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Independent Orbiter Assessment (IOA): Analysis of the electrical power generation/power reactant storage and distribution subsystemThe results of the Independent Orbiter Assessment (IOA) of the Failure Modes and Effects Analysis (FMEA) and Critical Items List (CIL) are presented. The IOA approach features a top-down analysis of the hardware to determine failure modes, criticality, and potential critical items. To preserve independence, this analysis was accomplished without reliance upon the results contained within the NAA FMEA/CIL documentation. The independent analysis results corresponding to the Orbiter Electrical Power Generation (EPG)/Power Reactants Storage and Distribution (PRSD) System Hardware is documented. The EPG/PRSD hardware is required for performing critical functions of cryogenic hydrogen and oxygen storage and distribution to the Fuel Cell Powerplants (FCP) and Atmospheric Revitalization Pressure Control Subsystem (ARPCS). Specifically, the EPG/PRSD hardware consists of the following: Hydryogen (H2) tanks; Oxygen (O2) tanks; H2 Relief Valve/Filter Packages (HRVFP); O2 Relief Valve/Filter Packages (ORVFP); H2 Valve Modules (HVM); O2 Valve Modules (OVM); and O2 and H2 lines, components, and fittings.
Document ID
19900001602
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Gotch, S. M. (McDonnell-Douglas Astronautics Co. Houston, TX, United States)
Date Acquired
September 6, 2013
Publication Date
December 5, 1986
Subject Category
Space Transportation
Report/Patent Number
NAS 1.26:185556
NASA-CR-185556
REPT-1.0-WP-VA86001-11
Accession Number
90N10918
Funding Number(s)
CONTRACT_GRANT: NAS9-17650
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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