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Civil Space 2013 Critical Challenges: Safety, Mission Assurance, and Risk Mitigation. Jeff Patton 13 February 2013. Atlas & Delta Capabilities to Support Human Spaceflight. Atlas & Delta heritage flying crew dates back to Mercury/Atlas and Gemini/Titan

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civil space 2013 critical challenges safety mission assurance and risk mitigation

Civil Space 2013Critical Challenges: Safety, Mission Assurance, and Risk Mitigation

Jeff Patton

13 February 2013

atlas delta capabilities to support human spaceflight
Atlas & Delta Capabilities to Support Human Spaceflight
  • Atlas & Delta heritage flying crew dates back to Mercury/Atlas and Gemini/Titan
  • Atlas & Delta systems have evolved to provide reliable assured access for critical NASA, Air Force and NRO missions
  • In 2002 NASA selected Atlas V and Delta IV to launch the crewed Orbital Space Plane
  • Atlas V selected by Boeing and Sierra Nevada to launch their Commercial Crew spacecraft
  • NASA selected the Delta IV Cryogenic Upper Stage for SLS

Existing, flight proven launch vehicles and stages can meet Human Space Flight Needs

atlas and delta on going launch operations
Atlas and Delta On-Going Launch Operations

2002 2003 2004 2005

2006 2007 2008 2009

2010 2011 2012 2013

Record of continuous Mission Success

  • Atlas II, IIAS, III, V – 108
  • Atlas V - 37
  • Delta II - 97
  • Delta IV - 21
ula experience with human certification
ULA Experience with Human Certification
  • Involved with NASA and commercial human rating launch studies over the past 10 years
  • Involved with NASA human certification requirements development and assessment (8705.2A, 2B, 1100-Series)
  • Operational tempo and flight experience key to human certification
    • Detailed understanding of system behavior and environments
      • System margins and risks
      • Precise abort criteria for Emergency Detection System (EDS)
    • Non-crewed missions retire risk prior to first crewed mission

Human Certification Is The Interaction Between Requirements And In-depth Systems Knowledge Best Gained With Flight Experience

human launch services focus
Human Launch Services Focus
  • Partnership with NASA
  • Leverage Mission Success Heritage to Create World-Class Safety Culture

100% Human

Spaceflight Safety

Expanding Our Mission Success Ethic to Embrace Crew Safety as the Highest Value

system level crew safety
System-Level Crew Safety
  • Emergency Detection
  • Monitor Critical Systems Using Independent Fault-tolerant Failure Sensing System
  • Abort Commands
  • Fly Instrumentation on All Missions
  • Already Know Our Envts & In-family Characteristics for Developing EDS
  • Reliability
  • Demonstrated Reliability
  • Experienced People & Proven Management Systems
  • Single Fault-tolerant Systems
  • Robust Vehicle Design
  • Vehicle Characterization
  • Rigorous, Closed-loopTest-as-you Fly Processes

LV Emergency Detection

LV Reliability

Commercial Crew Spaceflight

Approach

Intact Abort Capability

  • Intact Abort Capability
  • Catastrophic LV Failures Minimized
  • Benign Abort Environments
  • Black Zones Eliminated

Common Sense System-Level Approach to Achieve Crew Safety

nasa launch vehicle certification as foundation for crew launch certification
NASA Launch Vehicle Certification as Foundation for Crew Launch Certification
  • Provides a rigorous, documented, and consistent process to mitigate risk
  • Nuclear Safety Launch Approval Process provides an additional level of safety and government insight for spacecraft carrying radioactive material

NASA HUMAN SPACE FLIGHT CERTIFICATION

TO GO

NUCLEAR LAUNCH APPROVAL

NASA CERTIFICATION

BODY OF EVIDENCE

COMPLETE

FLIGHT DATA AND

VERIFICATION DATABASE

Atlas V & Delta II are the world’s only NASA Category 3 certified vehicles;

Atlas V is the only LV with nuclear launch approval

ula human spaceflight certification
ULA Human Spaceflight Certification
  • Risk Oriented Path
  • Requirements Oriented Path
  • Hazard Analysis
  • Meets-IntentAssessment(DER)
  • Fault Tree Analysis (FTA)
  • Probabilistic Safety Analysis (PSA)
  • Integrated Abort Analysis
  • Flight History

Certification Rationale

ULA’s Certification Plan Exercises Both Technical Risk

Retirement and Requirements Implementation

requirements oriented path
Requirements Oriented Path
  • Atlas V Design Equivalency Review (“DER”) Evaluated Existing Atlas V System Relative to NASA 1130/1140 Requirements Documents
  • Delta Cryogenic Upper Stage Design Requirements Compliance Relative to NASA SLS Specifications

DCSS Disposition Count – 1/24/13

3

47

17

217

50

risk oriented path
Risk Oriented Path

Heritage LV Body of Knowledge

  • Fault Tree Analysis (FTA)
    • Top down analysis that identifies single-point failures and critical combinations of failure modes for all flight and ground systems
  • Probabilistic Safety Analysis (PSA)
    • Systematic, comprehensive discipline that uses a combination of logic and probabilistic modeling tools to quantify risk drivers that affect the crew and mission
  • Hazard Analysis
    • The identification, mitigation, and verification of catastrophic hazards on the launch vehicle that can lead to loss of mission/loss of crew

Probabilistic Safety Analysis

Fault Tree Analysis

Crew Safety Hazard Analysis

LV System Monitoring/

Sensor List

Emergency Detection System Design

Thorough Knowledge of Vehicle Characteristics, Anchored in Flight Data, is Crucial to Designing EDS

certification summary
Certification Summary
  • ULA is Expanding our Mission Success ethic to embrace crew safety as the highest value
  • ULA is developing the critical safety engineering products to support Human Spaceflight Certification for Commercial Crew and SLS
  • Human certification is the interaction between requirements and in-depth systems knowledge best gained with flight experience