| 摘要 |
A nuclear reactor fuel assembly having flow modulators in the form of mixing vanes (28) and/or flow deflectors. The flow modulators are formed in substantially planar intersecting grid strips and have portions (28a) which have been cold-worked by shot peening on one side. Under neutron flux, the cold-worked portion (28a) preferentially expands forcing a bending of the flow modulator with increased reactor life. This concurrently causes an increase in pressure drop across the fuel assembly over the fuel assembly life. |
