Thermal hydraulic experiments at the S-Allegro large-scale experimental facility

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F21%3AN0000216" target="_blank" >RIV/26722445:_____/21:N0000216 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Thermal hydraulic experiments at the S-Allegro large-scale experimental facility

Original language description

The S-Allegro loop, located at Research Centre Rez, Czech Republic, is a large-scale experimental facility intended for a wide range of high temperature helium experiments. The facility is a scaled-down of the gas-cooled fast reactor (GFR) demonstrator ALLEGRO and is composed of a primary helium circuit with an electrically heated reactor vessel, a secondary helium circuit, a tertiary water circuit, and a dedicated loop for decay heat removal experiments. The operational parameters of the helium circuits correspond to those of the GFR and the high temperature reactor (HTR), reaching temperatures up to 850 °C, pressures up to 7 MPa, and flow rates up to 0.5 kg/s. The purpose of the facility is to verify the systemic behavior of the ALLEGRO concept during both nominal and accident scenarios; to test high temperature helium components, such as heat exchangers and blowers; and to provide thermal hydraulic data for computational model benchmarking. In this paper, an experimental campaign focused on thermal hydraulic experiments with the helium circuits under the relevant HTR conditions is described. Selected steady state experiments with a focus on the heat transfer assessment of the main component are also presented, and the results of a thermal hydraulic computational model of the loop are compared with the experimental data. The ability of the model to predict the systemic behavior of the loop is evaluated and data is provided that describe the thermal hydraulic behavior of a complex system with high temperature helium. Moreover, the experience and lesson learned from the operation of the large-scale helium facility are shared.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Project

<a href="/en/project/TH02020675" target="_blank" >TH02020675: Innovative materials, manufacturing technology and structural design for heat exchange at high temperatures in the nuclear and chemical technology processes</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of International Conference on High Temperature Reactor Technology

ISBN

978-623-97722-0-8

ISSN

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e-ISSN

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Number of pages

8

Pages from-to

109-116

Publisher name

Indonesian Nuclear Society

Place of publication

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Event location

Virtual, Indonesia

Event date

Jun 2, 2021

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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