WATER ELECTROLYSIS SYSTEM REFURBISHMENT

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WATER ELECTROLYSIS SYSTEM REFURBISHMENT ( water-electrolysis-system-refurbishment )

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PRECEDING PAGE BLANK NOT FILME Section 3 CHECKOUT TESTING 3.1 INTRODUCTION This section contains the results of the checkout test program con- ducted to verify the operational status of the NASA-LMSC Electrolytic Oxygen Generator prior to delivery of the unit to the McDonnell-DouglasAstronautics Company (MDAC) facility in Huntington Beach, California. Testing was performed by Bioengineering personnel in the LMSC facility in Sunnyvale, California. Test results for bench testing of critical components, a 50-hour test period to demonstrate startup, shutdown, and restart capabilities in the new automatic mode, and a final 100-hour acceptance test are included in the following paragraphs. 3.2 3.2.1 PRE-TEST PARAMETERS Electrolysis Modules External Leakage Conditions. Each module was plumbed with a common manifold for both gas discharge ports and an electrolyte port; all other ports were sealed. The module was submerged completely in water and the mani- foldwaspressurizedto34.5kN/m (5psig). Visualinspectionfor gas bubbles was the external leakage criterion. Data Recording Requirements. Log book entry; Pass or fail. No data sheet. 2 Values and Tolerances. No visible leakage was acceptable at 34.5 kN/m (5 psig). Results. Modules 2 and 4 passed on first assembly. Module 1 leaked on first assembly due to a defective O-ring. The O-ring was replaced and Module 1 passed on second assembly. Module 3 leaked on first assemblyduetoamissingO-ring. AnO-ringwasinstalledand Module 3 passed on second assembly. Precedingpage blank 41

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