NASA ISS On-Orbit Status 14 January 2015

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NASA ISS On-Orbit Status 14 January 2015.

Today: Ammonia Leak False Alarm: This morning at 3:58am CST, ISS telemetry indicated a possible leak of ammonia within Node 2 in the US Segment.

The crew performed emergency procedures and subsequently evacuated the US Segment and isolated themselves to the Russian Segment. The External Thermal Control System (ETCS) Loop B, Node 2 Low Temperature Loop (LTL), and various pieces of equipment in Node 2, Node 3, JEM, and Columbus modules were shut down as a result to this event.

Ground teams worked throughout the day to analyze the telemetry signatures. It was determined that the event was triggered by an erroneous indication from the Node 2-2 Multiplexer/Demultiplexer (MDM). The MDM has since been power cycled and the telemetry which caused the initial event is confirmed to be within normal limits. At approximately 2:06pm CST, the Crew ingressed the US Segment wearing protective ammonia masks and tested the atmosphere as a precaution. No indications of ammonia were detected. Flight Control Teams are working towards recovering Loop B and activating equipment that was powered down as a result of the initial response.

Today's Planned Activities
Today's activities were deferred as a result of the anomaly.

Ground Activities

Safeing and recovery of systems
Three-Day Look Ahead:

Thursday, 01/15: Loop B Reactivation, MICRO-5, Fruit Fly Ops, SPHERES Conference, Airway Monitoring, EpiGenetics Prep, BD2 Control Panel H/O
Friday, 01/16: TBD, Replanning in process
Saturday, 01/17: TBD, Replanning in process
QUICK ISS Status - Environmental Control Group:

Component - Status
Elektron - On
Vozdukh - On
[СКВ] 1 - SM Air Conditioner System ("SKV1") - On
[СКВ] 2 - SM Air Conditioner System ("SKV2") - Off
Carbon Dioxide Removal Assembly (CDRA) Lab - Standby
Carbon Dioxide Removal Assembly (CDRA) Node 3 - Standby
Major Constituent Analyzer (MCA) Lab - Idle
Major Constituent Analyzer (MCA) Node 3 - Operate
Oxygen Generation Assembly (OGA) - Process
Urine Processing Assembly (UPA) - Standby
Trace Contaminant Control System (TCCS) Lab - Off
Trace Contaminant Control System (TCCS) Node 3 - Full up

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