Of possible interest to your readers.
Thanks Anonymous. Below is the executive summary. The full report can be downloaded here.
Direct pit reuse, the use of existing pits with no modifications, does not meet all the objectives of the RRW program, but can offer limited improvements in performance margin and surety for some systems. Modifications of existing pits would allow for more margin and surety improvements than direct reuse; this would require some of the same investments in our R&D and manufacturing infrastructure as is required to establish a production capacity for new pits. Using newly manufactured pits offers the most flexibility for improving performance margin, surety, and for meeting all of the goals of the RRW program. The Nuclear Weapons Council believes that a pit production capacity of 50-80 new pits per year is the capacity that should be implemented, consistent with the March, 2008 DoD/DOE white paper. All options for the future stockpile will require investments in the science tools that allow us to assess and certify the stockpile in the absence of nuclear testing.