发明名称 |
Grid spacer and method of making same. |
摘要 |
A marked reduction in the pressure drop of cooling liquid through a grid spacer of a nuclear fuel assembly is attained by convexly contouring the upstream (usually the lower) edges (32) of the grid members. Preferably, they are made streamlined or semicylindrical. This can be done by first beveling and then etching them, by directing a stream of mixture of abrasive and an organic polymer against them, or by traversing an electron or laser beam along them at a power and velocity such as to cause local melting. A lesser improvement is secured by beveling along. A still further improvement can be obtained by also tapering the downstream (usually upper) edges (34). |
申请公布号 |
EP0273183(A2) |
申请公布日期 |
1988.07.06 |
申请号 |
EP19870117113 |
申请日期 |
1987.11.19 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT BERLIN UND MUNCHEN |
发明人 |
KING, PETER;PATTERSON, JOHN F.;YATES, JACK;BROWN, CHARLES |
分类号 |
G21C3/34;G21C3/356;(IPC1-7):G21C3/34 |
主分类号 |
G21C3/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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