Hearings to examine proposed budget estimates and justification for fiscal year 2027 for the National Nuclear Security Administration

Defense Posture and Global ThreatsSenate Appropriations Subcommittee on Energy and Water Development · 2026-04-29 · 119th Congress
The Senate Appropriations Subcommittee on Energy and Water Development convened to examine the National Nuclear Security Administration's fiscal year 2027 budget request of $32.8 billion, a roughly 30-35% increase driven largely by weapons modernization spending. Begins at 0:15:54
Transcript
Highlights

Title

NNSA fiscal year 2027 budget request and nuclear modernization oversight

Purpose

The Senate Appropriations Subcommittee on Energy and Water Development convened to examine the National Nuclear Security Administration's fiscal year 2027 budget request of $32.8 billion, a roughly 30-35% increase driven largely by weapons modernization spending. Chair Kennedy and Ranking Member Murray questioned NNSA Administrator Brandon Williams and his deputies on plutonium pit production, cost overruns, workforce hiring after DOGE-era cuts, nonproliferation funding cuts, and broader strategic deterrence policy. Begins at0:15:54

Who spoke

Chair John Kennedy (R-LA)0:15:54: Opened by noting the 35% budget increase focused on modernizing nuclear weapons to keep pace with China0:16:24, and closed with an extended discussion of great-power competition among China, Russia, and Iran, questioning whether two plutonium pit facilities are needed and how to retain talent against private-sector pay1:22:161:22:47.

Sen. Patty Murray (D-WA), Ranking Member0:18:18: Criticized the budget as lopsided, boosting weapons spending while cutting nonproliferation programs0:19:19; pressed Napoli on rehiring after DOGE layoffs and Williams on whether FY26 congressionally directed funds were being reprogrammed0:33:370:34:43; later questioned Beck on how the pit production transformation strategy will be reflected to the committee1:02:101:05:17.

Sen. Ed Markey (D-MA)0:23:13: Deferred his opening statement, saying he would hold questions until later.

Brandon Williams, NNSA Administrator0:24:15: Said every weapon program is on or ahead of schedule and the budget supports full triad modernization0:25:49; described root causes of cost overruns as poorly defined requirements, a risk-averse culture, and lack of accountability0:44:370:45:080:45:38; discussed strategic deterrence theory regarding tactical nuclear use by Putin or Xi0:50:59; said NNSA plans to hire about 100 new personnel0:34:49.

David Beck, Deputy Administrator for Defense Programs0:38:13: Addressed Los Alamos housing shortages and an ongoing campus study due later in summer0:38:42; discussed fusion partnerships with private companies including Z-machine upgrades0:40:50; detailed the pit production transformation effort, saying Los Alamos will triple its first-half pit output by year-end while Savannah River won't be ready until the 2030s1:03:291:04:30.

Matthew Napoli, Deputy Administrator for Defense Nuclear Nonproliferation0:23:41: Described NNSA's capabilities to deny, detect, and defeat nuclear/radiological threats, citing removals from Kazakhstan, Libya, Iraq, University of Georgia, and Lebanon0:29:350:30:36; said South Carolina became the 13th state cleared of certain material0:59:13; argued allied confidence in U.S. extended deterrence is the best nonproliferation tool1:14:59.

Sen. Martin Heinrich (D-NM)0:35:49: Asked about Los Alamos housing solutions0:36:20 and a stalled hexavalent chromium cleanup dispute affecting Pueblo drinking water near Los Alamos0:38:42; also raised fusion energy partnerships0:40:08 and the CREST reactor modernization project at Sandia1:10:43.

Sen. Bill Hagerty (R-TN)0:41:33: Cited a GAO February 2026 report showing NNSA cost overruns grew from $2.1 billion in 2023 to $4.8 billion in 2025, mostly tied to uranium processing facilities0:42:49; asked Williams for root causes and fixes0:43:19.

Sen. John Hoeven (R-ND)0:47:22: Asked about the air-launched cruise missile replacement (LRSO) and Sentinel ICBM warhead schedules0:47:22; pressed on whether the budget is adequate and whether reconciliation funding is coming0:49:33; asked why triad investment is vital to national security0:50:30.

Sen. Jeff Merkley (D-OR)0:53:21: Questioned whether $5 billion a year for new plutonium pits is scientifically justified given lab studies showing no degradation in older pits, calling it possibly "a whopper of a subsidy"0:54:180:54:46; asked why the budget cuts $135 million from the Global Security account for securing nuclear materials worldwide1:01:16.

Key moments

Williams stated the FY2027 NNSA budget request is $32.8 billion, framed as supporting "peace through atomic strength" and full triad modernization0:25:160:25:49.

Hagerty cited a GAO report showing NNSA major construction project cost overruns rose from $2.1 billion (2023) to $4.8 billion (2025), with seven projects exceeding 20% overruns, mostly tied to uranium processing facilities0:42:490:43:19.

Murray pressed Williams on whether hundreds of staff cut under DOGE had been rehired and what it cost taxpayers; Williams said that occurred before his September confirmation and he lacked the figures0:35:130:35:240:35:31.

Merkley challenged the plutonium pit production program's cost and necessity, citing Lawrence Livermore and Los Alamos studies finding no degradation in aged pits, and asked whether it was a "carefully elevated program based on absolute scientific need"0:53:530:54:46; Williams disputed the characterization, calling it purely scientific necessity0:54:46.

Beck said Los Alamos will triple its first-half-of-year pit production total by year-end, while the Savannah River pit facility will not be ready until the 2030s1:03:581:04:30.

Williams disclosed NNSA spent $600 million last year on AI technologies and capabilities within its mission1:09:43.

Kennedy raised a hypothetical of Japan or the UAE considering their own nuclear weapons absent confidence in U.S. extended deterrence, prompting Napoli to argue that credible American deterrence is "the best argument for not developing their own weapons program"1:13:541:15:21.

Merkley noted a proposed $135 million cut to the Global Security account funding worldwide nuclear material security work; Napoli responded the mission is "scalable" and would remain successful1:01:161:01:34.

Williams said NNSA is roughly 3% of the Department of Defense budget, down from 6% during the Cold War, and argued for proportional increases if defense spending rises0:46:480:50:08.

Kennedy closed by questioning whether two plutonium pit production facilities are truly needed and stressed there is "not a penny to waste," while urging the administrators not to quit over frustrations1:22:471:23:48.

Metadata

CommitteeSenate Appropriations Subcommittee on Energy and Water Development
Chamber / CongressSenate · 119th Congress
Date2026-04-29
TypeOpen Hearing
Witnesses
(none listed in event metadata)
Videosenate-isvp
Transcript198 caption blocks · 9,282 words · 1:25:35 runtime
EventCongress.gov 338352