Knowledge Tree
light water reactor
Also known as: LWRs, light water reactor, light water reactors, light water reactor technology
Facts (16)
Sources
Nuclear Energy and Climate Change Mitigation everycrsreport.com Apr 1, 2025 7 facts
claimMost currently operating nuclear power plants require uranium fuel enriched to approximately 5% U-235 for use in light water reactors (LWRs).
referenceThe U.S. Department of Energy (DOE) published the 'Quadrennial Technology Review 2015', which includes a chapter on light water reactors as part of its assessment of clean electric power technologies.
referenceIn commercial Light Water Reactors (LWRs), the reactor core is located in a large steel pressure vessel filled with ordinary water, where U-235 nuclei fission to release energy and neutrons, sustaining a nuclear chain reaction.
measurementA University of California study estimated that a 1,600 MW Light Water Reactor (LWR) requires approximately 205,000 cubic meters of concrete and 71,000 metric tons of steel and other metal for construction.
claimNuclear reactors other than light water reactors may use different coolants and moderators.
referenceThe Department of Energy's (DOE) nuclear energy R&D program activities include reactor modeling and simulation, experimental processing of spent nuclear fuel, development of advanced reactor concepts, and testing of accident tolerant fuels for existing light water reactors (LWRs).
referenceLight water reactors (LWRs) use ordinary (light) water for cooling and for moderating (slowing) the neutrons in the nuclear chain reaction.
The Power of Change: Innovation for Development and Deployment ... nationalacademies.org 4 facts
claimAdvanced nuclear reactor designs rely more on passive safety mechanisms than conventional light water reactors, with some concepts approaching 'walkaway' safety where no external intervention is required for safe shutdown.
claimThe current nuclear plant licensing framework, which is administered primarily by the U.S. Nuclear Regulatory Commission (NRC), is tailored specifically to light water reactor technology.
claimThe global light water reactor-based nuclear energy industry is shifting away from the United States, with suppliers in Russia, Korea, and China gaining competitiveness in international markets previously dominated by American, European, and Japanese vendors.
measurementAdvanced nuclear reactor designs vary in output capacity, with some reaching the 1,000 megawatt (MW) range, similar to large conventional light water reactors, while others are compact designs ranging below 50 MW.
What Role Does Nuclear Energy Play in the Race to Net Zero? earth.org Jul 19, 2023 3 facts
measurementNuScale’s light water reactor (LWR) design produces 77 MW of power.
referenceSmall modular reactors (SMRs) produce under 300 MW of power, utilize modular factory construction to reduce costs, and are scalable to meet demand. Examples include NuScale’s 77 MW light water reactor (LWR) design and GE-Hitachi’s 300 MW BWRX-300.
measurementNuScale’s light water reactor (LWR) design is a type of small modular reactor with a capacity of 77 MW.
Role of Advanced Nuclear Energy in Deep Decarbonization onlocationinc.com Oct 20, 2021 1 fact
claimTo achieve accurate modeling outcomes, energy modelers must incorporate advanced nuclear reactor designs with careful consideration for their unique properties and improvements over traditional light water reactors.
Chapter: 5 Beyond Electricity: Nuclear Power's Potential to Play a ... nationalacademies.org 1 fact
referenceK.G. Vedros, R. Christian, and C. Rabiti authored 'Probabilistic Risk Assessment of a Light Water Reactor Coupled with a High Temperature Electrolysis Hydrogen Production Plant' at Idaho National Laboratory in 2020.