Demonstration of LOTUS multiphysics BEPU analysis framework for LB-LOCA simulations

Zhang, Hongbin; Szilard, Ronaldo; Epiney, Aaron; Vaghetto, Rodolfo; Ban, Heng; Blakley, Cole

doi:10.1016/j.anucene.2018.08.027

Title: Demonstration of LOTUS multiphysics BEPU analysis framework for LB-LOCA simulations

Journal Article · Sat Aug 18 00:00:00 EDT 2018 · Annals of Nuclear Energy (Oxford)

DOI:https://doi.org/10.1016/j.anucene.2018.08.027· OSTI ID:1618429

^[1]; Szilard, Ronaldo ^[1];

^[1]; Vaghetto, Rodolfo ^[2]; Ban, Heng ^[3]; Blakley, Cole ^[4]

Idaho National Lab. (INL), Idaho Falls, ID (United States)
Texas A & M Univ., College Station, TX (United States)
Univ. of Pittsburgh, PA (United States)
Utah State Univ., Logan, UT (United States)

The LOCA Toolkit for U.S. light water reactors (LOTUS) currently under development at Idaho National Labs (INL) is a plug and play, multiphysics environment to be used in support of system level plant transient analysis. New proposed rule changes in LOCA safety regulations (10 CFR 50.46c) require the inclusion of cladding hydrogen content in the evaluation of equivalent cladding reacted (ECR) and peak cladding temperature (PCT). The potential for a future implementation of said rule change motivates the current development of a unique union of core design, system analysis, and fuel performance codes within a framework allowing for uncertainty quantification (UQ). A demonstration of LOTUS capabilities to address this potential need is performed with an integration of the core design code PHISICS, the fuel performance code FRAPCON, and the system analysis code RELAP5-3D. UQ is performed via Wilks’ method to compute the one sided 95/95 confidence values of the aforementioned safety metrics. Results demonstrate the benefits of the Multiphysics Best Estimate Plus Uncertainty (MP-BEPU) methodology and provide useful visualization of the limiting cases.

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Research Organization:: Idaho National Laboratory (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC07-05ID14517

OSTI ID:: 1618429

Alternate ID(s):: OSTI ID: 1703572

Report Number(s):: INL-JOU-18-45131-Rev000; TRN: US2106816

Journal Information:: Annals of Nuclear Energy (Oxford), Vol. 122, Issue C; ISSN 0306-4549

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1 work

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