作者机构：
[Wei, Yuezhou; Hamza, Mohammed F.] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Zaki, Doaa I.; Hamza, Mohammed F.; Abdellah, Walid M.] Nucl Mat Author, El Maadi, Cairo 11728, Egypt.;[Wei, Yuezhou] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China.;[Althumayri, Khalid] Taibah Univ, Coll Sci, Dept Chem, Al Madinah Al Munawarah 30002, Saudi Arabia.;[Brostow, Witold; Hamad, Nora A.] Univ North Texas, Dept Mat Sci & Engn, Lab Adv Polymers & Optimized Mat LAPOM, 3940 North Elm St, Denton, TX 76207 USA.
通讯机构：
[Mohammed F. Hamza; Yuezhou Wei] A;Authors to whom correspondence should be addressed.<&wdkj&>Nuclear Materials Authority, El-Maadi, Cairo 11728, Egypt<&wdkj&>School of Nuclear Science and Technology, University of South China, Hengyang 421001, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China<&wdkj&>School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
关键词：
biopolymer;phosphorylated sorbent;uptake kinetics;sorption isotherms;rare earth elements
摘要：
Phosphonic acid functionalization of gellan gum and chitosan biopolymers was successfully performed. In the first step, the sorption was investigated using La(III) ions before testing for the recovery of rare earth elements (REEs) from pretreated industrial acidic leachate. The sorbent was characterized by Fourier-transform infrared (FTIR), scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX), thermogravimetric analysis (TGA), Brunauer-Emmett-Teller (BET), and pH of zero charge (pH(PZC)) determination. FTIR and EDX results show efficient grafting of phosphoryl groups. The sorption was determined for the crude materials before functionalization (PGEG) and after phosphorylation (TBP-PGEG). More efficient sorption was seen for phosphorylated sorbent than for the crude composite. The sorption capacity is 0.226 mmol La g(-1) for the PGEG while the value is 0.78 mmol La g(-1) for the TBP-PGEG. We infer that phosphonate groups participate in the sorption. The most effective sorption is at pH = 4. The kinetic behavior was described using pseudo first-order equations (PFORE), pseudo second-order equations (PSORE), and resistance to intraparticle diffusion (RIDE). The sorption isotherms can be better represented by Langmuir and Sips equations than by the Freundlich equation. The sorbent shows high stability performance during reuse cycles with a limit on the decrease in the sorption performances and stability in the desorption performances. We have thus developed a good tool for the recovery of REEs with a selectivity higher than that of the non-functionalized components.
作者机构：
[Su, Lingling; Chen, Zhenping; Yang, Chao; Lei, Jichong; Huang, Gan; Yu, Tao] Univ South China, Sch Nucl Sci & Technol, Hengyang 421000, Peoples R China.;[Chen, Zhenping; Yang, Chao; Lei, Jichong; Huang, Gan; Yu, Tao] Univ South China, Res Ctr Digital Nucl Reactor Engn & Technol Hunan, Hengyang 421000, Peoples R China.
通讯机构：
[Zhenping Chen; Tao Yu] A;Authors to whom correspondence should be addressed.<&wdkj&>School of Nuclear Science and Technology, University of South China, Hengyang 421000, China<&wdkj&>Research Center for Digital Nuclear Reactor Engineering and Technology of Hunan Province, University of South China, Hengyang 421000, China
关键词：
long burning cycle;reactivity loss;breeding performance;physical properties;lead-based reactors
摘要：
The choice of an appropriate fuel can effectively prolong the refueling cycle of a reactor core. The Th-U cycle and U-Pu cycle are commonly used fuel breeding cycles. Oxide fuels, nitride fuels, and metal fuels are the primary candidate fuels for lead-based reactors. For fuel selection, a core model of a 60 MWt reactor was established. The results show that the breeding performance of the breeding fuel Th-232 is better than that of U-238, and the driving performance of the driving fuel Pu-239 is better than that of U-235. Therefore, PuO2-ThO2, PuN-ThN, and Pu-Th-Zr fuels may have good performance. By comparing the reactivity loss of three types of fuel, it was found that the reactivity loss of PuN-ThN fuel is the smallest. Hence, using PuN-ThN fuel as a core fuel can result in a longer refueling cycle. On this basis, PuN-ThN fuel was used in the preliminary design of the 120 MWt core physical model. It can be seen that when PuN-ThN fuel is used as the core fuel, a smaller reactivity swing (1408 pcm), smaller power peak factor, and super long refueling cycle (more than 30 years) can be obtained.
摘要：
Performance shaping factors (PSFs) describe the influence of given contexts on human performance and are used to quantify human error probabilities (HEPs). HEPs are calculated within human reliability analysis, which is a part of probabilistic risk assessment. One challenge lies in the fact that the dependencies among PSFs are neglected, which leads to the poor estimation of HEPs. The objective of this research is to apply a system dynamics approach to the modeling and analysis of the dependencies of PSFs within the standardized plant analysis of risk-human reliability analysis method. Dependencies are built on the causalities of PSFs and are determined by the mutual information theory and the analytic hierarchy process. The method is demonstrated on three human failure events. The first one is the failure of initiating reactor coolant system depressurization. The second one is the failure of throttling the high-pressure injection to reduce reactor coolant system pressure. The third one is the failure of diagnosing the steam generator tube rupture. The sensitive analysis results show that our model is reasonable and robust when dependencies are taken into account.
期刊：
International Journal of Industrial Ergonomics,2021年81:103051 ISSN：0169-8141
通讯作者：
Zhang, Li
作者机构：
[Zheng, Tengjiao; Zhang, Li; Liu, Jianqiao] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Qing, Tao; Zhang, Li; Zou, Yanhua] Hunan Inst Technol, Inst Human Factors & Safety Engn, Hengyang 421002, Peoples R China.;[Wang, Wei] City Univ Hong Kong, Dept Mech Engn, Hong Kong, Peoples R China.;[Ding, Qianqiao] Hunan Inst Technol, Sch Safety & Environm Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Zhang, Li] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
Modifications;Performance shaping factors;Definitions;Standardized plant analysis of risk-human reliability analysis;Nuclear power plants
摘要：
The performance shaping factors (PSFs) of the standardized plant analysis of risk-human reliability analysis (SPAR-H) method are unclearly defined, which contributes to the uncertainty of human reliability analysis (HRA) in nuclear power plants (NPPs). This work proposes an expert-based modification approach for redefining the PSFs based on four criteria in terms of less overlap, hierarchy, flexibility, and digitalization.
For demonstration, the proposed approach is used to assign PSFs to three specific human failure events in NPPs. Three tests (Kendall's W Test, Jonckheere-Terpstra Test, and Paired Samples Test) are applied to analyze the assignments. Compared to the PSF assignment of SPAR-H, the results show that the redefined PSFs meet the four criteria and reduce the overestimation of human error probabilities (HEPs).
期刊：
Journal of Cleaner Production,2020年258 ISSN：0959-6526
通讯作者：
Wang, Hanqing
作者机构：
[Ding, Rui; Sui, Yang; Wang, Hanqing] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Sui, Yang] Fujian Fuqing Nucl Power Co Ltd, Fuqing 350300, Peoples R China.
通讯机构：
[Wang, Hanqing] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
Nuclear power plant construction project;Occupational health and safety and environment;Risk assessment;Mathematical model
摘要：
Nuclear Power Plant (NPP) construction project is a mega one with high level of occupational health and safety and environment (OHSE) risks, and it is necessary to propose an approach for the OHSE risk assessment so as to prevent the OHSE accidents or reduce their outcomes. However, there has not been such an approach due to the high uncertainty and complexity of NPP construction project. Therefore, this paper proposed a novel approach for the OHSE risk assessment which includes systematically identifying the OHSE risks by using brainstorming method, establishing an OHSE risk assessment index system by using Delphi method, and formulating a mathematical model by combining set pair analysis (SPA), trapezoidal fuzzy number (TPFN), and set-valued statistics (SVS) methods for determining the overall OHSE risk level for NPP construction project. The approach was used to assess the OHSE risks for the NPP construction project in East China, and its overall OHSE risk level was assessed at level 2 (low OHSE risk level). In addition, the problems in the OHSE risk management were found, and the corresponding OHSE risk treatments for these problems were implemented. The results showed that the approach helped reduce the OHSE risk level and protect the workers' occupational health and safety and the environment while the NPP construction project was under construction. (C) 2020 Elsevier Ltd. All rights reserved.
作者机构：
[Li, Pengcheng; Zhang, Li; Li, Xiaofang; Dai, Licao] Univ South China, Human Factor Inst, Hengyang 421001, Hunan, Peoples R China.;[Li, Pengcheng] Univ N Carolina, Syst Engn & Engn Management, Charlotte, NC 28223 USA.;[Li, Pengcheng] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Dai, Licao] U;Univ South China, Human Factor Inst, Hengyang 421001, Hunan, Peoples R China.
关键词：
Model validation;Simulation experiment;SA reliability;Fuzzy logic-AHP;Digital nuclear power plants
摘要：
Situation awareness (SA) reliability of operators is an important component of human reliability analysis (HRA) in digital nuclear power plants (NPPs). Therefore, how to identify effectively and reliably the risk of SA errors is of great significance for SA error prevention and risk reduction. SA reliability assessment model or method based on fuzzy logic and analytic hierarchy process (AHP) is forwarded in the first paper. In order to prove its effectiveness and reliability, sensitivity analysis and simulator experiments are applied to testify our model in this paper. The results show that the proposed assessment model of SA reliability has a certain degree of sensitivity as well as an accuracy of prediction, and there are a strong correlation and consistency between the predicted value from fuzzy inference system and the real value (or observed value) from simulator experiments. Although there are some differences between the predicted value and the real value based on the perspective of HRA, the model can be used to predict SA error probability or SA reliability within the range of 10 error factors as well as provide data and theoretical support for SA reliability assessment.
作者机构：
[Li, Pengcheng; Zhang, Li; Li, Xiaofang; Dai, Licao] Univ South China, Human Factor Inst, Hengyang 421001, Hunan, Peoples R China.;[Li, Pengcheng] Univ N Carolina, Syst Engn & Engn Management, Charlotte, NC 28223 USA.;[Li, Pengcheng] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.;[Zou, Yanhua] Hunan Inst Technol, Inst Human Factor & Safety Management, Hengyang 421002, Hunan, Peoples R China.
通讯机构：
[Li, Pengcheng] U;Univ South China, Human Factor Inst, Hengyang 421001, Hunan, Peoples R China.
关键词：
Situation awareness reliability;Fuzzy logic;Analytic hierarchy process;Digital nuclear power plants
摘要：
In digital control rooms, situation awareness (SA) reliability has become an important element affecting operator's reliability. In order to establish a more reasonable assessment method of SA reliability under the condition of very lack of data, based on the established influential factor model of SA reliability considering the causality relationship of performance shaping factors (PSFs) in this paper, a fuzzy logic and analytic hierarchy process (AHP)-based method is established to more objectively assess SA reliability. The weight of PSFs is identified using AHP, and a fuzzy logic method is used to simulate the fuzzy assessment and reasoning process of operator's SA reliability, and a standardized method is built to determine the fuzzy rule base of fuzzy reasoning system for SA reliability assessment for reducing the subjectivity and uncertainty of expert judgment. Finally, an example is provided to illustrate the specific application of the proposed method. The results show that the established method takes account of the weight of PSFs and their causal influencing relationship, and the fuzzy logic method used to assess SA reliability can overcome the subjectivity and uncertainty of expert judgment, which makes the assessment results more objective and realistic. Furthermore, the method can be used to get more SA error data and have a wide range of application value.
