LLNL PuPS Weld Qualification Plan

摘要

This plan ensures the quality of the Lawrence Livermore National Laboratory (LLNL) DOE 3013 Standard Plutonium Packaging System (PuPS) can welds meet the requirements stipulated in the DOE Standard 3013-00 'Stabilization, Packaging, and Storage of Plutonium-Bearing Materials' (Reference 1) and G-ESR-G-00035, Revision 1 dated July 26, 2000, 'Savannah River Site Stabilization and Packaging Requirements for Plutonium Bearing Materials for Storage.' This plan also meets the requirements for a weld qualification plan as stipulated in the G-ESR-G-00035. The Outer Can weld must meet ASME VIII& IX. The Outer Can welds will be evaluated initially and during production. The initial evaluation will be done by performing the following: ASME IX welding procedure qualification, ASME IX operator qualification, and a 25 can Dummy Outer Can (DOC) verification run. During production, product cans and DOCs will be evaluated. Product cans will be evaluated by a combination of visual examination of the weld faces and the use of helium leak checking. The DOCs will be examined by visual examination, leak check, radiographic examination and metallographic examination. Appendix 2 summarizes the requirements of each of these evaluations. The Inner Can weld must meet the leak tightness requirements of DOE 3013. The Inner Can weld, while not required to meet ASME requirements, will be controlled as described in this plan to ensure a reliable leak path barrier and consistent production processing behavior. The product Inner Cans will be evaluated by a combination of visual examination of the weld faces and the use of helium leak checking.