Zobrazeno 1 - 10
of 31
pro vyhledávání: '"J.K.-H. Karlsson"'
Publikováno v:
Journal of Nuclear Materials. 507:267-275
Experiments have been performed on a Zircaloy-2 sheet material to evaluate nanoindentation as a technique for measuring the Young’s modulus and hardness of the nuclear material. Room temperature transverse and longitudinal mechanical properties of
Autor:
K.O. Kese, J.K.-H. Karlsson, Esteban Broitman, W. Grünewald, D. Jädernäs, U.D. Hangen, A.-M. Alvarez
Publikováno v:
Journal of Nuclear Materials. 531:152013
A single hydride platelet and the matrix material next to it in a Zircaloy-2 cladding have been targeted for hardness, H, and Young’s modulus, E, measurement using nanoindentation. The results were compared with those obtained in the matrix materia
Publikováno v:
Progress in Nuclear Energy. 43:289-296
At the Studsvik research reactor R2, a Boiling Capsule (BOCA) is used for long-term irradiation of BWR and PWR fuel rods. The BOCA experiment consists of a pressurised container that can hold a number of fuel rods in a bundle type configuration. The
Publikováno v:
Nuclear Engineering and Design. 205:91-105
During the last 15 years, the problem of BWR instabilities has attracted the attention of a number of researchers. In 1996, an unusual instability event occurred at Forsmark-1 in which superimposed on the classical, fundamental spatial mode oscillati
Publikováno v:
Kerntechnik. 65:227-235
The neutron noise, induced by a rod manoeuvring experiment in a pressurized water reactor, has been calculated by the incore fuel management code SIMULATE. The space- and frequency-dependent noise in the thermal group was calculated through the adiab
Autor:
J.K.-H. Karlsson, Imre Pázsit
Publikováno v:
Annals of Nuclear Energy. 27:43-62
In a previous publication, a 2-D reactor model was introduced which contained a partially inserted thin absorber. Both the static flux, as well as the noise induced by the vertical oscillations of the rod were calculated by analytical methods. In thi
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 438:345-355
We have performed laboratory measurements of the neutron flux and its gradient in a static model experiment, similar to a model problem proposed in Pazsit (Ann. Nucl. Energy 24 (1997) 1257). The experimental system consists of a radioactive neutron s
Autor:
I. Pázsit, J.K.-H. Karlsson
Publikováno v:
Annals of Nuclear Energy. 26:1183-1204
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 432:403-409
The spatial dependence of thermal and fast neutron flux was measured axially in the core of a 1 MW research reactor. The measurements were made by a thin optical fibre detector with a neutron sensitive ZnS(Ag) scintillation tip. For thermal neutrons
Autor:
Imre Pázsit, J.K-H. Karlsson
Publikováno v:
Annals of Nuclear Energy. 26:157-171
In conceptual and model studies of neutron noise and diagnostics, and even in most practical applications, simple homogeneous reactor models have been used so far, in which closed form analytical solutions are possible. In this paper a less trivial,