United States Nuclear Regulatory Commission - Protecting People and the Environment

Cross-Cutting Activities

The following table specifies the ongoing initiatives, projects, and activities that substantially crosscut multiple subarenas.

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Initiative, Program or Project Project Description and Major Activities Status
Sep 2013
Glossary of Risk-Related Terms Risk Basis: The glossary is intended to identify and define terms used in risk-informed activities related to commercial nuclear power plants. By providing a single source where the terms can be found, the glossary is intended to reduce ambiguity and facilitate communication on risk-informed activities. This glossary, NUREG-2122, has been submitted to publications, expected to be published by the end of October 2013.
Approach to PRA Quality: PRA standards and related peer review guidance

Risk Basis: Work with standard developing organization (SDO) and industry to develop necessary PRA standards and related peer review guidance for defining PRA quality in support of risk-informed activities. Develop standard that provides requirements for:

  1. Technical elements of the PRA
  2. Peer review
  3. Process to determine needed capability to support specific application

Scope of technical elements defining PRA quality in standard and peer review to address:

  • Level 1, 2 and 3
  • At-power and low power shutdown conditions
  • Internal and external hazards
More Information
Approach to PRA Quality: RG 1.200, “An Approach for Determining the Technical Adequacy of Probabilistic Risk

Risk Basis: Provide guidance (staff position) in four areas:

  1. Technically acceptable PRA
  2. SDO consensus standards and industry peer review guidance
  3. Demonstration that PRA used in regulatory application is of sufficient technical adequacy
  4. Documentation to support regulatory application

Scope of technical elements defining technically acceptable PRA includes:

  • Level 1, 2 and 3
  • At-power and low power shutdown conditions
  • Internal and external hazards
More Information
Approach to PRA Quality: NUREG-1855, “Guidance on the Treatment of Uncertainties Associated with PRAs in Risk-Informed Decision Making”

Risk Basis: Provide guidance on how to treat uncertainties associated with PRA in risk-informed Decision-making with regard to:

  1. Identifying and characterizing the uncertainties associated with PRA in support of the PRA Standard.
  2. Performing uncertainty analyses to understand the impact of the uncertainties on the results of the PRA.
  3. Factoring the results of the uncertainty analyses into the decision-making.

Scope of uncertainties associated with PRA to include:

  • Level 1 and 2
  • At-power and low power shutdown conditions
  • Internal hazards and seismic
More Information

To request additional information, Contact Us About Risk-Informed, Performance-Based Regulation.

Page Last Reviewed/Updated Wednesday, November 06, 2013