| 摘要 |
<p>In a boiling-water fuel element with a central coolant pipe (WR) as the backbone of the bearing frame, upper end section (WE) of the coolant pipe (WR) becomes a relatively slim linking stud (4) engaging through an aperture in the upper rod holder (1) and secured there. Thus the upper end section (WE) lies at the upper edge of the active zone (AZ) and the coolant outlets of the coolant pipe (WR) take the form of passages (8) which are axial or run inwards to the linking stud. This provides good flow conditions, especially low pressure losses, in the upper part of the fuel element.</p> |
