Author Topic: Possible ammonia leak inside the ISS - January 14th 2015 (Read 71863 times)

Targeteer · « **Reply #100 on:** 01/14/2015 07:51 pm »

Due to limitations caused by the loss of cooling loop B, the crew can spend the night in the USOS but they must camp out aft of Node 2.

Targeteer · « **Reply #101 on:** 01/14/2015 08:12 pm »

Crew is reconfiguring Ku comm at Houston's request before sleep.

JimO · « **Reply #102 on:** 01/15/2015 02:44 am »

News reports tonight kept referencing the crew hearing the sound of an alarm that alerted them to the initial problem. But weren't they first notified by a voice call from the Capcom? Sorry, I'm confused. Was there EVER an audible alarm sounding?

Lee Jay · « **Reply #103 on:** 01/15/2015 03:26 am »

Quote from: JimO on 01/15/2015 02:44 am

News reports tonight kept referencing the crew hearing the sound of an alarm that alerted them to the initial problem. But weren't they first notified by a voice call from the Capcom? Sorry, I'm confused. Was there EVER an audible alarm sounding?

Jim, I thought you had L2 access. The ISS section has a pretty good description of what transpired, but I'm not qualified to interpret it to just give you a solid yes or no.

Targeteer · « **Reply #104 on:** 01/15/2015 04:20 am »

Speaking of alarms, the crew had one go off about 15 minutes ago but CAPCOM quickly called to say no crew action was required. I heard the crew setting up the comm consoles before they went to bed and the only one they left on was the closest to Butch's head

I think Samantha ended up hanging out in the PMM as her temp sleep location.

JimO · « **Reply #105 on:** 01/15/2015 04:41 am »

Quote from: Lee Jay on 01/15/2015 03:26 am

Jim, I thought you had L2 access. The ISS section has a pretty good description of what transpired, but I'm not qualified to interpret it to just give you a solid yes or no.

Thanks, got it, am nearing clarity -- slowly [grin].

Targeteer · « **Reply #106 on:** 01/15/2015 06:19 am »

Morning DPC. Planning to repress the cooling loop today. System restorations though-out the day and Houston will alert the crew for any impacts of changes. No fans in the Dragon so CO2 buildup is possible and the crew needs to monitor for symptoms. Crew is also prime for smoke detection in Node 2 and Dragon.

AJA · « **Reply #107 on:** 01/15/2015 07:59 am »

Quote from: Targeteer on 01/14/2015 07:01 pm

Houston cautioned that the US segment is at a higher pressure than the Russian segment and for the crew to be prepared for that.

How much higher, and what caused it? Rise in the temperature of the segment due to the shut-down of the cooling loops?

mtakala24 · « **Reply #108 on:** 01/15/2015 08:42 am »

Ping JimO:

The Italian site referenced in the first post has a youtube recording of the problem originally starting.

Chris Bergin · « **Reply #109 on:** 01/15/2015 11:57 am »

Tons of notes in a dedicated L2 section.
http://forum.nasaspaceflight.com/index.php?topic=36573.0

Pete will have an article on this tonight.

Prober · « **Reply #110 on:** 01/15/2015 12:35 pm »

Quote from: Targeteer on 01/15/2015 04:20 am

Speaking of alarms, the crew had one go off about 15 minutes ago but CAPCOM quickly called to say no crew action was required. I heard the crew setting up the comm consoles before they went to bed and the only one they left on was the closest to Butch's head I think Samantha ended up hanging out in the PMM as her temp sleep location.

Pulled up: http://spacestationlive.nasa.gov/displays/ethosDisplay1.html

Destiny numbers looked "strange' compared to everything else. Is that where the issues are happening?

woods170 · « **Reply #111 on:** 01/15/2015 12:58 pm »

Quote from: Prober on 01/15/2015 12:35 pm

Quote from: Targeteer on 01/15/2015 04:20 am
Speaking of alarms, the crew had one go off about 15 minutes ago but CAPCOM quickly called to say no crew action was required. I heard the crew setting up the comm consoles before they went to bed and the only one they left on was the closest to Butch's head I think Samantha ended up hanging out in the PMM as her temp sleep location.

Pulled up: http://spacestationlive.nasa.gov/displays/ethosDisplay1.html

Destiny numbers looked "strange' compared to everything else. Is that where the issues are happening?

Don't seem out-of-the-ordinary to me. The issues were earlier reported to be taking place in Node 2 (Harmony)

mtakala24 · « **Reply #112 on:** 01/15/2015 04:08 pm »

Loop B flowrate has not increased yet. That restart procedure must be tedious.

Chris Bergin · « **Reply #113 on:** 01/16/2015 01:34 am »

And as promised, here's the highly technical overview via L2 notes from Pete Harding!

http://www.nasaspaceflight.com/2015/01/iss-returning-normal-false-ammonia-leak-alert/

Read this be instantly become cleverer

mtakala24 · « **Reply #114 on:** 01/16/2015 01:48 am »

Loop B still not running; the "situation" is not normal as now the cooling is single-string still. But off to bed now, smiling after watching certain Mission Status Briefing video.

DaveJSC · « **Reply #115 on:** 01/16/2015 11:52 am »

Quote from: Chris Bergin on 01/15/2015 11:57 am

Tons of notes in a dedicated L2 section.
http://forum.nasaspaceflight.com/index.php?topic=36573.0

Pete will have an article on this tonight.
Quote from: Chris Bergin on 01/16/2015 01:34 am
And as promised, here's the highly technical overview via L2 notes from Pete Harding!

http://www.nasaspaceflight.com/2015/01/iss-returning-normal-false-ammonia-leak-alert/

Read this be instantly become cleverer

What a brilliant article!! Well done Pete

robertross · « **Reply #116 on:** 01/16/2015 02:59 pm »

Quote from: Chris Bergin on 01/16/2015 01:34 am

And as promised, here's the highly technical overview via L2 notes from Pete Harding!

http://www.nasaspaceflight.com/2015/01/iss-returning-normal-false-ammonia-leak-alert/

Read this be instantly become cleverer

That was an excellent piece of work Pete. Great job!
That would enable anyone in the mass media be able to correct their inaccuracies (being kind)

mtakala24 · « **Reply #117 on:** 01/16/2015 04:05 pm »

Loop B was at well over 1000kPa an hour ago, but its now back to around 988kPa. Still higher than yesterday.

mtakala24 · « **Reply #118 on:** 01/17/2015 05:06 pm »

Over 1100kPa. Pump still not running.

Mapperuo · « **Reply #119 on:** 01/17/2015 06:54 pm »

MCH just told crew the MDM card failed again and it would have triggered another toxic alarm like before but they adjusted it so it did not in this case. Looking at a forward plan for this failed card.