| 摘要 |
<p>A spacer (18) for maintaining a pressure tube (12) in spaced relation with a calandria tube of a nuclear reactor. The spacer comprising a split ring (20) adapted to be disposed about the outer surface of said pressure tube. The ring has a central annular body portion (21) with a raised bearing surface (22) thereon adapted to contact the inner surface of said calandria tube and prevent contact between said outer surface and said inner surface. An annular land (24, 26) projecting from each side of said central body portion is adapted to receive a collar (30, 32) thereon effective to create an interference fit between said ring and said pressure tube and thereby constrain axial movement of said spacer on said pressure tube. The spacer of the present invention maintains its location on the pressure tube and does not suffer the axial movement which characterizes some conventional spacers. The bearing surface can have a coating to reduce ware and heat transfer.</p> |
