SAMDT 3405 — To require a plan to modernize the nuclear security enterprise.

AMENDS

AMENDMENT PROGRESS

STEP 3 OF 3

Proposed

Considered

Disposed

Proposed
Considered
Disposed

DISPOSITION

ADOPTED

OCT 9, 2025

“Amendment SA 3405 agreed to in Senate by Voice Vote.”

what this changes

This amendment requires the government to create a formal plan to update and modernize the facilities used to maintain the nation's nuclear weapons. It ensures that the laboratories and production sites responsible for nuclear security have a clear roadmap for upgrading their aging infrastructure and technology.

WHY IT MATTERS

Many of the facilities used for nuclear security were built during the Cold War and are outdated; this amendment ensures there is a formal strategy to keep these critical sites safe, secure, and technologically current.

WHO IS AFFECTED

This primarily affects the National Nuclear Security Administration (NNSA), employees at national laboratories, and defense contractors involved in nuclear infrastructure.

AMENDS

S 2296PASSED SENATE

National Defense Authorization Act for Fiscal Year 2026

OTHER AMENDMENTS TO THIS BILL

KEY POINTS

low

Requirement for a formal plan

It forces the government to document exactly how it intends to upgrade nuclear facilities rather than leaving it to general policy.

low

Infrastructure focus

Ensures that the physical buildings and equipment used to manage nuclear materials are safe and reliable.

low

Long-term security

Modernization is intended to ensure the U.S. nuclear stockpile remains effective without the need for explosive testing.

GLOSSARY

Nuclear Security Enterprise: The network of national laboratories, manufacturing plants, and testing sites that maintain the U.S. nuclear weapons stockpile.
Modernization: The process of updating old buildings, equipment, and computer systems to meet modern safety and performance standards.

Official sources

SAMDT 3405 on Congress.gov

This analysis used: Amendment purpose · Latest action · Amended bill: summary

ACTION TIMELINE

6 EVENTS

OCT 9, 25

Amendment SA 3405 agreed to in Senate by Voice Vote.

FLOOR

OCT 9, 25

Amendment SA 3405 proposed by Senator Wicker for Senator Cornyn to Amendment SA 3748. (consideration: CR S7074-7086)

FLOOR

OCT 9, 25

Senate amendment proposed (on the floor): Amendment SA 3405 proposed by Senator Wicker for Senator Cornyn to Amendment SA 3748.

FLOOR

OCT 9, 25

Senate amendment agreed to: Amendment SA 3405 agreed to in Senate by Voice Vote.

FLOOR

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To require a plan to modernize the nuclear security enterprise.

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To require a plan to modernize the nuclear security enterprise.

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To require a plan to modernize the nuclear security enterprise.

AMENDS

SUMMARY

KEY POINTS

SPONSORSHIP

ACTION TIMELINE

AMENDMENT INFO

READER REACTIONS

Discussion

To require a plan to modernize the nuclear security enterprise.

AMENDS

AMENDMENT PROGRESS

DISPOSITION

WHY IT MATTERS

WHO IS AFFECTED

KEY POINTS

GLOSSARY

Official sources

ACTION TIMELINE

SPONSORS

READER REACTIONS

What do you think?

Discussion