Experts clash over HALEU-Th fuel for Indian nuclear reactors, Pg11

Key Highlights:

• A Current Science study evaluating different uranium mixes concluded that HALEU-thorium is unsuitable for India's current nuclear reactors.
• Clean Core Thorium Energy (CCTE), led by Mehul Shah, developed a HALEU-Th fuel called ANEEL, reporting high burn-up in U.S. tests.
• The study found HALEU-Th yielded the highest burn-up (50 GWd/t) and least spent fuel but could reduce the effectiveness of shutdown rods.
• Former DAE chairman Anil Kakodkar disputes the study's conclusions, advocating for HALEU-Th testing in Indian reactors.

Detailed Insights:

• The Current Science study modeled the performance of PHWRs with natural uranium, slightly enriched uranium, and HALEU-Th, finding HALEU-Th produced the most energy and least waste.
• Critics argue the study is misleading because HALEU-Th fuel is not designed for reprocessing, unlike the other fuel types compared in the research.
• Anil Kakodkar believes current Indian PHWRs require minimal modification to use HALEU-Th, supporting its potential for India's nuclear energy goals.
• Concerns exist regarding India's reliance on imported HALEU, as the country is commissioning its fast breeder reactor to produce plutonium for future thorium reactors.
• The debate highlights differing views on the optimal path for India's nuclear program, balancing the use of indigenous thorium resources with imported fuel options.

Key Concepts Involved:

• HALEU (High-Assay Low-Enriched Uranium): Uranium enriched between 5% and 20% with uranium-235.
• Burn-up: A measure of how much energy is extracted from nuclear fuel.
• PHWR (Pressurized Heavy Water Reactor): A type of nuclear reactor that uses heavy water as its coolant and moderator.