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Lawrence Livermore National Laboratory Weapons and Complex IntegrationWeapon Physics and Design Weapon Technologies and Engineering Weapon Simulation and Computing Inertial Confinement Fusion Science Nuclear Weapons Science Stockpile Stewardship Program History of Nuclear Weapon Design Simulation Computer Codes ALE3D MERCURY MIRANDA SPHERAL VisIt Co-Design Support Libraries Basic Science Simulation Visualization Facilities High Explosives Applications Facility History Mission Work with HEAF Tanks Gallery Calendar Experimental Test Site About Site 300 Site Access Contained Firing Facility Continuosly Operating Reference Station Calendar B453 Simulation Facility National Ignition Facility Superblock Linac Coherent Light Source Jupiter Laser Facility Joint Actinide Shock Physics Experimental Research Facility Big Explosives Experimental Facility U1a Complex Careers Student Programs Postdoc Programs Nuclear Deterrence The Stockpile Stewardship Program serves as a highly effective tool for maintaining confidence in the U.S. nuclear deterrent Learn More » Sequoia Livermore’s 20-petaFLOPS supercomputer reaches new heights Learn More » Life Extension Program As part of the W78 LEP, Livermore engineers evaluate the warhead’s complete lifecycle, from fabrication to deployment Learn More » Thermite Reaction Image of a thermite reaction inside HEAF’s 10-kilogram spherical tank Learn More » Linac Coherent Light LCLS undulator magnets create intense x-ray laser light by jostling a pulse of electrons traveling near the speed of light Learn More » Meteor Crater Scientists are analyzing techniques to disrupt or divert asteroids... Learn More » Radiation Detector This radiation detector will help detect illicit sources of plutonium and highly enriched uranium Learn More » Flash X-Ray The FXR is the only wide-angle penetrating radiography accelerator in the NNSA complex... Learn More » NIF Capsule This tiny metallic case holds the target capsule for experiments conducted at the National Ignition Facility Learn More » ‹ › • • • • • • • • •STOCKPILE STEWARDSHIP SCIENTIFIC INNOVATIONS JOIN OUR TEAM Who We Are Weapons and Complex Integration (WCI) at the Lawrence Livermore National Laboratory works to establish a science-based understanding of nuclear weapons performance and assesses the safety, security, and effectiveness of the stockpile. We integrate science, technology, and engineering with other laboratories within the National Nuclear Security Administration Complex. WCI operates many state-of-the-art experimental and computer facilities essential for program success. Learn more about our heritage, organization, and people. In the News 1/22/2019 Kim Budil to lead Weapons and Complex Integration 11/12/2018 Sierra takes No. 2 spot on list of world’s fastest supercomputers 10/26/2018 Livermore unveils Sierra, world’s third fastest supercomputer 8/1/2018 The Flash X Ray machine achieves double-pulse capability 7/10/2018 The National Ignition Facility sets new laser energy record 6/28/2018 W80-4 life extension passes key milestone 2/22/2018 Revival of Cold War–era film reels 11/9/2017 ’Architect’ of Stockpile Stewardship awarded Foster Medal 9/27/2017 Simulations elucidate metal strength 6/5/2017 LLNL supports ICBM flight tests 5/8/2017 Frank Graziani named Distinguished Member of Technical Staff 3/14/2017 Greg Spriggs declassifies rescued nuclear test films 1/18/2017 Two WCI scientists honored with Presidential Early Career Awards 12/13/2016 New Advanced Manufacturing Lab breaks ground 11/07/2016 WCI research wins 2016 R&D 100 Award 10/26/2016 WCI researcher Omar Hurricane selected as 2016 APS Fellows 10/12/2016 WCI planetary defense team demystifies Martian noon 07/28/2016 WCI postdoc Aurora Pribram-Jones named DOE Howes Scholar[more] SITEMAPWeapon Physics and Design Weapon Technologies and Engineering Weapon Simulation and Computing Inertial Confinement Fusion Science Nuclear Weapons Science Stockpile Stewardship Program History of Nuclear Weapon Design Simulation Computer Codes ALE3D MERCURY MIRANDA SPHERAL VisIt Co-Design Support Libraries Basic Science Simulation Visualization Facilities High Explosives Applications Facility History Mission Work with HEAF Tanks Gallery Calendar Experimental Test Site About Site 300 Site Access Contained Firing Facility Continuosly Operating Reference Station Calendar B453 Simulation Facility National Ignition Facility Superblock Linac Coherent Light Source Jupiter Laser Facility Joint Actinide Shock Physics Experimental Research Facility Big Explosives Experimental Facility U1a Complex Careers Student Programs Postdoc Programs MISSION AREAS Bio-Security Counterterrorism Defense Energy Intelligence Nonproliferation Science & Technology Weapons and Complex Integration ABOUT LLNL What We Do How We Do It Our Values Organization Publications History LLNL Home News Center Partnerships User Facilities Visiting Community Education Careers STAY CONNECTED ↑Lawrence Livermore National Laboratory • 7000 East Avenue • Livermore, CA 94550 Operated by Lawrence Livermore National Security, LLC, for the Department of Energy’s National Nuclear Security Administration. 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