Spacecraft Deemed To Meet Critical Human Space Flight Requirements

The Orion crew exploration vehicle has successfully completed the Phase 1 Safety Review of NASA's Human Rating Requirements for space exploration in low Earth orbit and beyond. The NASA/Lockheed Martin Orion team earned the approval from NASA's Constellation Safety & Engineering Review Panel (CSERP) upon completion of the review, an essential requirement for the Orion program to move forward to the Critical Design Review and Phase 2 Safety Review.

The safety review process is a rigorous and exhaustive look at the design and operational concepts to assure that all requirements have been adequately met. System safety requirements address potentially catastrophic failures that could result in loss of crew or loss of mission during launch, ascent to orbit, approach and docking to the International Space Station, re-entry, landing, and recovery operations. Thoroughly reviewing spacecraft designs and operations for possible causes of such catastrophic failures, and designing appropriate mitigations for them, is a critical part of NASA's human rating program.

Orion Crew Module Under Construction

"Completing this significant safety review puts Orion well down the road in satisfying the requirements to minimize the nation's gap in human space flight," said Paul Benfield, Lockheed Martin Integrated Reliability & Safety Manager for the Orion Program. "NASA's current human rating standards include stringent requirements and thorough procedures developed from the best practices of NASA's past 50 years of human spaceflight."

Benfield noted that human rating a vehicle for beyond low Earth orbit (LEO) is particularly challenging given the greater autonomy of such a mission, the extended mission durations, and increased time to return to Earth. This Phase 1 Safety milestone covers the requirements for Orion missions in LEO as well as sortie missions to the moon. The design enables a six-month on-orbit duration which is vital to assure return capability of the space station crew, as well as support autonomous lunar orbit operations. This long duration design far exceeds the one- to two-week capabilities offered by other potential providers.

Artist's Rendering

"Human rating a spacecraft is not a feature you can just simply add on once the vehicle is designed," explained Benfield. "It is a process that requires endurance and attention to detail to ensure that safety is driven into every aspect of the vehicle design and operations from the beginning. Optimal safety and reliability is strategically and systematically incorporated into the vehicle from day one, concurrent with critical trade decisions considering vehicle mass and cost."

FMI: www.nasa.gov, www.lockheedmartin.com