LRO Safety
Dave Bogart
Code 302
August 16-17, 2005
NASA’s Goddard Space Flight Center
24b - 1
LRO System Safety - Requirements
NPD 8700.1
NASA Policy for
Safety and Mission
Success
Level I
NPD 8710.2
NASA Safety and
Health Program
NASA-STD-8719.8
ELV Payload Safety
Review Process
NPR 8715.3
NASA Safety
Manual
Level II
Level III
RLEP Mission
Assurance
Requirements
(MAR)
LRO Spacecraft
PAIP
Instruments’
Performance
Assurance
Implementation
Plans (PAIPs)
NASA’s Goddard Space Flight Center
AFSPCMAN 91-710 Range
Safety User Requirements
LRO System
Safety Program
Plan
Instruments’
System Safety
Program Plans
24b - 2
LRO Systems Safety - Requirements
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NASA Safety Policy NPD 8700.1 defines LRO’s safety objectives
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NASA Safety Manual NPR8715.3, and Range Safety User Requirements
Manual AFSCM 91-710 (Volumes 1, 3 and 6) define process, design, and
operational safety requirements
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Requirements for operations/processing:
– At GSFC: GPD 8715.1, “Goddard Space Flight Center Safety Policy,” and
540-PG-8715.1.1, “Mechanical Systems Safety Manual Volume I and II”
– At Launch Site: Range Safety User Requirements Manual, AFSCM 91-710
(Volume 6)
NASA’s Goddard Space Flight Center
24b - 3
LRO System Safety - Process
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Develop LRO System Safety Program Plan (SSPP) and oversee
implementation of SSPP
Perform Preliminary Hazard Analysis (PHA) that lists hazards, estimated
severity and frequency, and potential controls
Perform System Hazard Analysis (SHA) to verify system compliance with
safety requirements and recommend actions to eliminate or control risks
Perform Operations Hazards Analysis (OHA) to demonstrate planned I&T
activities meet facility safety requirements
Perform Operating and Support Hazard Analysis (OSHA) to evaluate
procedurally controlled activities for hazards and controls during prelaunch
processing.
System Safety Manager is part of the LRO Systems Engineering team and
participates in risk assessment.
NASA’s Goddard Space Flight Center
24b - 4
LRO System Safety - Deliverables
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LRO System Safety Program Plan (SSPP)
Hazard Analyses (PHA, SHA, OHA, O&SHA)
Safety Compliance Checklist
Missile System Prelaunch Safety Package (MSPSP)
Hazard Control Verification and Tracking
Ground Operations Procedures
Safety Noncompliance Requests
System safety deliverables from the Instruments will be used as inputs to the
LRO level safety documents
NASA’s Goddard Space Flight Center
24b - 5
LRO System Safety - Hazards
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Pressure Systems (Propulsion)
Fuel (oxidizer)
Ordnance (Pyrovalves)/ Pyro release Mechanisms
Batteries
Ionizing Radiation (LEND, CRaTER for calibration)
Non-Ionizing Radiation
– Laser
– RF
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Structure and Mechanism
Deployables (Solar Arrays, HGA)
GSE
– Electrical
– Pressure
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Material Handling Equipment
NASA’s Goddard Space Flight Center
24b - 6
Safety Conclusion
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The LRO safety requirements are well understood.
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Preliminary hazards have been identified and plans are in place.
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Mitigation activity planned is feasible.
LRO safety is ready to proceed to PDR
NASA’s Goddard Space Flight Center
24b - 7
Back up charts
Reliability
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Code 302 Reliability engineers coordinate the reliability program.
Reliability analyses are conducted (FMEAs, FTAs, Parts Stress Analysis, and Worst
Case Analysis)
Comparative numerical reliability assessments and reliability predictions are performed.
Trend data will be collected and monitored.
Limited life items are identified with the LRO Materials Engineer and tracked as needed
(operating times, cycles, etc.)
Active Risk Management (ARM) tool used across project to manage risk
Formal Risk Management Board established, meetings held monthly
NASA’s Goddard Space Flight Center
24b - 8