Mid-height seismic isolation of equipment in nuclear power plants: Numerical simulations and design recommendations

Lal, Kaivalya M.; Whittaker, Andrew S.; Sivaselvan, Mettupalayam V.

doi:10.1016/j.nucengdes.2023.112286

Mid-height seismic isolation of equipment in nuclear power plants: Numerical simulations and design recommendations

Journal Article · Fri Apr 21 00:00:00 EDT 2023 · Nuclear Engineering and Design

DOI:https://doi.org/10.1016/j.nucengdes.2023.112286· OSTI ID:2422271

^[1]; ^[2]; Sivaselvan, Mettupalayam V. ^[2]

State Univ. of New York at Buffalo, Amherst, NY (United States); OSTI
State Univ. of New York at Buffalo, Amherst, NY (United States)

Seismic isolation can mitigate earthquake demands on safety-class equipment and is being considered for application to some advanced nuclear reactors. For tall, slender vessels that could represent an advanced reactor, a steam generator or a heat exchanger, mid-height seismic isolation has been shown to be beneficial and practical. Here, this paper focuses on numerical modeling of a mid-height isolated tall, slender vessel with two primary goals 1) investigate and quantify the benefits of mid-height seismic isolation for a range of support structure stiffnesses, isolation systems, and seismic inputs, and 2) provide analysis and design recommendations for isolation of safety-class equipment. Results of response-history analysis were in good agreement with experimental measurements and demonstrated that mid-height isolation can substantially reduce seismic demands on tall, slender vessels for a range of support structure stiffnesses, isolation systems, and seismic inputs. Importantly, the reductions in horizontal spectral accelerations in the mid-height isolated vessel from the non-isolated condition were not affected by the stiffness of the support structure. Recommendations are made for analysis and design of isolated equipment and testing of isolators used for equipment protection in nuclear facilities, which are also applicable to other industries.

Research Organization:: State Univ. of New York (SUNY), Albany, NY (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: AR0000978

OSTI ID:: 2422271

Alternate ID(s):: OSTI ID: 1971566

Journal Information:: Nuclear Engineering and Design, Journal Name: Nuclear Engineering and Design Journal Issue: C Vol. 408; ISSN 0029-5493

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (9)

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