Seismic base isolation technologies for Korea advanced liquid metal reactor

Yoo, B. O.; Lee, Jae-Han; Koo, Gyeong-Hoi; Lee, Hyeong-Yeon; Kim, Jong Bum

doi:10.1016/s0029-5493(99)00062-x

Cited by 18 publications

(8 citation statements)

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“…KALIMER is a 150 MWe, sodium cooled pool-type reactor. The Safe Shutdown Earthquake (SSE) for KALIMER is 0:3g in the horizontal direction [6].…”

Section: Shaking Table Test Results Of Isolated Test Structurementioning

confidence: 99%

“…In nuclear facilities, the secondary structures related to the reactor safety, such as reactor vessel and internal structures, reactor core fuel assemblies, reactor shutdown systems, and primary coolant piping system, are sensitive to the oor acceleration response spectra and relative displacements at their supports. The seismic base isolation concepts have been used to achieve the safety enhancement and the economic competitiveness in the design of advanced reactors [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Study on effects of damping in laminated rubber bearings on seismic responses for a ⅛ scale isolated test structure

Yoo

Kim

2002

Earthq Engng Struct Dyn

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SUMMARYThe e ects of damping in various laminated rubber bearings (LRB) on the seismic response of a 1 8 -scale isolated test structure are investigated by shaking table tests and seismic response analyses. A series of shaking table tests of the structure were performed for a ÿxed base design and for a base isolation design. Two di erent types of LRB were used: natural rubber bearings (NRB) and lead rubber bearings (LLRB). Three di erent designs for the LLRB were tested; each design had a di erent diameter of lead plug, and thus, di erent damping values. Artiÿcial time histories of peak ground acceleration 0:4g were used in both the tests and the analyses. In both shaking table tests and analyses, as expected, the acceleration responses of the seismically isolated test structure were considerably reduced. However, the shear displacement at the isolators was increased. To reduce the shear displacement in the isolators, the diameter of the lead plug in the LLRB had to be enlarged to increase isolator damping by more than 24%. This caused the isolator sti ness to increase, and resulted in amplifying the oor acceleration response spectra of the isolated test structure in the higher frequency ranges with a monotonic reduction of isolator shear displacement.

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“…KALIMER is a 150 MWe, sodium cooled pool-type reactor. The Safe Shutdown Earthquake (SSE) for KALIMER is 0:3g in the horizontal direction [6].…”

Section: Shaking Table Test Results Of Isolated Test Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on effects of damping in laminated rubber bearings on seismic responses for a ⅛ scale isolated test structure

Yoo

Kim

2002

Earthq Engng Struct Dyn

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“…1) Radial power peaking factor is required to stay low enough, lower than 1.5, to reduce thermal stress on structures from temperature difference and to secure high margins on fuel melting (Choi et al, 2011a); 2) Reliable seismic isolation has to endure an earthquake of 0.5 g zero period acceleration (ZPA) for the safe shutdown earthquake (SSE) (Yoo et al, 2000); 3) Containment built underground is needed to assure robust features in support of air defense, explosion proof, and protection from external sabotage actions.…”

Section: Design Goals and Constraintsmentioning

confidence: 99%

“…A passive type of seismic isolators is to achieve this goal (Yoo et al, 2000). The seismic design will be based on the earthquake of 0.5g ZPA for SSE.…”

Section: D Seismic Isolationmentioning

confidence: 99%

Advanced passive design of small modular reactor cooled by heavy liquid metal natural circulation

Shin

Choi

Cho

et al. 2015

Progress in Nuclear Energy

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“…In the two-dimensional seismic isolation system, high damping laminated rubber bearings [5], similar to that in PRISM [6] and in KALIMER [7,8] are used. The vertical design load is selected to be 320 tons and the horizontal isolation frequency and the vertical frequency were determined to be 0.5 Hz and 21 Hz respectively.…”

Section: Seismic Base Isolation Systems For Star-lmmentioning

confidence: 99%

Application of Seismic Isolation to the STAR-LM Reactor

Yoo

Kulak

2002

10th International Conference on Nuclear Engineering, Volume 1

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This paper presents findings from our initial work in developing a seismic isolation system for the STAR-LM reactor design. Research and development was carried out to determine the characteristics of the isolator device. The heavy weight and small footprint presented a challenge in bearing design and bearing placement. Results are also presented from a study on the use of three-dimensional seismic isolation devices to the full-scale reactor. Both two-dimensional (i.e., one device for horizontal isolation only) and integral (i.e., one device for horizontal and vertical) concepts were explored. The seismic analysis responses of the two-dimensional and the three-dimensional isolation systems for the STAR-LM are compared with that of the conventional fixed base system. Finally, results are presented from a study on the effects of the levels of vertical and horizontal damping on the seismic response of STAR-LM.

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Seismic base isolation technologies for Korea advanced liquid metal reactor

Cited by 18 publications

References 0 publications

Study on effects of damping in laminated rubber bearings on seismic responses for a ⅛ scale isolated test structure

Study on effects of damping in laminated rubber bearings on seismic responses for a ⅛ scale isolated test structure

Advanced passive design of small modular reactor cooled by heavy liquid metal natural circulation

Application of Seismic Isolation to the STAR-LM Reactor

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