Mechanical Analysis of a Test Fuel Assembly for a Reactor with Supercritical Water
The High Performance Light Water Reactor (HPLWR) is a design study of a Supercritical Water-Cooled Reactor (SCWR) for which a fuel assembly test is planned to validate the preliminary design with experimental results. A conceptual design of such test assembly contains four fuel pins of 600 mm length and 8 mm diameter arranged in a square assembly box to simulate the basic design features. The temperature distribution of fuel rods is not only a cause of concern for corrosion, but also for unacceptable thermal deformations and stresses. Therefore, the internal parts, I.e. Fuel pins and the fuel assembly box were modeled and analyzed with the Finite Element Software ANSYS Workbench 12.0. Unacceptable bending of the fuel pins has been predicted if the test section is built without spacers. To limit fuel pin deformations, a spacer concept with wire wraps, similar to the HPLWR concept, is introduced. Further analyses quantify the mechanical interaction of the wire wraps with the fuel pins and indicate locations of maximal deformations and stresses. For an assumed total assembly power of 100 kW, the stresses exceed the yield strength, whereas a reduced power of around 50 kW should result in acceptable stresses and deformations.
Fuel rod deformations stress analyses supercritical water reactor fuel qualification test
P. Kremers T. Schulenberg H. Herbell
Karlsruhe Institute of Technology D-76021 Karlsruhe, Germany EnBW Kernkraft GmbH Philippsburg, Germany
国际会议
上海
英文
1272-1282
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）