Wyniki wyszukiwania - Biblioteka Nauki

Ten serwis zostanie wyłączony 2025-02-11.

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: SERPENT

Sortuj według:

Ogranicz wyniki do:

Generowanie danych jądrowych metodami Monte Carlo dla deterministycznych kodów obliczeniowych

100%

Stanisz P. S.

tom nr 4

Artykuł ten opisuje generowanie grupowych danych jądrowych takich jak: grupowe przekroje czynne i parametry charakteryzujące kinetykę reaktora, za pomocą metody Monte Carlo (MC) w oparciu o program komputerowy SERPENT. Obliczenia prowadzone są na podstawie projektowanego modelu Europejskiego Reaktora Chłodzonego Sodem (European Sodium Cooled Fast Reactor ESFR), rozwijanego w ramach 7-go Projektu Ramowego CP-ESFR. Wygenerowana baza stałych służy do przeprowadzania analizy stanów awaryjnych, bazując na sprzężeniu przestrzennej kinetyki neutronowej z termo-hydraulicznym modelem. Symulacja taka jest wykonywana za pomocą programu TRACE/PARCS. W celu zapewnienia poprawnności obliczeń wymagany jest zoptymalizowany schemat modelowania. Praca przedstawia testy i weryfikacje obliczeń przeprowadzonych za pomocą programu PARCS wraz z użytymi danymi jądrowymi wygenerowanymi w programie SERPENT. W celu konwersji danych, zostało rozwiniętych kilka skryptów przetwarzających. Przedstawione rezultaty potwierdzają skuteczność obranej metody i przydatność programów do tego typu działań. Otrzymane wyniki pokazują zadowalającą zgodność pomiędzy obliczeniami wykonanymi w programie PARCS wykorzystującym dane przygotowane programem SERPENT, a pomiędzy rezultatami referencyjnymi otrzymanymi metodą MC.

This article describes the generation of multigroup constants using the Monte Carlo code SERPENT for 3D transient analyses for the safety assessment of the European Sodium Cooled Fast Reactor (ESFR) developed within the Euratom 7th Framework Program Project CP-ESFR [12]. The transient analyses are performed using the US-NRC code system TRACE/PARCS based on coupled 3D neutron kinetics and the thermal hydraulics. For transient analyses, the PARCS code uses a linear parametric cross section representation which involves the derivatives of the cross sections. In this representation, reactivity feedback are given by the derivatives of the cross sections. Multigroup group constants, reactivity coefficients and neutron kinetic data were calculated using suitable models of ESFR core and SA by SERPENT. In order to transfer these data to the PARKS code, several post-processing scripts were developed. Several verification and test calculations were performed. The results show in general a good agreement between the MC calculations with the SERPENT code and the deterministic calculations with PARCS using the MC generated multigroup group constants.

DOBRÝ HAD A JELEN. DVA OBRAZY KRISTA V KÁZÁNÍ SVATÉHO AMBROŽE

85%

Vopřada D.

nr 2

238–252

Saint Ambrose (died 397) employs two zoological symbols of Christ to introduce his audience deeper into the mystery of Christ. Firstly, the paper analyses the symbol of the good serpent used by the Bishop of Milan to describe all of the history of salvation from the original purity of the first man, through his fall, the coming and victory of Christ the Saviour to the calling of the Christian faithful to become good serpents who will enter into the glory of Christ, the Good Serpent. Secondly, it studies the image of a deer surrounded by enemies and winning over the serpent, which primarily represents the divine attributes of Christ. Simultaneously, this symbol represents an invitation addressed to the Church of Milan at the end of the 4th century to listen to the voice of Christ when persecuted by those who denied Christ’s divinity. We come to the conclusion that both symbols allowed his audience to understand God’s activity as a present-day reality which the faithful can enter into. At the same time, they embody a means to clarify one of the essential truths of the Christian faith, i.e. that Christ heals humanity poisoned by sin directly in the misery of sin and death which was part of the Milanese Christians’ lives on the level of both social and economic crisis, and in the conflict with other religious groups. Both images exemplify an exhortation as to how to behave in the present-day situation: the faithful, similar to the serpent, are supposed to bring testimony-martyrdom and contemplate the coming of Christ the Word with the acute eyes of a deer.

Simulations of the AP1000-based reactor core with SERPENT computer code

80%

Darnowski P. , Ignaczak P. , Orębski P. , Stępień M. , Niewiński G.

tom Vol. LXV, nr 3

295--325

The paper presents the core design, model development and results of the neutron transport simulations of the large Pressurized Water Reactor based on the AP1000 design.The SERPENT 2.1.29 Monte Carlo reactor physics computer code with ENDF/BVII and JEFF3.1.1 nuclear data libraries was applied. The full-core 3D models were developed according to the available Design Control Documentation and the literature. Criticality simulations were performed for the core at the Beginning of Life state for Cold Shutdown, Hot Zero Power and Full Power conditions. Selected core parameters were investigated and compared with the design data: eﬀective multiplication factors, boron concentrations, control rod worth, reactivity coeﬃcients and radial power distributions. Acceptable agreement between design data and simulations was obtained, conﬁrming the validity of the model and applied methodology.