ALIANCE Project (Russia-China Fusion Neutron Source)

The ALIANCE project is a joint Russia-China collaboration to develop a Gas Dynamic Trap (GDT)-based fusion neutron source. The project represents one of the most concrete examples of Russia-China fusion technology cooperation, bridging Russian plasma physics expertise with Chinese fusion energy ambitions.

Key aspects of ALIANCE:

1. Partners:

• Russian lead: Budker Institute of Nuclear Physics (BINP), Novosibirsk
• Chinese lead: Institute of Nuclear Energy Safety Technology (INEST), Chinese Academy of Sciences (CAS)
• The partnership combines Russian GDT expertise with Chinese fusion infrastructure and funding

2. Technology base — GDT: The ALIANCE project is based on the Gas Dynamic Trap (GDT) developed at Budker BINP. The GDT is an open magnetic mirror system that can produce high fluxes of fusion neutrons. A GDT-based fusion neutron source could serve multiple purposes:

• Materials testing: Fusion neutron damage testing for reactor materials
• Subcritical fission blanket driving: Driving a subcritical fission reactor with fusion neutrons (hybrid fusion-fission)
• Tritium breeding: Producing tritium for fusion fuel

3. Workshop series:

• November 2018: First GDT-FNS Workshop, ASIPP Hefei — initial exploration of cooperation
• November 2019: Second GDT-FNS Workshop, Novosibirsk (BINP) — ALIANCE project jointly proposed
• September 2021: Third GDT-FNS Workshop, Hefei (hybrid) — continued cooperation
• The workshop series represents formal, ongoing Russia-China fusion cooperation

4. May 2026 Xi-Putin summit: The ALIANCE project is likely part of the three nuclear/fusion MoUs signed at the May 2026 Xi-Putin summit. Izvestia reported $6 billion in joint Russia-China nuclear investment. The summit represented a major expansion of Russia-China nuclear and fusion cooperation.

5. Dual-use implications:

• Fusion neutron sources can be used for materials testing (civilian) or weapons simulation (military)
• The GDT technology has both energy and weapons applications
• China's Military-Civil Fusion policy means ALIANCE technology could flow to military applications
• Russia's VNIIEF and other weapons labs have expertise in neutron source technology
• The fusion-fission hybrid concept (using fusion neutrons to drive fission) has weapons proliferation implications

6. Connection to Z-FFR: The ALIANCE project is conceptually related to China's Z-FFR (Z-pinch Fusion-Fission Reactor) — both use fusion neutrons to drive a fission blanket. The ALIANCE GDT approach and Z-FFR Z-pinch approach represent different driver technologies for similar hybrid concepts.

7. Strategic significance:

• ALIANCE represents concrete Russia-China fusion technology transfer
• The GDT technology is unique to Russia and attractive to China
• The project supports both civilian fusion energy and potential weapons applications
• The May 2026 MoUs and $6B investment signal major expansion of cooperation
• ALIANCE is part of the broader Russia-China military-technical cooperation framework

The ALIANCE project is a critical node in the Russia-China fusion cooperation network. The GDT-based fusion neutron source concept has both civilian energy and military weapons applications, making it a textbook dual-use technology. The May 2026 Xi-Putin summit MoUs likely build on the ALIANCE framework, representing a major expansion of Russia-China nuclear and fusion cooperation.