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2021 ANS Winter Meeting and Technology Expo
November 30–December 3, 2021
Washington, DC|Washington Hilton
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Matthew Denman: On Probabilistic Risk Assessment
Probabilistic risk assessment is a systematic methodology for evaluating risks associated with a complex engineered technology such as nuclear energy. PRA risk is defined in terms of possible detrimental outcomes of an activity or action, and as such, risk is characterized by three quantities: what can go wrong, the likelihood of the problem, and the resulting consequences of the problem.
Matthew Denman is principal engineer for reliability engineering at Kairos Power and the chair of the American Nuclear Society and American Society of Mechanical Engineers Joint Committee on Nuclear Risk Management’s Subcommittee of Standards Development. As a college student at the University of Florida, Denman took a course on PRA but didn’t enjoy it, because he did not see its connection to the nuclear power industry. Later, during his Ph.D. study at the Massachusetts Institute of Technology, his advisor was Neil Todreas, a well-known thermal hydraulics expert. Todreas was working on a project with George Apostolakis, who would leave MIT to become a commissioner of the Nuclear Regulatory Commission. The project, “Risk Informing the Design of the Sodium-Cooled Fast Reactor,” was a multi-university effort funded through a Department of Energy Nuclear Energy Research Initiative (NERI) grant. Todreas and Apostolakis were joined in this project by a who’s who of nuclear academia, including Andy Kadak (MIT, ANS past president [1999–2000]), Mike Driscoll (MIT), Mike Golay (MIT), Mike Lineberry (Idaho State University, former ANS treasurer), Rich Denning (Ohio State University), and Tunc Aldemir (Ohio State University).
Educational Session|Sponsored by Nuclear Supply Chain
Tuesday, August 11, 2020|11:00AM–12:30PM (12:00–1:30PM EDT)|4
Roger Smith (Duke Energy)
Jim Ripple (Southern Nuclear)
Lee Causey (Duke Energy)
Inventory levels at most all of our nuclear facilities continue to grow while economic pressures would dictate better uses of the financial resources. In fact, a reduction of inventory levels is desired without inappropriately increasing operational risk to the sites. Complicating the equation on balancing of risk is the increasing obsolescence of materials, a declining supplier base, digital influx in the I&C arena, and loss of utility inventories as plants close. This session will be a workshop in which various inventory management related topics will be discussed with the goal of a white paper for utilities to use as a reference document for individual inventory optimization programs. In addition, the results of this workshop will also be reviewed at the annual Nuclear Supply Chain Strategic Leaders (NSCSL) conference to be held later this conference week. Topics to be discussed are inventory reduction success examples, use of “repair warehouses,” critical spare identifications, End-of-Life stocking algorithms, and other issues now confronting our inventory managers.
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