SAFETY EVALUATION REPORT Docket No. 71-9186 Model No. S-6213 Power Unit Shipping Container Certificate of Compliance No. 9186 Revision No. 15 SUMMARY

accordance with regulations in 10 CFR Part 71 and as stated in the current CoC, unless the package Safety Analysis Report is updated for the current applicable requirements. In the amendment request, the applicant requested to change the Package Identification Number Suffix designation to B(U)F-96. In accordance with 10 CFR 71.19(e), the applicant submitted information to show that the package meets the current regulatory requirements. To support the request, the applicant provided a fracture toughness evaluation to show compliance with the applicable changes from B ()F to B(U)F. The applicant also provided an evaluation of the package to the revised 10 CFR Part 71 regulations to justify the “-96 ” designation. Based on the statements and representations in the application, and for the reasons stated in this Safety Evaluation Report, the staff finds that these changes do not affect the ability of the package to meet the requirements of 10 CFR Part 71. EVALUATION FOR THE UNILATERAL (“U”) DESIGNATION In the amendment request, the applicant requested to change the Package Identification Number suffix designation to B(U)F-96. With respect to this package design, the change in the regulatory requirements for Fissile Type B Packages to a Unilateral (“U”) designation, is the evaluation of the material fracture toughness for the package construction materials, considering the initial conditions temperatures described in 10 CFR 71.73(b). The applicant submitted a material fracture toughness evaluation in accordance with the current regulator