Low-Yield, Submarine-Launched Nuclear Warhead: Overview of the Expert Debate [Updated January 10, 2020] [open pdf - 440KB]
From the Document: "The Trump Administration is developing a new low-yield version of the W-76 warhead for existing submarinelaunched Trident II (D-5) missiles. Unclassified sources state that the current W76-1 warhead has an explosive yield of around 100 kilotons. The National Nuclear Security Administration (NNSA) has said the low-yield version, the W76-2, would be configured 'for primary-only detonation.' This could mean a yield of less than 10 kilotons. Congress appropriated $65 million for work on the W76-2 warhead in FY2019 and $10 million to complete the work in FY2020. NNSA completed the first modified warhead in February 2019 and planned to begin delivering warheads to the Navy by late 2019. Congress provided the Navy with $19.6 million in the FY2020 NDAA [National Defense Authorization Act] (P.L. 116-92) to begin integrating the warhead into the submarine force. NNSA has not disclosed the total number of planned W76-2 warheads, although it is expected to be a very small portion of the W76 stockpile (estimated, in unclassified sources, to be around 1,300 total warheads)."
CRS In Focus, IF11143
Congressional Research Service: https://crsreports.congress.gov/