Performance analysis of the second stage accumulators in BNPP-1 in response to MB-LOCA with SBO: A support for practical modification in the injection line

Hosseini, Seyed Ali; Shirani, Amir Saeed; Najafi, Alireza; Sedghkerdar, Abbas

doi:10.1016/j.pnucene.2020.103435

Cited by 6 publications

(1 citation statement)

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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%