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
[???] 1 – SM Air Conditioner System (“SKV1”) – On
[???] 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
