Application of hazard and operability analysis for safeguardability of a pyroprocessing facility

Lee, Jieun; Shigrekar, Amey; Borrelli, R.A.

doi:10.1016/j.nucengdes.2019.02.021

Cited by 7 publications

(6 citation statements)

References 36 publications

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“…where 0 ≤ d ω (1) ω (2) ≤ 1. When d ω (1) ω (2) is smaller, it indicates that the results of the two weights are closer.…”

Section: ) Determination Of Combination Weightmentioning

confidence: 99%

“…where 0 ≤ d ω (1) ω (2) ≤ 1. When d ω (1) ω (2) is smaller, it indicates that the results of the two weights are closer. When k ≥ 3, the Kendall concordance test method [34] in the non-parametric statistical method is generally used to test the consistency of multiple weighting results.…”

Section: ) Determination Of Combination Weightmentioning

confidence: 99%

“…In this paper, k = 2; thus, substitute ω and ω into Equation ( 13) to obtain d ω (1) ω (2) = 0.360. It shows that the correlation coefficients of the weights assigned by the two methods are in the range of (0, 0.360), indicating that the weights obtained by the two weighting methods are consistent.…”

Section: Case Applicationmentioning

confidence: 99%

“…Qualitative risk assessment method is a typical fuzzy analysis method, which can quickly and systematically assess resources, threats, and vulnerabilities. Commonly used qualitative risk assessment methods mainly include the hazard and operability analysis method (HAZOP) [1,2], expert investigation method [3], failure mode and effect analysis method (FMEA) [4][5][6] and failure mode effects and criticality analysis method (FMECA) [7][8][9]. The HAZOP method is used to determine the cause of this deviation by analyzing abnormal changes in process parameters during the production process and then analyze what measures should be taken.…”

Section: Introductionmentioning

confidence: 99%

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A Comprehensive Failure Risk Assessment Method of Machining Center Component Based on Topology Analysis

Zhang

Guo

2022

Applied Sciences

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The risk assessment of the failure mode of the traditional machining center component rarely considers the topological characteristics of the system and the influence of propagation risks, which makes the failure risk assessment results biased. Therefore, this paper proposes a comprehensive failure risk assessment method of a machining center component based on topology analysis. On the basis of failure mode and cause analysis, considering the correlation of failure modes, Analytic Network Process (ANP) is used to calculate the influence degree of failure modes, and it is combined with component failure mode frequency ratio and failure rate function to calculate independent failure risk. The ANP model of the machining center is transformed into a topological model, and the centrality measurement of network theory is used to analyze the topology of the machining center. The weight of the topological structure index is measured by subjective and objective weighting methods, and then the importance degree of the machining center component is calculated. In this paper, the coupling degree function is introduced to calculate the importance of the connection edge, which is combined with the failure probability to calculate the failure propagation influence degree, and the component propagation failure risk is calculated based on this. Finally, the independent failure risk and the propagation failure risk of the component are integrated to realize the failure risk assessment of the component. Taking a certain type of machining center as an example to illustrate the application, compared with the traditional assessment method, the effectiveness and advancement of the method proposed in this paper have been verified.

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“…where 0 ≤ d ω (1) ω (2) ≤ 1. When d ω (1) ω (2) is smaller, it indicates that the results of the two weights are closer.…”

Section: ) Determination Of Combination Weightmentioning

confidence: 99%

Section: ) Determination Of Combination Weightmentioning

confidence: 99%

Section: Case Applicationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Comprehensive Failure Risk Assessment Method of Machining Center Component Based on Topology Analysis

Zhang

Guo

2022

Applied Sciences

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“…Technically, this system should include an automatic inert-gas supply valve or regulator to control the oxygen concentration below the considered limit of oxygen concentration. is kind of control system should equip an analyzer to monitor the oxygen concentration continuously and allow the inert gas to purge the space to maintain the oxygen concentration at safe levels with an acceptable margin of safety [24]. An increase in the concentration above the set point (for regular operation) or a decrease in the concentration below the set point (for initial purging) should initiate an alarm or control of the flow rate.…”

Section: Considerationsmentioning

confidence: 99%

Inerting Strategy for a Demonstration-Scale Hot Cell Facility Based on Experiences from Pilot-Scale Argon Cell Facility Operation and CFD Analysis

Lim

Cho

et al. 2021

Science and Technology of Nuclear Installations

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Pyroprocessing is being developed at Korea Atomic Energy Research Institute (KAERI), and in recent years, all process equipment required for integrated processes have been examined in the PyRoprocess-integrated Inactive DEmonstration (PRIDE) facility. Based on the successful operation of a pilot-scale facility, a conceptual design for this scale-up facility was actualized. Implementing a “demonstration-scale” hot cell facility is challenging as it is intended to supersede PRIDE and satisfy the increased requirements of larger-scale facilities. This study focused on an inerting strategy for a larger-scale (demonstration-scale) hot cell facility to achieve conditions equivalent to those in a pilot-scale gas-tight argon cell facility. The study applies the inerting strategy to a demonstration-scale hot cell facility beyond that of the currently existing pilot-scale hot cell facility and performs computational fluid dynamics (CFD) simulation with various flow rates to determine an appropriate approach for inerting the target facility. To this end, practical constraints on the simulation are introduced based on experiences from the existing pilot-scale facility. The results show that the purging flow rate should be accurately predicted, and a variable flow rate should be applied to achieve hot cell inerting effectively. The required purging time and amount of inerting source are essential factors in the larger-scale hot cell facility. The study results can be helpful in the design of large hot cell facilities operated under inert conditions.

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Probabilistic modeling for dynamic processes

et al. 2020

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The probability of event occurrence can be determined by calculation, however for complex processes, accounting for multiple states is so complex that the probability of the final event cannot be determined differently than by collecting statistical data. This reduces the ability to predict outcomes in any process simulation, which affects the quality of advanced systems. The development of methods for predicting the probability of occurrence of an event when considering complex dynamic processes is a pressing task, the solution of which will help to improve the quality of modeling of technological processes and, as a result, to increase the efficiency of designing machines implementing them. The authors proposed a probability modeling method for dynamic processes, which is a special way of applying probability theory and is workable if the change in the parameters analyzed corresponds to the normal law of distribution. A study carried out on the analysis of the process of sowing corn seeds by vacuum sowing made it possible to predict with reliability more than 95% the probability of formation of “zero seed fodders” depending on their physical and mechanical properties, as well as parameters and adjustment modes of operation of the device.

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Application of hazard and operability analysis for safeguardability of a pyroprocessing facility

Cited by 7 publications

References 36 publications

A Comprehensive Failure Risk Assessment Method of Machining Center Component Based on Topology Analysis

A Comprehensive Failure Risk Assessment Method of Machining Center Component Based on Topology Analysis

Inerting Strategy for a Demonstration-Scale Hot Cell Facility Based on Experiences from Pilot-Scale Argon Cell Facility Operation and CFD Analysis

Probabilistic modeling for dynamic processes

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