Initial Site-Specific De-Inventory Report for Big Rock Point Report No.: RPT-3014537-002
2.3 Description of Canisters/Overpacks to be Shipped The inventory of loaded canisters at the BRP ISFSI to be evaluated for shipment includes eight W74s listed in Section 2.2. Prior to shipment, each of these canisters will need to be transferred from the current Storage Cask and loaded into a FuelSolutions TS125 transportation cask. No TS125 casks have been fabricated to date. The TS125 casks are licensed by the NRC for transportation of the BRP SNF under CoC 71-9276, which expires on October 31, 2017 (refer to Section 10.0). According to the CoC, which is a -85 certificate, fabrication of new packaging is not authorized. In addition, the CoC only lists SNF as allowable content and therefore the GTCC LLW at BRP is not currently licensed for transportation (see Section 10) [14] . To use the TS125 cask to transport the BRP SNF and GTCC LLW, the CoC will need to be amended to comply with the current -96 requirements and also to include the BRP GTCC LLW as an allowable content. Once the CoC is upgraded, fabrication of the required number of TS125 casks can commence. Considering that the FuelSolutions TS125 cask is currently only required for the BRP SNF and GTCC LLW, it is recommended to evaluate if another transportation cask would be a viable candidate for transporting the BRP W74 canisters. From a physical capacity standpoint, the following transport casks could be used to transport the W74 canisters: NUHOMS-MP197HB, NAC-UTC, MAGNATRAN, and the HI-STAR 190. While licensing action would be required, it may be a more economical solution to use an alternative cask that will be used at multiple sites (see Section 10). The overall dimensions and weights of the FuelSolutions TS125 transportation cask are shown in Table 2-5. The various components associated with the TS125 cask are depicted in Figure 2-13, while the containment boundary is identified in Figure 2-14. During cask closure operations, the containment boundary seals, shown in Figure 2-14, will need to be replaced for each shipment. Closure operations also involve evacuating the cask cavity, backfilling with helium, and performing a helium leak detection leak test on the seals. This will involve the use of a port test tool, depicted in Figure 2-16, to open and close the vent and drain ports (see Figure 2-15) without breaking containment. TABLE 2-5: TS125 TRANSPORT CASK DETAILS [16] Attribute TS125 Transport Cask Capacity (canisters) 1 Maximum Weight (lbs.)
Cask Body
153,424
Closure Lid
7,362
Loaded, without Impact Limiters
242,831
Loaded, with Impact Limiters
285,000
Thermal
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Initial Site-Specific De-Inventory Report for Big Rock Point May 10, 2017
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