Measurement of the High Energy Gamma Spectrum Up to 13 MeV in the Special Core of the LR-0 Reactor

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F24%3AN0000135" target="_blank" >RIV/26722445:_____/24:N0000135 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.ans.org/pubs/proceedings/article-55503/" target="_blank" >https://www.ans.org/pubs/proceedings/article-55503/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.13182/PHYSOR24-43553" target="_blank" >10.13182/PHYSOR24-43553</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of the High Energy Gamma Spectrum Up to 13 MeV in the Special Core of the LR-0 Reactor

Popis výsledku v původním jazyce

The reactor gamma spectrum is formed by superposition of various emission sources, which are mainly discrete gammas from thermal capture and inelastic reactions on fuel, water and structural reactor materials and continuous prompt fission gamma spectrum (PFGS) of fissile materials present in fuel, namely 235U and 238U. The inelastic and capture gammas accompanying neutron interactions with structural components have energies below 10 MeV. Thus, the spectrum above 10 MeV is formed by fission gammas. It means, that above 10 MeV the gamma spectrum in the special core is expected to be nearly identical with evaluated 235U(nth., fiss) PFGS, as 235U fission is causing more than 95 % of fissions and shape of prompt fission gamma spectrum of 235U(nth., f) and 238U(n,f) are comparable. It is worth noting that in the special core the neutron spectrum above 6 MeV is nearly identical with the 235U(n_th., f) prompt fission neutron spectrum and the gamma spectrum above 10 MeV is nearly identical with the 235U(nth., f) PFGS. The measurement was performed using a stilbene spectrometer 45 mm × 45 mm and newly developed and well-validated gamma response matrix.

Název v anglickém jazyce

Measurement of the High Energy Gamma Spectrum Up to 13 MeV in the Special Core of the LR-0 Reactor

Popis výsledku anglicky

The reactor gamma spectrum is formed by superposition of various emission sources, which are mainly discrete gammas from thermal capture and inelastic reactions on fuel, water and structural reactor materials and continuous prompt fission gamma spectrum (PFGS) of fissile materials present in fuel, namely 235U and 238U. The inelastic and capture gammas accompanying neutron interactions with structural components have energies below 10 MeV. Thus, the spectrum above 10 MeV is formed by fission gammas. It means, that above 10 MeV the gamma spectrum in the special core is expected to be nearly identical with evaluated 235U(nth., fiss) PFGS, as 235U fission is causing more than 95 % of fissions and shape of prompt fission gamma spectrum of 235U(nth., f) and 238U(n,f) are comparable. It is worth noting that in the special core the neutron spectrum above 6 MeV is nearly identical with the 235U(n_th., f) prompt fission neutron spectrum and the gamma spectrum above 10 MeV is nearly identical with the 235U(nth., f) PFGS. The measurement was performed using a stilbene spectrometer 45 mm × 45 mm and newly developed and well-validated gamma response matrix.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

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

Projekt

<a href="/cs/project/LM2023041" target="_blank" >LM2023041: České mezinárodní centrum výzkumných reaktorů</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

International Conference on Physics of Reactors (PHYSOR 2024)

ISBN

979-8-3313-0130-9

ISSN

—

e-ISSN

—

Počet stran výsledku

8

Strana od-do

306-313

Název nakladatele

—

Místo vydání

—

Místo konání akce

San Francisco, USA

Datum konání akce

21. 4. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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