Indian Polity & Governance·Definition

Nuclear Deal — Definition

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Version 1Updated 5 Mar 2026

Definition

The India-US Nuclear Deal, formally known as the 123 Agreement, is a landmark civilian nuclear cooperation agreement signed between India and the United States in 2008. This deal marked a historic shift in global nuclear diplomacy by allowing India, a non-signatory to the Nuclear Non-Proliferation Treaty (NPT), to engage in civilian nuclear trade with the international community.

The agreement gets its name from Section 123 of the US Atomic Energy Act of 1954, which governs US nuclear cooperation with other countries. The deal was revolutionary because it broke the 34-year nuclear isolation of India that began after its first nuclear test in 1974.

Prior to this agreement, India was excluded from international nuclear commerce due to its refusal to sign the NPT and its nuclear weapons program. The deal required India to separate its civilian and military nuclear facilities, place civilian facilities under International Atomic Energy Agency (IAEA) safeguards, and commit to certain non-proliferation measures.

In return, India gained access to nuclear fuel, technology, and reactors from the US and other Nuclear Suppliers Group (NSG) countries. The agreement faced significant domestic opposition in India, with critics arguing it compromised India's strategic autonomy and nuclear sovereignty.

The Left parties withdrew support from the UPA government over this issue, nearly bringing down the government in 2008. However, supporters argued it was essential for India's energy security, as nuclear power could help meet the country's growing energy demands while reducing carbon emissions.

The deal also symbolized India's emergence as a responsible nuclear power and strengthened the India-US strategic partnership. The agreement covers cooperation in nuclear reactors, nuclear fuel, heavy water production, and nuclear safety.

It allows for the transfer of nuclear materials, equipment, and technology for peaceful purposes. The deal also includes provisions for fuel supply assurances and reprocessing rights, which were crucial for India's acceptance.

The implementation of the deal has led to several nuclear reactor projects in India with US technology, including the Westinghouse AP1000 reactors planned for Andhra Pradesh. The agreement has broader geopolitical implications, positioning India as a key partner in the US strategy for the Indo-Pacific region and balancing China's growing influence.

It also opened doors for nuclear cooperation with other countries like France, Russia, and Japan, making India a significant player in the global nuclear market.

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