CH-TRAMPAC - Waste Isolation Pilot Plant - U.S. Department of ...

CH-TRAMPAC Document Rev. 2, May 20052.9.4 S200 Pipe OverpackThe S200 pipe overpack is a shielded version of the standard pipe overpack described inSection 2.9.2. It consists of a gamma-shield insert located by rigid polyurethane foam dunnageinside a 12-in. diameter pipe component positioned within a 55-gallon drum by means offiberboard/plywood dunnage. A schematic of the S200 pipe overpack is shown in Figure 2.9-6,with detailed descriptions provided in Appendix 1.3.1 of the TRUPACT-II SAR 2 ,Appendix 1.3.1 of the HalfPACT SAR 3 , and Appendix 4.3 of the CH-TRU PayloadAppendices. 1 The 12-in. diameter pipe component used in the S200 pipe overpack is identical tothe 12-in. diameter pipe component described for the standard pipe overpack in Section 2.9.2.The 6-in. diameter pipe component is not used in the S200 pipe overpack. The TRUPACT-IIwill accommodate 14 S200 pipe overpacks (Figure 2.9-2), and the HalfPACT will accommodate7 S200 pipe overpacks (Figure 2.9-3). The 12-in. diameter pipe component dimensions andmaterials of construction are specified in Table 2.9-5 and Table 2.9-6, respectively. The pipecomponent and the overpacking 55-gallon drum must be vented as specified in Section 2.5. Thegamma-shield insert is a lead two-component assembly consisting of a cylindrical body with anintegral bottom cap and a detachable lid. The shield insert is available in two sizes as specifiedin Table 2.9-14. A mixture of S200-A and S200-B pipe overpacks may be assembled into asingle payload.Table 2.9-14 – Shield Insert Nominal DimensionsInsideDiameter(inches)InsideHeight(inches)OutsideDiameter(inches)OutsideHeight(inches)ThicknessSize (inches)S200-A 1.000 8.125 8.125 10.125 10.625S200-B 0.600 8.125 16.125 9.325 17.825The shield insert body, lid, and dunnage materials of construction are specified in Table 2.9-15.Table 2.9-15 – Shield Insert Materials of ConstructionItemBody, lidDunnageMaterialLeadRigid polyurethane foamThe maximum allowable weight of 12-in. diameter pipe component contents (shield insertassembly plus payload) is 225 lbs., and the maximum gross weight of the loaded 12-in. diameterpipe component is 407 lbs., which are consistent with the 12-in. diameter pipe componentweights specified in Table 2.9-7. The maximum allowable gross weight of the loaded S200 pipeoverpack is 547 lbs., which is consistent with the weights specified in Table 2.9-8. Table 2.9-16summarizes the nominal individual and maximum total weights associated with the shield insertassembly components and payload that are applicable to shipment within the TRUPACT-II andthe HalfPACT.2.9-13