Navigation Links
Crew oxygen for ISS loaded on Jules Verne

Three weeks into delicate fuelling operations, Jules Verne Automated Transfer Vehicle has also been successfully loaded with oxygen. In orbit this will be transferred to the International Space Station's atmosphere for the crew to breathe.

The maiden voyage of the first European International Space Station (ISS) resupply spaceship is targeted for no earlier than 22 February.

Since early January, the launch campaign of the Jules Verne Automated Transfer Vehicle (ATV) has intensified with the month-long loading operations. These operations take place in the huge fuelling chamber inside the vast S5 integration building at Europe's Spaceport in Kourou, French Guiana.

Teams from Astrium sites in Bremen, Lampoldshausen (Germany), Stevenage (United Kingdom) and Les Mureaux (France) are in charge of these time-consuming and delicate operations. Wearing special protective suits, the teams work in three shifts. Specialists from Thales Alenia Space, Italy, are involved in loading the highly explosive pure oxygen gas.

The engineers first created a vacuum in the ATV gas tank and its circuit. Then, after checking the system is leak-proof, they connected the oxygen tank to transfer the gas, said Dominique Siruguet, ESA ATV Campaign Manager. But before this, they had to implement many strict safety procedures and create a very clean environment. This is all time consuming but necessary to avoid any risk with the highly explosive and flammable oxygen.

Many of the safety measures are needed to prevent any hydrocarbon particles from entering the on board and ground equipment, where they would present a fire risk. For this operation, a team of certified experts, different from the scapemen who perform the propellant fuelling, wear white non-flammable suits to handle the oxygen.

Four-tonne limit

From now until the end of the month, the largest quantity of propellant will be loaded on board Jules Verne: around 2 200 kg of MMH (Monomethylhydrazine) and 3 600 kg MON3 (Mixed Oxides of Nitrogen) propellant which will be used by ATVs own propulsion system.

ATV will use these propellants for its autonomous navigation towards the International Space Station (ISS) and, once docked, to contribute to the Station's attitude and orbit control, including re-boost of the whole space complex. Already around 860 kg of nitrogen tetroxide oxidiser (N2O4) and Russian produced UDMH (Unsymmetrical dimehtylhydrazine) have been stored on board ATV.

With the amount of propellant in ATV about to exceed 4 tonnes, the safety rules at the Spaceport prohibit working on other satellites or spacecraft within the perimeter of the S5 integration building.

"In the first week of February, Jules Verne ATV filled with a total 6.5 tonnes of four different propellants and 20 kg of oxygen will be moved to the Final Assembly Building [BAF - Batiment dAssemblage Final] where it will be mated to the Ariane 5 launcher. We then enter the Ariane 5/ATV 'combined operations plan', which ends with the final countdown," explains Nicolas Chamussy, ATV Programme Manager for EADS Astrium.

The whole Jules Verne ATV weighs 19.4 tonnes, including approximately 1 338 kg of dry cargo. During fuelling and oxygen operations, the ATV is electrically completely shut down for safety reasons. Each day the whole spacecraft is activated to check the spacecrafts health, and charge the batteries once again.

Once in orbit, the 20 kg of oxygen carried up by Jules Verne ATV, is manually injected by the crew into the ISS atmosphere. For up to six months, the ATV remains attached, mostly in dormant mode with the hatch to the ISS open.

With the ATV docked, the Station crew can enter the cargo section and remove the payload: supplies, science hardware, and lightweight luggage bags. Meanwhile, the ATV's liquid tanks are connected to the Station's own plumbing and their propellant contents discharged.

According to the needs of the ISS and its partners, the ATV remains an integral Station element for up to six months, and delivers dry cargo, fuel, water and oxygen to the ISS.


Contact: Markus Bauer
European Space Agency

Related biology news :

1. Low oxygen in coastal waters impairs fish reproduction
2. Researchers detect hint of oxygen 50 to 100 million years earlier than first believed
3. Why diving marine mammals resist brain damage from low oxygen
Post Your Comments:
(Date:6/27/2016)... Research and Markets has announced the addition ... to their offering. The report ... to grow at a CAGR of 12.28% during the period 2016-2020. ... in-depth market analysis with inputs from industry experts. The report covers ... The report also includes a discussion of the key vendors operating ...
(Date:6/22/2016)... , June 22, 2016  The American College of Medical ... Show Executive Magazine as one of the fastest-growing trade ... 25-27 at the Bellagio in Las Vegas ... highest percentage of growth in each of the following categories: ... companies and number of attendees. The 2015 ACMG Annual Meeting ...
(Date:6/22/2016)... LOS ANGELES , June 22, 2016 ... of identity management and verification solutions, has ... cutting edge software solutions for Visitor Management, ... ® provides products that add functional ... The partnership provides corporations and venues with ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... Charm Sciences, Inc. ... test has received AOAC Research Institute approval 061601. , “This is another AOAC-RI ... stated Bob Salter, Vice President of Regulatory and Industrial Affairs. “The Peel Plate ...
(Date:6/23/2016)... ... , ... STACS DNA Inc., the sample tracking software company, today announced that ... joined STACS DNA as a Field Application Specialist. , “I am thrilled that ... of STACS DNA. “In further expanding our capacity as a scientific integrator, Hays brings ...
(Date:6/23/2016)... , June 23, 2016 On ... session at 4,833.32, down 0.22%; the Dow Jones Industrial Average ... 500 closed at 2,085.45, down 0.17%. has initiated coverage ... INFI ), Nektar Therapeutics (NASDAQ: NKTR ), Aralez ... Inc. (NASDAQ: BIND ). Learn more about these ...
(Date:6/23/2016)... 23, 2016 adds ... to its pharmaceuticals section with historic and forecast ... much more. Complete report on the ... profiling 15 companies and supported with 261 tables ... . The Global Cell Culture ...
Breaking Biology Technology: