scholarly journals Brazing of AM-350 stainless steel LWBR fuel rod support grids (LWBR Development Program)

1979 ◽  
Author(s):  
L.P. Ebejer
Keyword(s):  
Stainless Steel ◽  
Development Program ◽  
Fuel Rod

scholarly journals Numerical investigations of stainless steel melt motions on the surface of uranium dioxide

2019 ◽  
Vol 196 ◽  
pp. 00005 ◽  
Author(s):  
Eduard V. Usov ◽  
Pavel D. Lobanov ◽  
Ilya A. Klimonov ◽  
Alexander E. Kutlimetov ◽  
Anton A. Butov ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Uranium Dioxide ◽  
Momentum Conservation ◽  
Mass Energy ◽  
Numerical Investigations ◽  
Fuel Rod ◽  
The Core ◽  
Fuel Pin ◽  
Energy And Momentum ◽  
Coolant Velocity

The paper contains the results of numerical simulation of stainless steel melt motions on the surface of uranium dioxide. The investigations are performed for purposes of understanding of the fuel rod behavior during the core disruptive accident in the fast reactors. The systems of mass, energy and momentum conservation equations are solved to simulate melt motion on the surface of the fuel pin. Heat transfer and friction between melt and pin's surface and melt and coolant flow are taken into consideration. The dependences of mass of the melt and the features of the melt motion on coolant velocity and contact angle between melt and surface of the fuel rod are presented.

CAP1400 Fuel Assembly Development and PWR Fuel Assembly Technology Progress in China

2017 ◽  
Author(s):  
Libing Zhu ◽  
Jie Ding ◽  
Qin Zhou ◽  
Yunqing Zhou ◽  
Fujun Gan ◽  
...  
Keyword(s):  
Fuel Assembly ◽  
Development Program ◽  
Test System ◽  
Test Facility ◽  
Commercial Application ◽  
Performance Tests ◽  
Fuel Rod ◽  
Fuel Assemblies ◽  
Assembly Technology ◽  
Code Development

In 1990s the first generation of PWR fuel assembly FA300 was developed in China. With constantly design improvements over the following 20 years, three types of FA300 fuel assemblies have been developed with max fuel assembly average burnup reach 40000 MWd/tU and successfully used in 300MWe PWRs. By now over 1100 fuel assemblies of FA300 series have been successfully operated in three different 300MWe PWRs with satisfied operation reliability. The CAP1400 fuel assembly development program was launched in 2010 which includes new zirconium cladding material development, UO2 pellet development, high performance fuel assembly mechanical structure development, fuel rod performance code and fuel assembly seismic analysis code development, out-of-pile fuel assembly test facility construction and in core irradiation program. The main purpose of CAP1400 fuel assembly development program is to meet the needs of self-sufficient fuel supply to CAP1400 reactor. Based on FA300 and CAP1400 fuel assembly development, a full series of PWR Fuel R&D technology and test system has been successfully established by SNERDI which will continuously support the fuel assembly improving and new type of fuel development. This paper will mainly describe the PWR fuel technology including cladding technology, pellet technology, fuel assembly mechanical design technology, fuel assembly test facility and test technology, fuel rod and fuel assembly code development progress. Furthermore, the development progress of CAP1400 fuel assembly will also be introduced. By now two types of new zirconium alloys have been selected as candidate alloys, all of the out-of pile performance tests have been finished. Both two alloys show good corrosion resistance. Through full series of fuel assembly components performance tests, the fuel assembly has finished design finalization. Most of the fuel assembly mechanical and hydraulic tests will be finished by the end of 2016. The test reactor irradiation program and commercial PWR irradiation program are also on the schedule. After the LTA program and commercial application licensing, the CAP1400 fuel assembly is anticipated to provide adequate burnup capability and operation reliability to CAP1400 reactor in China.

scholarly journals Analysis of Computer Modelling Results on Fuel Rods Strength and Condition at Reduced or Absent Cooling Caused by Accident

2021 ◽  
Vol 7 (1) ◽  
pp. 7-16
Author(s):  
Stepan Lys ◽  
Keyword(s):  
Stainless Steel ◽  
Fuel Assembly ◽  
Computer Modelling ◽  
Severe Accident ◽  
Research Centre ◽  
Steel Component ◽  
Spacer Grids ◽  
Fuel Rod ◽  
Standard Problem ◽  
Post Test

The paper describes the phenomenology of fuel rod behaviour in severe accident. As an example, an experiment is described resulting in severe damage of 19 fuel rod assembly of VVER type; it was carried out in the CORA facility in 1993 (Research Centre, Karlsruhe, Germany). Testing conditions and results of post-test investigations of fuel assembly are given. The fuel rod code RAPTA-SFD is briefly dealt with; the code was a participant in the International Standard Problem ISP-36. The basic results are presented acquired by computer modelling CORA-W2 experiment using RAPTA-SFD code. Among the presented experimentally acquired and calculated results, the scope of the data on stainless steel component behaviour is substantial. The tested CORA-W2 fuel assembly contained a significant quantity of steel components, viz., spacer grids, a guide thimble, and a cladding of an absorber element. It is to be borne in mind that the spacer grids and a guide thimble of the updated and upgraded fuel assembly of VVER-1000 are fabricated from Zr-alloy, hence, the relative quantitative characteristics of chemical interactions between materials and stainless steel (Cr-Ni alloy) will be much lower for the up-to-date upgraded fuel assembly under identical conditions.

GIBSON TUBE DUPLEX ALLOY 19D

Alloy Digest ◽  
2002 ◽  
Vol 51 (1) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Tensile Properties ◽  
Stainless Steels ◽  
Chromium Content ◽  
Development Program ◽  
Duplex Alloy ◽  
Super Duplex Stainless Steels

Abstract Alloy 19D (UNS S32001), Nitronic 19D, is a lean duplex (ferritic-austenitic) stainless steel developed by AK Steel. Compared to conventional duplex and super-duplex stainless steels, alloy 19D has a reduced chromium content, man-ganese is substituted for most of the nickel, and molybdenum is essentially eliminated. Gibson Tube conducted a development program to produce seam-welded 19D tubing. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance. Filing Code: SS-841. Producer or source: Gibson Tube.

scholarly journals Assessment of stainless steel 348 fuel rod performance against literature available data using TRANSURANUS code

2016 ◽  
Vol 2 ◽  
pp. 27
Author(s):  
Claudia Giovedi ◽  
Marco Cherubini ◽  
Alfredo Abe ◽  
Francesco D’Auria
Keyword(s):  
Stainless Steel ◽  
Fuel Rod
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