Data centers are experiencing exponential growth, leading to a significant increase in global electricity consumption, projected to double by 2030, driven largely by AI. This escalating demand highlights a critical energy problem, positioning nuclear power as a viable, clean, always-on, and scalable solution. The analysis introduces a four-tier nuclear stack framework: miners, fuel makers, innovators, and utilities. It evaluates five nuclear ETFs: URA, URNM, URNJ, NLR, and NUKZ. URA offers diversified exposure across all tiers, with a YTD performance of +69.01% and an analyst 12-month target of $53.76. URNM provides pure Tier 1 miner leverage, showing +44.08% YTD, targeting $63.89. URNJ focuses on junior uranium explorers, demonstrating +45.86% YTD, with an analyst target of $35.06. NLR primarily covers established utilities (Tier 4), delivering a +59.95% YTD return and an analyst target of $153.74. NUKZ is positioned as the most balanced exposure across the fuel cycle and advanced reactor design, achieving +60.31% YTD and an analyst target of $73.65. Analyst forecasts generally predict bullish trends for these ETFs over the next 12 months, with target upsides ranging from 9.59% to 25.08%. The inherent risks and opportunities associated with each tier's unique dynamics (supply, demand, innovation, regulation) are emphasized.