Heat exchangers with reinforced fins

Claim 1

A HEAT EXCHANGER FOR LOCATION IN A CONDUIT IN A NUCLEAR REACTOR THROUGH WHICH A HEAT TRANSFER FLUID IS ADAPTED TO A CIRCULATED, COMPRISING: A TUBULAR MEMBER. HAVING A PASSAGE EXTENDING THERETHROUGH FOR RECEIVING A NUCLEAR FUEL ELEMENT THEREIN, THE OUTER SURFACE OF SAID MEMBER BEING OF POLYGONAL CONFIGURATION AS VIEWED IN TRANSVERSE CROSS-SECTION AND PROVIDING A PLURALITY OF IDENTICAL SECTORS ARRANGED THEREAROUND; AND A PLURALITY OF FINS FORMED INTEGRAL WITH SAID MEMBER AND EXTENDING OUTWARDLY SUBSTANTIALLY THE SAME DISTANCE FROM THE SURFACE OF EACH OF SAID SECTORS; THE FINS BEING PARALLEL TO EACH OTHER ON EACH SECTOR AND INCLINED AT AN ANGLE TO THE AXIS OF SAID MEMBER AND IN OPPOSITE DIRECTIONS IN ADJACENT SECTORS SO AS TO FORM A CHEVRON PATTERN, SAID FINS IN EACH OF SAID SECTORS DEFINING THEREBETWEEN CHANNELS FOR THE FLOW OF SAID HEAT TRANSFER FLUID THERETHROUGH, THE ALTERNATE CHANNELS IN EACH OF SAID SECTORS EXTENDING FROM THE OUTER EXTREMITY OF SAID FINS TO THE SURFACE OF THE SECTOR BEING OF A UNIFORM, PREDETERMINED DEPTH AND THE ADJACENT CHANNELS DISPOSED BETWEEN SAID ALTERNATE CHANNELS IN EACH OF SAID SECTORS BEING IN A UNIFORM DEPTH DIFFERENT FROM THE SAID PREDETERMINED DEPTH.