Study on Seismic Decoupling Criteria of Primary and Secondary System of Nuclear Power Plant

Huang Yi; Luan Lin; Gao Fuhai; Qi Min; Ke Guotu; Li Xiaoxuan

doi:10.13832/j.jnpe.2023.06.0179

Volume 44 Issue 6

Dec. 2023

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Huang Yi, Luan Lin, Gao Fuhai, Qi Min, Ke Guotu, Li Xiaoxuan. Study on Seismic Decoupling Criteria of Primary and Secondary System of Nuclear Power Plant[J]. Nuclear Power Engineering, 2023, 44(6): 179-185. doi: 10.13832/j.jnpe.2023.06.0179

Citation:

Huang Yi, Luan Lin, Gao Fuhai, Qi Min, Ke Guotu, Li Xiaoxuan. Study on Seismic Decoupling Criteria of Primary and Secondary System of Nuclear Power Plant[J]. Nuclear Power Engineering, 2023, 44(6): 179-185. doi: 10.13832/j.jnpe.2023.06.0179

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Study on Seismic Decoupling Criteria of Primary and Secondary System of Nuclear Power Plant

doi: 10.13832/j.jnpe.2023.06.0179

1.
China Institute of Atomic Energy, Beijing, 102413, China
2.
China Academy of Machinery Science and Technology, Beijing, 100082, China

Received Date: 2022-11-28
Rev Recd Date: 2023-07-14
Publish Date: 2023-12-15

Abstract

Abstract

To expand the scope of seismic decoupling of primary and secondary systems in nuclear power plants, the requirements, basis, scope of application and limitations of seismic decoupling criteria in nuclear power plant codes were studied in this paper, and a decoupling model with modified stiffness was proposed. The coupling frequency of the primary and secondary system was derived by spring-mass model of two mass points, decoupling diagrams of each decoupling model were drawn based on the error analysis. Analyzed the applicability of each decoupling model, and compared seismic decoupling diagram criterion with seimic clause decoupling criterion. The results show that when frequency ratio of primary and secondary system λ_fi <1 and mass ratio λ_m <0.166, the decoupling model proposed in this paper can better simulate the secondary system frequency offset caused by coupling effect, with smaller frequency error; the seismic decoupling criteria can ensure that frequency errors of the primary and secondary system after decoupling are less than 10% when adopted decoupling model provided in codes. The proposed modified stiffness decoupling model expands the applicability range of the seismic decoupling diagram criterion. The research work provide references for the assessment of seismic decoupling and the selection of decoupling models for the primary and secondary systems of nuclear power plants.
- Seismic decoupling criteria,
- Primary and secondary systems,
- Coupling model

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References(10)

References

[1]	国家核安全局. 核电厂设计中总的安全原则: HAD 102/01[S]. 北京: 中国法制出版社, 1998: 343.
[2]	国家核安全局. 核动力厂抗震设计与鉴定: HAD 102/02-2019[S]. 北京: 国家核安全局, 2019: 3.
[3]	HADJIAN A H. On the decoupling of secondary systems for seismic analysis[C]//6th World Conference on Earthquake Engineering. New Delhi, 1977.
[4]	中华人民共和国住房和城乡建设部. 核电厂抗震设计标准: GB 50267-2019[S]. 北京: 中国计划出版社, 2019: 8.
[5]	American Society of Civil Engineers. Seismic analysis of safety-related nuclear structures: ASCE/SEI 4-16[S]. Alexander: ASCE Press, 2017: 15.
[6]	U. S. Nuclear Regulatory Commission. Standard review plan, 3.7. 2 seismic system analysis: NUREG-0800[S]. Washington: U. S. Nuclear Regulatory Commission, 2013: 3.7. 2-10.
[7]	姚伟达,廖剑晖,张明,等. 核电厂抗震系统的耦合性分析[J]. 核安全,2015, 14(2): 87-94. doi: 10.3969/j.issn.1672-5360.2015.02.016
[8]	HADJIAN A H, ELLISON B. Decoupling of secondary systems for seismic analysis[J]. Journal of Pressure Vessel Technology, 1986, 108(1): 78-85. doi: 10.1115/1.3264755
[9]	HADJIAN A H. Some problems with the calculation of seismic forces on equipment[C]//Specialty Conference on Structural Design of Nuclear Plant Facilities. Chicago, 1973.
[10]	Division of Reactor Research and United States Atomic Energy Commission Development. Seismic requirements for design of nuclear power plants and test facilities: RDT Standard F9-2T[R]. Tennessee: Union Carbide Corporation Nuclear Division, 1974: 19-21.