초록 ▼

A fuel assembly for a boiling water reactor which is designed to allow water, during operation of the reactor, to flow upwards through the fuel assembly while absorbing heat from a plurality of fuel rods, whereby part of the water is transformed into steam. The fuel assembly comprises a first steam

A fuel assembly for a boiling water reactor which is designed to allow water, during operation of the reactor, to flow upwards through the fuel assembly while absorbing heat from a plurality of fuel rods, whereby part of the water is transformed into steam. The fuel assembly comprises a first steam pipe (10a) arranged with its longitudinal axis parallel to the longitudinal axis of the fuel assembly and the steam pipe comprises an inlet for the steam arranged in the first end of the steam pipe and an outlet for the steam arranged in the second end of the steam pipe. The fuel assembly also comprises a second steam pipe (10b) arranged above and at a distance from the first steam pipe such that an opening is formed between the steam pipes. The outlet of the first steam pipe has a diameter which is larger than the diameter of the inlet of the second steam pipe.

대표청구항 ▼

1. A fuel assembly for a boiling water reactor adapted during operation of the reactor to allow coolant to flow upwards through the fuel assembly while absorbing heat from a plurality of fuel rods to transform a portion of the water into steam, said fuel assembly comprising:a first steam pipe arrang

1. A fuel assembly for a boiling water reactor adapted during operation of the reactor to allow coolant to flow upwards through the fuel assembly while absorbing heat from a plurality of fuel rods to transform a portion of the water into steam, said fuel assembly comprising:a first steam pipe arranged with a longitudinal axis parallel to a longitudinal axis of the fuel assembly, wherein the first steam pipe comprises an inlet for the steam arranged in a first end of the first steam pipe, and an outlet for the steam arranged at a second end of the first steam pipe; a second steam pipe arranged above and spaced from the first steam pipe along the longitudinal direction of the fuel assembly such that an opening is formed between the first and second steam pipes, wherein the outlet of the first steam pipe has an outlet diameter which is larger than an inlet diameter of the inlet of the second steam pipe, wherein fuel rods are arranged laterally with respect to said first and second steam pipes in said fuel assembly, wherein a second end of the second steam pipe comprises means for collecting water on an inside of the second steam pipe and conducting the collected water towards the outlet of the second steam pipe.