from both postulated accidents and routine releases from nuclear facilities.

ANS-2.18, Evaluating Radionuclide Transport in Surface Water for Nuclear Facilities

Scope: This standard aims at establishing the requirements and providing a framework and recommended methodologies for the evaluation of the surface water transport and dilution of radionuclides in liquid effluent releases from nuclear power sites and nuclear facilities to demonstrate regulatory compliance of the dose limits. The approach can also be used to evaluate transport and migration of radionuclides from other reactor facilities that do not need to meet 10CFR20 dose limits.

ANS-2.19, Guidelines for Establishing Site-Related Parameters for Site Selection and Designs of ISFSIs (Water Pool Type)

Scope: This standard presents guidelines for establishing site-related parameters for site selection and design of an independent spent fuel storage installation (ISFSI). This installation provides storage of spent light water reactor (LWR) fuel that has aged a minimum of one year after discharge from the reactor core in a water basin type structure. Such an installation may be independent of both a nuclear power station and a reprocessing facility, or located adjacent to these facilities in order to share selected support systems. Aspects considered include flooding, geology, seismology, ground water, foundation engineering, earthwork engineering, and extreme wind conditions. These guidelines identify the basic site-related parameters to be considered in site evaluation, and in the design, construction, and operation of the ISFSI.

ANS-2.32, Remediation of Radioactive Contamination in the Subsurface at Nuclear Power Plants

Scope: This standard describes actions and documentation that facilitate remedy decisions for radionuclide contamination in the subsurface at nuclear power plants. The content includes operational, infrastructure, and contaminant considerations with respect to how they impact the strategy for subsurface remediation. This standard builds from the existing ANS-2.17 standard (evaluating subsurface contamination) by providing a description of the elements of subsurface remediation, from determining the need for remediation, to selection, to implementation, and through closure.

Last modified July 21, 2016, 1:57pm CDT