Re-assessment of accumulators performance to identify VVER-1000 vulnerabilities against various break sizes of SB-LOCA along with SBO

Hosseini, Seyed Ali; Shirani, Amir Saeed; Zangian, Mahdi; Najafi, Alireza

doi:10.1016/j.pnucene.2019.103145

Cited by 13 publications

(2 citation statements)

References 9 publications

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“…Relative radial power distribution is the basis of the fuel assemblies grouping in the channels. The relative radial power distribution is defined as: indicates the power of the one fuel assemblies while is the average power of the fuel assemblies [12,13].…”

Section: Nuscale Steady-state Modelingmentioning

confidence: 99%

Investigation of the Natural Circulation FlowMap in NuScale Small Modular Reactor

Hosseini

Akbari

Shirani

et al. 2021

IJRRS

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Natural Circulation (NC) is an important mechanism in several industrial systems, and knowledge of its behavior is of interest to nuclear reactor design, operation and safety. The main safety issue in present nuclear reactors is to ensure the sufficient removal of decay heat during accidents. Recently, Small Modular Reactors (SMRs) have increasingly received a lot of positive attention and even several types of these reactors are in different stages of design and construction. Some of these SMRs, such as NuScale, are designed to operate in full NC mode as the main mechanism of the primary coolant drive force for heat removal from the reactor core during normal operation. The present study deals with the Natural Circulation Flow Map (NCFM) investigation in the NuScale reactor as one of the SMRs that operate in full NC mode. At first, NuScale reactor elements are modeled with RELAP5 thermal-hydraulic code. Then, after the verification of the steady-state modeling, the operational point of the NuScale reactor is indicated in NCFM that is based on the database of different PWR simulators (gathered from the experimental test facilities). The evaluation of Natural Circulation Performance (NCP) of this reactor has proved the good design of NCP during normal operation in comparing typical PWRs operations in high power cases.

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Section: Nuscale Steady-state Modelingmentioning

confidence: 99%

Investigation of the Natural Circulation FlowMap in NuScale Small Modular Reactor

Hosseini

Akbari

Shirani

et al. 2021

IJRRS

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show abstract

“…where P 0 m is the linear power for each mesh, P t is SMART core total thermal power, PPF m;Rdial and PPF m;Axial are radial and axial PPF for each mesh, N m and NðFAÞ are the total number of meshes and fuel assemblies and L m is the length of each axial mesh (Vahman et al, 2016;Hosseini et al, 2020).…”

Section: Thermo-neutronic Calculation Proceduresmentioning

confidence: 99%

Small modular reactor full scope core optimization using Cuckoo Optimization Algorithm

Akbari

Ochbelagh

Gharib

et al. 2020

Progress in Nuclear Energy

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A design of switching supervisory control based on fuzzy-PID controllers for VVER-1000 pressurizer system with RELAP5 and MATLAB coupling

Lotfi

Menhaj

Hosseini

et al. 2020

Annals of Nuclear Energy

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Re-assessment of accumulators performance to identify VVER-1000 vulnerabilities against various break sizes of SB-LOCA along with SBO

Cited by 13 publications

References 9 publications

Investigation of the Natural Circulation FlowMap in NuScale Small Modular Reactor

Investigation of the Natural Circulation FlowMap in NuScale Small Modular Reactor

Small modular reactor full scope core optimization using Cuckoo Optimization Algorithm

A design of switching supervisory control based on fuzzy-PID controllers for VVER-1000 pressurizer system with RELAP5 and MATLAB coupling

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