Reactivity measurement using pulsed neutron source methods on VR-1 and VR-2 reactors and their verification by SERPENT code

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00383410" target="_blank" >RIV/68407700:21340/25:00383410 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.anucene.2025.111432" target="_blank" >https://doi.org/10.1016/j.anucene.2025.111432</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.anucene.2025.111432" target="_blank" >10.1016/j.anucene.2025.111432</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Reactivity measurement using pulsed neutron source methods on VR-1 and VR-2 reactors and their verification by SERPENT code

Popis výsledku v původním jazyce

A series of pulse experiments were carried out on the VR-1 reactor and the newly constructed subcritical VR-2 assembly at the Czech Technical University (CTU) in Prague. The objective was to compare the results obtained from the pulse methods with the verified Monte Carlo (Serpent) model for VR-1 reactor and to investigate the potential for the process of experimental verification of the Monte Carlo model for the new VR-2 reactor. The Simmons-King's, Sj & ouml;strand's, Gozani's, and Garelis-Russell's methods were applied to data collected from detectors located at different positions in a pulse experiment. Additionally, the Monte Carlo method was employed for the determination of the kinetic parameters essential for the comparison and application of the pulse methods. A very simple Serpent simulation of the Sj & ouml;strand's method was introduced. Although the used pulse source in some of its parameters (frequency, duty factor) indicated a certain limit of applicability, the expected, relatively good agreement between the experiment and the Monte Carlo model was achieved in the investigated range of reactivities for the VR-1 reactor. Therefore, it can be concluded that pulse methods in this range provide a reasonably reliable means of determining reactivity. The discrepancies observed at the VR-2 subcritical assembly indicate the necessity for a rigorous review of its existing Monte Carlo model.

Název v anglickém jazyce

Reactivity measurement using pulsed neutron source methods on VR-1 and VR-2 reactors and their verification by SERPENT code

Popis výsledku anglicky

A series of pulse experiments were carried out on the VR-1 reactor and the newly constructed subcritical VR-2 assembly at the Czech Technical University (CTU) in Prague. The objective was to compare the results obtained from the pulse methods with the verified Monte Carlo (Serpent) model for VR-1 reactor and to investigate the potential for the process of experimental verification of the Monte Carlo model for the new VR-2 reactor. The Simmons-King's, Sj & ouml;strand's, Gozani's, and Garelis-Russell's methods were applied to data collected from detectors located at different positions in a pulse experiment. Additionally, the Monte Carlo method was employed for the determination of the kinetic parameters essential for the comparison and application of the pulse methods. A very simple Serpent simulation of the Sj & ouml;strand's method was introduced. Although the used pulse source in some of its parameters (frequency, duty factor) indicated a certain limit of applicability, the expected, relatively good agreement between the experiment and the Monte Carlo model was achieved in the investigated range of reactivities for the VR-1 reactor. Therefore, it can be concluded that pulse methods in this range provide a reasonably reliable means of determining reactivity. The discrepancies observed at the VR-2 subcritical assembly indicate the necessity for a rigorous review of its existing Monte Carlo model.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

—

Návaznosti

—

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Annals of Nuclear Energy

ISSN

0306-4549

e-ISSN

1873-2100

Svazek periodika

219

Číslo periodika v rámci svazku

September

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

16

Strana od-do

1-16

Kód UT WoS článku

001473959400001

EID výsledku v databázi Scopus

2-s2.0-105002767142