9023

MODEL NLI-10/24. A LEAD, WATER, DEPLETED URANIUM AND HIGH TEMPERATURE POLYMER SHIELDED SHIPPING CASK, ENCASED IN STAINLESS STEEL, EQUIPPED WITH BALSA IMPACT LIMITERS, AND MOUNTED TO A RAILCAR WHICH IS CONSIDERED TO BE AN INTEGRAL PART OF THE PACKAGING FOR NORMAL CONDITIONS OF TRANSPORT. THE CASK BODY IS 204.5 INCHES LONG BY 96 INCHES IN OD. THE PRINCIPAL SHIELDING CONSISTS OF 6 INCHES OF LEAD AND 9 INCHES OF WATER. DEPLETED URANIUM PLATES ARE ENCASED IN THE BOTTOM END FORGING AND CASK INNER CLOSURE HEAD. HIGH TEMPERATURE POLYMER SHEET IS ENCASED IN THE BOTTOM END AND POSITIONED BETWEEN THE INNER AND OUTER CLOSURE HEADS AT THE TOP END. THE LEAD SHIELD IS BONDED BETWEEN 0.75-INCH STAINLESS STEEL INNER SHELL AND A 2-INCH STAINLESS STEEL OUTER SHELL. THE OUTER SHELL IS SURROUNDED BY A 0.75-INCH STAINLESS STEEL WATER JACKET SHELL. THE THREE SHELLS ARE WELDED TO STAINLESS STEEL FORGINGS AT BOTH ENDS. FOUR WATER EXPANSION TANKS ARE MOUNTED TO THE RAILCAR, AND ARE CONNECTED TO THE WATER JACKET BY A FLEXIBLE METAL HOSE. RADIOACTIVE CONTENTS ARE POSITIONED WITHIN THE CONTAINMENT CAVITY USING NEUTRON POISONED ALUMINUM BASKETS AND INTERNAL SUPPORT STRUCTURES. THE PWR AND BWR FUEL BASKET CAVITIES ARE LINED WITH NEUTRON ABSORBER SLEEVES COMPOSED OF A SILVER-INDIUM-CADMIUM (80-15-5 W/O) ALLOY. AUXILIARY COOLING SYSTEM MOUNTED TO RAILCAR, USED TO MAINTAIN THE CASK AND FUEL TEMPERATURES TO FACILITATE HANDLING AND COOLDOWN.