ANS publishes new standard on external flood hazards

May 11, 2020, 2:03PMANS News

The ANS Standards Committee has just published ANSI/ANS-2.8-2019, “Probabilistic Evaluation of External Flood Hazards for Nuclear Facilities.” The new standard supersedes ANS-2.8-1992, which was withdrawn in 2002.

What it covers: Approved December 17, 2019, the standard establishes a process for identifying and evaluating design-basis flood hazards at nuclear facilities using a probabilistic approach. This represents a major revision of the previous standard, which presented design-basis flood methodologies for evaluating probable maximum flood hazards but established those hazards using deterministic rules rather than probabilistic concepts.

A necessary rewrite: A working group formed in 2012 determined that a major rewrite of the 1992 standard was needed. Additionally, insights gained from flooding at the Blayais reactor in France in 1999, as well as experience with Hurricane Katrina in 2005 and, more recently, the 2011 tsunami in Japan, made it clear to the working group that a more formal probabilistic approach should be used for setting design flood parameters. The rewrite was focused on a probabilistic approach for assessing the magnitude and occurrence of flood hazards that could be used in applications for the evaluation of nuclear facilities, including risk assessments and the establishment of the design-basis flood hazard.

Find this standard and more: All ANS standards, including ANSI/ANS-2.8-2019, are available for purchase in the ANS Standards Store at www.techstreet.com/ans.


Related Articles

The PRA standard for advanced non-LWRs

April 23, 2021, 2:55PMNuclear NewsKarl Fleming

The ASME/ANS Joint Committee on Nuclear Risk Management (JCNRM) has achieved a significant milestone in the advancement of probabilistic risk assessment (PRA) technology. ANSI/ASME/ANS...

Risk-informed, performance-based safety: Past, present, and future

Risk-informed and performance-based approaches to nuclear safety have saved money and improved safety for current reactors and have the potential to offer even greater benefits for advanced reactors.

June 26, 2020, 3:05PMNuclear NewsN. Prasad Kadambi, Edward Wallace, James O’Brien, and Robert Youngblood

Since the 1980s, the nuclear power industry in the United States has worked to enhance the regulatory framework for nuclear facilities by making it more risk-informed and performance-based...

ANS standards updates

May 12, 2020, 1:29PMNuclear News

ANS publishes standards that set forth requirements for the design, manufacture, or operation of a piece of equipment. These standards can address computer firmware and software, and can...

An Ethos of Nuclear Reactor Safety

January 16, 2014, 7:00AMANS Nuclear CafeSherrell R. Greene

The commercial nuclear power industry has a remarkable safety record despite lingering images from the accidents at Three Mile Island and Fukushima Daiichi. This record is the legacy of a...

New offerings from ANS

November 4, 2013, 5:59AMANS Nuclear Cafe

The American Nuclear Society is offering new materials in time for the holidays. Buy one for a friend.....and another for yourself!...