NASA just announced that they found an ammonia leak in one of the cooling circuit aboard the ISS (ammonia is used to cool down the power circuits). The astronauts are not in danger right now but they might need to shut down some of the solar panels in the next days if they can't find a solution to the problem.
Official press release from NASA
http://www.nasa.gov/mission_pages/station/expeditions/expedition35/e35_050913.html
Tweets from Chris Hadfield (the ISS Commander)
Official press release from NASA
http://www.nasa.gov/mission_pages/station/expeditions/expedition35/e35_050913.html
At around 10:30 a.m. CDT on Thursday, the Expedition 35 crew reported seeing small white flakes floating away from an area of the International Space Station’s P6 truss structure. The crew used handheld cameras and Mission Control used external television cameras to gain additional imagery in an attempt to narrow down the leak’s location.
The crew reports, along with imagery and data received by flight controllers in Mission Control in Houston, confirmed that the rate of the ammonia leaking from this section of the cooling system has increased. Ammonia is used to cool the station’s power channels that provide electricity to station systems. Each solar array has its own independent cooling loop. This ammonia loop is the same one that spacewalkers attempted to troubleshoot a leak on during a spacewalk on Nov. 1, 2012. It is not yet known whether this increased ammonia flow is from the same leak, which at the time, was not visible.
The station continues to operate normally otherwise and the crew is in no danger.
Plans are being developed to reroute other power channels to maintain full operation of those and other systems normally controlled by the solar array that is cooled by this loop.
The early analysis by thermal control systems specialists indicates that the leak rate could result in a shutdown of this one cooling loop in about 48 hours. The team is looking at whether any additional imagery is needed to isolate the leak’s location.
Tweets from Chris Hadfield (the ISS Commander)
Station's power relies on ammonia coolant. A few hours ago, we determined that the ammonia was leaking out of the Station and into space.
It is a serious situation, but between crew and experts on the ground, it appears to have been stabilized. Tomorrow we find out for certain.
MP3 of Chris Hadfield reporting to the ground about the leak.
http://www.nasa.gov/mp3/748029main_130509_GMT1835.mp3