9015/B( )F

MODEL NO. TN-8 AND TN-8L. LEAD, STEEL AND RESIN-SHIELDED IRRADIATED FUEL SHIPPING CASKS. THE CASKS APPROXIMATES A RIGHT CIRCULAR CYLINDER 1,718 mm IN DIAMETER AND 5,516 mm LONG. . THE CAVITY CONSISTS OF THREE STAINLESS STEEL SQUARE PRESSURE VESSELS WELDED TO AN END PLATE AND A CIRCULAR STEPPED TOP FLANGE, SEPARATED BY A T-SHAPED COPPER PLATE AND SURROUNDED WITH B4C + CU PLATES. EACH CAVITY IS 230 X 230 mm AND 4,280 mm LONG. THE MAIN SHIELDING CONSISTS OF 135 mm OF LEAD, 26 mm AND 150 mm OF RESIN. A WET CEMENT LAYER IS LOCATED BETWEEN THE LEAD AND THE OUTER SHELL. RADIAL COPPER FINS ARE WELDED TO THE OUTER SHELL AND COVER THE SURFACE OF THE CASK BETWEEN EACH END DRUM. THE MODEL NO. TN-8 HAS 150 ROWS OF FINS AND THE MODEL NO TN-8L HAS 104 ROWS OF FINS. THE LID IS A WELDED STAINLESS STEEL SHELL CONTAINING LEAD AND RESIN SHIELDS. THE PRESSURE VESSELS ARE CLOSED AND SEALED BY SIXTEEN, 1 -1/4-INCH DIAMETER BOLTS AND TWO SILICONE RUBBER OR VITON O-RINGS LOCATED WITHIN RECESSED GROOVES ON THE TOP FLANGE. EACH EXTREMITY OF THE CASK IS SURROUNDED BY CIRCULAR STAINLESS STEEL DRUMS REINFORCED BY RADIAL GUSSET PLATES AND FILLED WITH BALSA WOOD. A DISK SHAPED IMPACT LIMITER, CONSTRUCTED OF CARBON STEEL AND BALSA WOOD, IS FASTENED TO EACH DRUM WITH FOUR, 1-1/4-INCH BOLTS. THE VENT AND DRAIN LINES WHICH PENETRATE THE INNER CAVITY ARE EQUIPPED WITH POSITIVE CLOSURES. IN ADDITION, ALL ACCESS PORTS ARE PROTECTED BY THE IMPACT LIMITERS. **SEE CERTIFICATE FOR ADDITIONAL DETAILS***