Designing Stainless Steel Reflector at VR-1 Training Reactor

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00347002" target="_blank" >RIV/68407700:21340/20:00347002 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1051/epjconf/202023917009" target="_blank" >https://doi.org/10.1051/epjconf/202023917009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/202023917009" target="_blank" >10.1051/epjconf/202023917009</a>

Result language

angličtina

Original language name

Designing Stainless Steel Reflector at VR-1 Training Reactor

Original language description

Light-water reactor cores are commonly surrounded by a stainless steel and water reflector. The reflectors are improving power distribution in the core, reducing the leakage of neutrons and thus also protecting the pressurized vessel from the neutron irradiation and the following embrittlement. Contrary to the standard procedures utilized for generation of the fuel assembly data, the reflector elements require a special approach. The major difficulty with the reflectors is represented by an absence of neutron sources in the reflector elements. Some artificial neutron source simulating the realistic source of neutrons from neutron leakage from the surrounding fuel assemblies must be added in the calculation model. The reflector data in the full-core calculations have a great impact on the power distribution in the core. The research in this field is usually focused on the square geometry, and therefore the accurate data for the hexagonal geometry are lacking. Improvements in this area are needed.Training Reactor VR-1 is used for measurements related to nuclear engineering. Department of Nuclear Reactors operating this reactor at the Czech Technical University in Prague is currently designing reflector elements containing stainless steel in order to provide measurable characteristics that can be compared to calculations realized by either Monte-Carlo codes or macroscopic core simulators. This article summarizes the methodology of development of the reflector assemblies to improve their similarity with the VVER-1000 reflector. The impact of the evaluated nuclear data is assessed. Further improvements of the proposed design is necessary to reach better agreement with the neutron spectrum in VVER-1000 reactor reflectors. The influence of evaluated data on the global characteristics was found negligible.

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

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2020

Confidentiality

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

Article name in the collection

ND 2019: International Conference on Nuclear Data for Science and Technology

ISBN

978-2-7598-9106-1

ISSN

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e-ISSN

—

Number of pages

4

Pages from-to

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Publisher name

EPJ Web of Conferences

Place of publication

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Event location

Beijing

Event date

May 19, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000627114700158