Neutronic analysis of control rod effect on safety parameters in Tehran Research Reactor

Torabi, Mina; Lashkari, A.; Masoudi, S. Farhad; Bagheri, Somayeh

doi:10.1016/j.net.2018.05.008

Cited by 18 publications

(8 citation statements)

References 4 publications

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“…The longest channel, named C, is a 6inch cylinder. Moreover, there are graphite blocks in two thermal columns at the stall end of the TRR pool 19 . In this study, the relative standard deviation (RSD) was used to evaluate the precision of NAA method and equipment, which is measured by Eq.…”

Section: Measuring the Element Concentration Using Naamentioning

confidence: 99%

Determining the Mobility of some Essential Elements in Saffron (Crocus sativus L.) by the Neutron Activation Analysis

Tousi

2022

Baghdad Sci.J

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The main purpose of this investigation is to evaluate the concentrations of six essential metals (Na + , Mg 2+ , K + , Ca 2+ , Fe 2+ and Zn 2+ ) in saffron and a farm soil using the neutron activation analysis (NAA) as a nuclear spectrometry method. The stratified random sampling method was used here. The NAA results showed the well uptake of Mg 2+ , K + , Ca 2+ , Fe 2+ , and Zn 2+ in saffron, which is lower than the toxicity range. Based on the contamination factor and geoaccumulation index, soil contamination levels were determined uncontaminated by Zn, moderately contaminated by Na + and Fe 2+ , and strongly contaminated by Ca 2+ , K + , and Mg 2+ . Results of the contamination degree and pollution load index indicated moderately/strongly soil contamination and a moderate geometric mean of the contamination index. The Na + enrichment factor (EF) showed a minimal man-made impact on sodium enrichment. Saffron cultivation has likely caused more accumulations of Mg 2+ , K + , Ca 2+ , and Fe 2+ , as well as a considerable deficiency of Zn 2+ in the soil, based on EFs. The biological concentration factor showed a significant zinc accumulation by the corm of saffron. There was well translocation from corm to all the aerial tissues for K + . Also, sodium adsorption ratio, exchangeable sodium percentage, pH, and electrical conductivity evaluated the non-salinity level of soil in all saffron farms.

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Section: Measuring the Element Concentration Using Naamentioning

confidence: 99%

Determining the Mobility of some Essential Elements in Saffron (Crocus sativus L.) by the Neutron Activation Analysis

Tousi

2022

Baghdad Sci.J

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“…Email: wahid@batan.go.id DOI: 10.17146/tdm.2022.24. 1.6593 An important part of the neutronic experiment is to measure several parameters related to the safety of nuclear reactor operation, such as the control rod worth and its Integral reactivity [1][2][3]. Integral reactivity curves were also used for reactor transient operation analysis [4][5][6].…”

Section: *Corresponding Authormentioning

confidence: 99%

Measured and Calculated Integral Reactivity of Control Rods in RSG-Gas First Core

et al. 2022

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The control rod worth is one of the important parameters for the operation of a nuclear reactor. Proper measurement and calculation of the control rod worth are essential for the safe reactor operation under normal and transient conditions that are initiated by a postulated event such as a stuck rod, control rods ejection, etc. This paper presents calculation results of integral reactivity of the RSG-GAS research reactor first core and its comparison with the experimental data. Calculations were performed using the continuous energy transport code Serpent 2 with ENDF/B-VIII.0 nuclear data. Integral reactivity measurement was done by compensating method with control rod bank, regulating rod, and reactivity meter. Calculations are carried out for each method used in control rod measurement data with an aim to validate calculated results to experimental data. Compared with the measured experiment data, there are no significant differences in calculation results of integral reactivity. The maximum difference of the control rod's total reactivity is 1.26% compared to the measurement carried out by compensating method with regulating rod.

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“…In nuclear reactor operation, the core power control is a crucial system for a nuclear reactor, which directly affects the safe operation of a nuclear reactor either reactor power or research reactor. For both types of reactors, it is important to ensure that the nuclear reactor is always operated under optimum and safe operating condition [1]. Therefore, continuous research and improvement of the core power control technology for a nuclear reactor is necessary.…”

Section: Introductionmentioning

confidence: 99%

An improved control rod selection algorithm for core power control at TRIGA PUSPATI Reactor

Minhat

Subha

Hassan

et al. 2020

JMES

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The 1 MWth TRIGA PUSPATI Reactor known as RTP undergoes more than 37 years of operation in Malaysia. The current core power control utilized Feedback Control Algorithm (FCA) and a conventional Control Rod Selection Algorithm (CRSA). However, the current power tracking performance suffers and increase the workload on Control Rod Drive Mechanism (CRDM) if the range between minimum and maximum rod worth value for each control rod has a significant difference. Thus, it is requiring much time to keep the core power stable at the power demand value within the acceptable error bands for the safety requirement of the RTP. In conventional CRSA, regardless of the rod worth value, the lowest position of the control rod is selected for up-movement to regulate the reactor power with 2% chattering error. To improve this method, a new CRSA is introduced named Single Control Absorbing Rod (SCAR). In SCAR, only one rod with highest reactivity worth value will be selected for coast tuning during transient and the lowest reactivity worth value will be selected for fine-tuning rod movement during steady-state. The simulation model of the reactor core is represented based on point kinetics model, thermal-hydraulic models and reactivity model. The conventional CRSA model included with control rod position dynamic model and actual reactivity worth curve data from RTP. The FCA controller is designed based on Proportional-Integral (PI) controller using MATLAB Simulink simulation. The core power control system is represented by the integration of a reactor core model, CRSA model and FCA controller. To manifest the effectiveness of the proposed SCAR algorithm, the results are compared to the conventional CRSA in both simulation and experimentation. Overall, the results shows that the SCAR algorithm offers generally better results than the conventional CRSA with the reduction in rising time up to 44%, workload up to 35%, settling time up to 26% and chattering error up to 18% of the nominal value.

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Neutronic analysis of control rod effect on safety parameters in Tehran Research Reactor

Cited by 18 publications

References 4 publications

Determining the Mobility of some Essential Elements in Saffron (Crocus sativus L.) by the Neutron Activation Analysis

Determining the Mobility of some Essential Elements in Saffron (Crocus sativus L.) by the Neutron Activation Analysis

Measured and Calculated Integral Reactivity of Control Rods in RSG-Gas First Core

An improved control rod selection algorithm for core power control at TRIGA PUSPATI Reactor

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