Comparative thermodynamic analysis of China Spallation Neutron Source second phase (CSNSII) SRF system cooling Scheme

Mei, Li; Rui, Ge; Miaofu, Xu; Zhengze, Chang; Minjing, Sang; Rui, Ye; Liangrui, Sun; Changcheng, Ma; Penghui, Li; Haochen, Xu; Ruixiong, Han; Shaopeng, Li; Feisi, He; Wenzhong, Zhou

doi:10.1016/j.applthermaleng.2023.120767

Cited by 2 publications

(1 citation statement)

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“…Dynamic cryogenic system modeling has been performed for many cryogenic systems, such as the CMS at the European Spallation Source [3], at CERN [4], at ITER [5], at J-PARC [6,] and at the Chinese Spallation Source [7]. All these organizations have pursued predictive capabilities for dynamic systemic response of cryogenic facilities.…”

Section: Numerical Approachmentioning

confidence: 99%

Dynamic systems modeling of the spallation neutron source cryogenic moderator system to optimize transient control and prepare for power upgrades

Goth,

Liu,

Maldonado

et al. 2024

IOP Conf. Ser.: Mater. Sci. Eng.

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Through support of the US Department of Energy’s Office of Basic Energy Sciences, Oak Ridge National Laboratory has begun applying machine learning methods to improve accelerator and target performance of the Spallation Neutron Source (SNS). These methods are being applied to the control optimization and power upgrade of the SNS Cryogenic Moderator System (CMS). A numerical model of the CMS has been developed to study these optimizations and system modifications using EcosimPro. This paper compares steady-state and transient numerical results with experimental data. Control optimization studies focused on dampening mass flow, temperature, and pressure fluctuations during sudden losses of accelerator beam power. This analysis was conducted by adjusting five proportional-integral-derivative controllers connected to four flow control valves and one heater. Future efforts include power uprate studies focused on increasing the CMS cooling capacity. The current accelerator power is 1.4 MW; the first target station is being upgraded to 2.0 MW as part of the Proton Power Upgrade effort. The CMS cooling capacity is sufficient for 2.0 MW operation.

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