1

ISS STATUS

Michael SuffrediniManager, ISS Program

NAC Space Operations CommitteeSeptember 13, 2010

Flight Program Working Group (FPWG)Crew Rotation and Port Utilization Graphic – For Reference Only

NASA Official: Sean FullerPrepared by: Scott Paul

Chart Updated: Sept. 8th, 2010SSCN/CR: 12498 + 12465A

For current baseline refer to SSP 54100 IDRD Flight Program

LaunchSchedule

Crew Rotation

Stage EVA

Port

Util

izat

ion

2010 11/7End DST

3/13Daylight Savings 2011

PMA-2

SM-Aft

FGB/MRM1

DC-1

MRM2(SM Zenith)

Node 2Nadir

OCT NOV DEC JAN FEB MAR APR MAYAUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

11/6End DST

Launch |β| - Cutout (60°)|β| > (60°)

28S9/30

No232

22S

38P

SpX-D36/6

12/24

SpX-D24/12

9/24

24S10/8

No701No407

39P9/10

24S

10/10

39P

12/20

25S12/13

No230

25S

12/1511/30

Increment 26

9/12

No408

40P10/27

40P

4/14 – 4/16

SpX-D2Window

(22S)↓(22S)↓(22S)↓

R

RN

(22S)↓

(22S)↓

(22S)↓175 days

175 days175 days

N

RN Walker

Yurchikhin

Wheelock (CDR-25)

(23S)↓

(23S)↓

(23S)↓167 days

167 days167 days

Inc 25 Inc 24

6/8 – 6/26

SpX- D3

8/31

10/26 10/29

ATV2

HTV21/20

1/27 - 2/24

HTV2 SpX-1

7/22 – 8/22

3/16

1/24 1/31

26S3/30

No231

NRR

S. Kelly (CDR-26)

Skripochka

Kaleri159 days (24S)↓159 days (24S)↓159 days (24S)↓

RN

E

Kondratiev (CDR-27)Coleman

Nespoli

Launch – Undock = 137 days

SpX-17/20

SpX-D110/20

No410

42P4/27

5/16

NR

R

(26S)↓(26S)↓(26S)↓

Inc 27 Increment 28

26S

4/1

4/26

27S5/30

No702

27S

6/1

N

R

(27S)↓(27S)↓(27S)↓

5/10

(25S)↓(25S)↓(25S)↓

43P

6/23

No411

43P6/21

A. Borisienko (CDR-28)R. Garan A. Samokutayev

J

ATV212/16

9/16

No412

44P8/30

SpX-211/4

SpX-2

11/6 – 12/16

8/29

42P

4/29

44P

9/1

M. Fossum (CDR-29)S. Furukawa

S. Volkov

154 days

154 days154 days

170 days

170 days170 days

No409

41P1/28

41P

Strategic Timeframe

R-28

No413

45P10/26

45P

10/28 2/2610/25

28S

10/2

29S11/30

No703

29S

12/2

NR

R

(28S)↓(28S)↓(28S)↓

(29S)↓(29S)↓(29S)↓

Inc 29 Increment 30

R

N

R-29 R-30

28 d berth

11/16

#3-26

10/10 – 11/1

Orb-D1

Orb-D110/5

170 days

170 days170 days

40 d berth22 days

11/12, 11/17 (u/r)

R-26, 27

31 days 18 day

U-15, 16, 17

12/15 – 1/8ATV Dck Win

2/9 – 2/14 2/21 – 3/11ATV ATV

ULF6

2/28 - 3/811/3 – 11/10

ULF5

STS13311/01

103(11+1)190 nm2 EVA

(12+1)190 nm3 EVA

105

STS1342/26

LON-MPLM

7/1 – 7/8

8/7, 8/11, 8/16

8/22 – 8/26 11/17 – 11/25 1/14 – 1/22 4/16 – 4/19 6/11 – 6/20 8/11 – 8/17 11/10 – 11/178 docked8/13 – 8/24

8 docked11/7 – 11/23

8 docked1/4 – 1/20

8 docked4/6 – 4/17

Peak ~ 62.0°8 docked

6/1 – 6/188 docked

8/1 – 8/158 docked

10/31 – 11/15

#3-57

STS335LON-MPLM

6/28

104(12+0)

4-crew1 EVA

23S

3/16

Burbank(CDR-30)Shkaplerov

Ivanishin

168 days

168 days168 days

Kononenko (CDR-31)Kuipers

Petit

167 days

167 days167 days

E

5/15

(22S)↓(22S)↓(22S)↓

RRN

(30S)↓(30S)↓(30S)↓

4/1

MLM(NET 5/1)

2/29 5/1 5/16

3/5 u/r

ATV3

3/8 u/r

No414

46P2/27

30S3/30

No704

5R (MLM)NET 5/1

47P5/14

31S5/29

SpX-34/12

Orb-13/7

ATV32/29

HTV31/12

SpX-3

4/14 – 5/1329 d berth

3/10 – 4/9

Orb-1 30 d berth

1/17 -2/16

HTV33/630 days

1/7– 1/16 4/11Peak ~ 60.5°

U-18 R-31

2012

Inc 31

46P

23 Soyuz/Expedition 24 Launch

Vehicle: 23 Soyuz, TMA-19

Launch: June 15, 2010

Docking: June 17, 2010

Undock/Landing: November 30, 2010Fyodor Yurchikhin

Soyuz Commander/ISS Flight Engineer

Douglas WheelockISS Flight Engineer/Exp 25 Commander

Shannon WalkerISS Flight Engineer

3

22 Soyuz/Expedition 23 crew launched April 2, 2010

Alexander Skvortsov Expedition 24 Commander/

Soyuz Commander/ISS Flight Engineer

Tracy Caldwill ISS Flight Engineer

Mikhail Kornienko ISS Flight Engineer

Pg. B-4 Pre-DecisionalInternal Use Only M. Owens 08/26/10

INCREMENTS 23 & 24 FP SSCN 12326B, CSRD Chit 8789

Apr 10 Sep 10May 10 Jun 10 Jul 10 Aug 10Mar 10Increment 23 Increment 24

21S20S

FGB/MRM1MRM2

DC-1SM AftN2 Nadir

35P36P

Stage 21S-22

Increment 22

4/719ADock

4/1719A

Undk

Stg21S-23

(20 days)

Stage 19A(29 days)

4/422SDock

22S

6/221S

Undock

37P23S

23S

23S Relocation

28-Jun

23 SoyuzCrew

5/16ULF4Dock

5/23ULF4Undk

Stage ULF4-24(107 days)

6/1723SDock

RS EVA #25Jul 27

39P38P

9/2422S

Undock

E23 CDR – Kotov (86/162)E23 FE-5 – Noguchi (86/162)E23 FE-6 – Creamer (86/162)

J. WilliamsSuraev

21 SoyuzCrew

E24 FE-4 – Wheelock (90/161)E24 FE-5 – Yurchikhin (90/161)

22-Apr 01-May10-May 2-Jul

3/1820S

Undock

US EVA #15, 16, 17Aug 7, 11, 16

12-Sep21S

21S Relocation

12-May

StgULF4-23(9 days)

31-Aug

E23 FE-1/E24 CDR – Skvortsov (59/165)(106/165)E23/E24 FE-2 – Caldwell-Dyson (59/165)(106/165)

E23/E24 FE-3 – Kornienko (59/165)(106/165)

22 SoyuzCrew

E24 FE-6 – Walker (90/161)

Expedition 24 Mission Objectives

Launch and dock 23Soyuz - Complete Perform Expedition crew familiarization for Expedition 24 - Complete Relocate 23Soyuz from Russian Service Module to mini research module

(MRM1) - Complete Conduct one Russian EVA – Complete Conduct one US EVA (FGB PDGG) – Def erred due to Pump Module (PM)

Contingency EVAs Three contingency EVAs (Pump Module Changeout) – New/Complete

(additional EVA required in the future to stow the old PM on ELC-2) Continue MRM1 outfitting and hardware configuration – Continuing Continue checkout of new utilization racks – MELFI-3 and WORF (Complete),

ER7 (Deferred – lower priority), MARES (Scheduled) Transfer Crew Quarters 3 from the Japanese lab to Node 2 – (Scheduled –

pending completion of alternate installation procedure) Perform backup Ku-Band antenna (SGANT) activation and checkout –

Deferred (priority lowered) Continue installation and checkout of Sabatier water generation system -

Deferred due to PM Contingency EVAs Perform a major software upgrade - Complete Perform preparation tasks for STS-133/ULF5 delivery of the permanent

multipurpose module (PMM) and the EXPRESS Logistics Carrier (ELC4) –Deferred due to launch delay from Sep to Nov

Return 22Soyuz and crew – Landing at 11:55pm CDT on Sep 23, 2010

Russian MRM1 delivered on STS132/ULF4, May 2010

5

Expedition 24 Crew on ISS

Expedition 24 Research Program

• Plans for Expedition 24 include operation of 127 integrated experiments in biology and biotechnology, Earth and space science, educational activities, human research, physical and materials sciences and technology.

• Two are planned for operation by the Canadian Space Agency (CSA)• Twenty-seven are planned for operation by the European Space Agency (ESA)• Twenty-five are planned for operation by the Japan Aerospace and Exploration Agency (JAXA) • Fifteen are ready for operation, but designated as “reserve” and will be performed if crew time available• Sixteen are planned for sortie experiments to be conducted by Space Shuttle crewmembers

• Experiments on this Expedition will support the work of more than 400 scientists• Four new facilities have been delivered to the ISS

• EXpedite the PRocessing of Experiments to Space Station Rack 7 (EXPRESS Rack 7)• Muscle Atrophy Research and Exercise System (MARES)• Minus Eighty-Degree Laboratory Freezer for ISS – 3 (MELFI-3)• Window Observational Research Facility (WORF)

• The ISS currently has 23 research facilities• Advanced Biological Research System (ABRS), Biological Experiment Laboratory (BioLab)• Combustion Integrated Rack (CIR), Fluids Integrated Rack (FIR), Materials Science Research Rack-1

(MSRR-1), Fluid Science Laboratory (FSL)• Two Human Research Facility Racks (ultrasound, refrigerated centrifuge, pulmonary function system, etc.• Six EXPRESS Racks (provide power, communications and vibration isolation for experiments) • European Modular Cultivation System (EMCS) – located within EXPRESS Rack 3A• Microgravity Sciences Glovebox (MSG)• Two Minus Eighty degree Laboratory Freezer for the International Space Station (MELFI)• European Drawer Rack (EDR), European Physiology Modules (EPM), European Transportation Carrier• Sun Monitoring on the External Payload Facility of Columbus (Solar)• Ryutai Experiment Rack (Ryutai), Saibo Experiment Rack (Saibo)

NASA

6

ISS Utilization in 2010

Since December 1, 2009 29 NASA experiments 49 IP experiments 349 Crew utilization hours*

NASA = 152 h (have other breakdowns) IPs = 197 h

5 Publications* Does not include 21.4 hrs of docked ops from 2/9-2/19/10

Planned for Expedition 23/24 - 133 72 NASA experiments 61 IP experiments 1065 Crew utilization hours

NASA = 479 h IPs = 587 h

7

TAGES MISSE

Card MAXI

29

10

10

33

23

26

Biology and Biotechnology

Earth and Space Science

Educational Activities

Human Research

Physical and Materials Sciences

ISS Research Accommodations Status (History)16 July 2010 (Data through 30 June 2010) [POC: Rod Jones/OZ]

National Aeronautics and Space Administration (NASA)

Japan Aerospace Exploration Agency (JAXA)

European Space Agency (ESA)

Number of New USOS Research Investigations Operated in Expeditions 0 through 22

by International Partner and Scientific Discipline Category

Technology Development

Physical and

Materials Sciences

Human Research

Earth and Space Science

Biology and Biotechnology

Cumulative for Expeditions 0 thru 22272 New USOS Investigations

182 NASA, 90 Int’l Partner26 Nat’l Lab, 153 Completed

> 985 Scientists

By International Partner

By Scientific Discipline Category

29

49

182

Canadian Space Agency (CSA)

12

Educational Activities

24 Soyuz/Expedition 25 Launch

Vehicle: 24 Soyuz, TMA-20

Launch: Oct 8, 2010

Docking: Oct 10, 2010

Undock/Landing: March 16, 2011Alexander Kaleri

Soyuz Commander/ISS Flight Engineer

Scott KellyISS Flight Engineer/Exp 26 Commander

Oleg SkripochkaISS Flight Engineer

9

23 Soyuz/Expedition 24 crew launched June 15, 2010

Douglas Wheelock Expedition 25 Commander

Shannon Walker ISS Flight Engineer

Fyodor Yurchikhin Soyuz Commander/ISS Flight Engineer

INCREMENTS 25 & 26 Updated 3 September 2010

Oct 10 Nov 10 Dec 10 Jan 11 Feb 11

23S22S

MRM1MRM2

DC-1SM Aft

N2 Nadir

37P39P

Stage ULF4-24

Inc 24

Stage ULF5(~19 days)

10/1024S

Dock

24S

40P25S

StageULF-6

(~8 days)

12/1625S

Dock

RS EVA #2802/21/11

E25/E26 FE-1 – A. Kaleri (51/159)(106/157)E25/E26 FE-2 – O. Skripochka (51/159)(106/157)E25 FE-3/E26 CDR – S. Kelly (51/159)(106/157)

26-Oct 29-Oct20-Dec

24-Jan

E26 FE-4 – D. Kondratyev(90/TBD)E26 FE-5 – P. Nespoli (90/TBD)

E26 FE-6 – C. Coleman (90/TBD)

HTV2

23 SoyuzCrew

HTV2

CaldwellKornienko

Skvortsov

27-Jan 24-Feb

25 SoyuzCrew

30-Nov

41P31-Jan

Inc 27Increment 26Increment 25

16-Dec 10-Oct 16-Mar

24 SoyuzCrew

ATV2

ATV224-Dec

24-Sept

Sept 10

9/2422S

Undock

Wal

ker

Yur

chik

hin

Whe

eloc

k

Kelly

Skri

poch

ka

K

aler

i

Cole

man

N

espo

li

Kond

raty

ev

11/3ULF5Dock

11/10ULF5Undk

FPWG CR SSCN 12326B, IDRD Rev A CR 12385

Stage 23S-25(~39 days)

Stage 24S-26(~90 days)

2/28ULF6Dock

3/8ULF6Undk

Stage 23S-25 Stage ULF5 Stage 24S-26 Stage ULF6

VehicleTraffic

• 24S Dock (10/10)• 37P Undock (10/26)• 40P Dock (10/29)• ULF5 Docked Ops

(11/3 – 11/8)

• 23S Undock – End of Inc 25 (11/30)

• 25S Dock (12/16)• 39P Undock (12/20)• ATV2 Dock (12/26)• 40P Undock (1/24)• 41P Dock (1/31)• HTV2 Berth/Unberth (1/27 – 2/24)• ULF6 Docked Ops (2/28 – 3/8)

• 24S Undock - End of Inc 26 (3/16)

Assembly &Maintenance

• ULF5 Mission Prep• CHeCS RSR

relocation for ER8 installation

• MSG and MELFI rack relocation

• Prep for 23S undock• PMM Reconfiguration• RS Double EVA #26 &

27 (12 & 17 Nov)• Relocate ER8• FGB PDGF C/O

• RS EVA #28 (Feb 2011)• HTV2 Prep• Install & C/O JAXA Payload Racks

MSPR & KOBAIRO• FHRC & CTC from HTV-2 EP to ELC4• ULF6 Mission Prep• CUCU C/O• MARES Commissioning

• Prep for 24S return• Prep for Dragon

Demo 2 (3/23 – 3/25)

Software Transitions

• S0 R2 to R3• Node 3 SYS1 R2 to R3• Node 3 SYS2 R3 to R4• CUCU Software Update

Dragon Demo 2 3/23 –3/25

3/1624S

Undock

Mar 11

RS EVA #2611/12

E25 CDR – D. Wheelock (67/166)E25 FE-5 – F. Yurchikhin (67/166)

E25 FE-6 – S. Walker (67/166)

11/3023S

Undock

& #2711/17

ULF5 (STS-133) Astronauts

11

Steven LindseyCommanderFifth spaceflight

Eric BoePilotSecond spaceflight

Alvin DrewMission Specialist 1 Second spaceflight

Timothy KopraMission Specialist 2Second spaceflight

Michael BarrattMission Specialist 3Second spaceflight

Nicole StottMission Specialist 4Second spaceflight

Discovery will deliver and install the Permanent Multipurpose Module, the Express Logistics Carrier 4 and provide critical spare components to the International Space Station. This will be the 35th shuttle mission to the station..

Accomplishments Demo Flights

C1 - Dragon arrived at KSC on August 5 for October 20 launch. C2/C3 - Completed MSS 6.3 Formal Stage Test on August 6. C2/C3 - Completed in-rush current check out test on August 23

at SpaceX. C2 - Merlin engines (first stage) – five of the nine engines have

completed acceptance test firing (fifth engine completed both static fire tests on 8/17).

CRS Completed Quarterly Review on July 21 at SpaceX. COTS/CRS Internal JOP completed August 24. ATP received for CRS Mission 4.

Space X Progress

Laun

ched

Mai

den

Flig

ht o

n 06

/04/

2010

Near Term Activities: C2 - Merlin engines (first stage) – Engine 6 is

at Texas, preparing for test firing. Engines 7, 8, and 9 are being built at Hawthorne.

Javad GPS Qualification testing planned for September 10-30.

CRS Quarterly Review planned for October 12 at SpaceX.

COTS/CRS Internal JOP planned for September 14.

CRS 4 FRAM manufacturing planned to start in October

CRS 4 Preliminary external cargo complement planned for November.

C1: F9-002 First and Second Stages

12

Orbital Progress

13

Accomplishments

Demo Flight

PROX FEU and PLS EDU have been shipped from JAXA and are on-site at Orbital

Taurus II Stage 1 Yuzhmash Production Readiness Review successfully completed on July 27

Stennis Facility Readiness/Activation completed on July 22

Demo flight launch date moved to 9/27/11

SW Joint Test 2 held August 23 – September 3

Near Term Activities:

Demonstration Flight Delivery of first AJ-26 engine to Stennis scheduled for September 24. First AJ-26 Engine short duration hot fire at Stennis planned for mid-

October. PROX Ops TIM #6 at JAXA planned for October 2010 Joint Test 4, 5 planned for November 2010 PROX Checkout planned for December 2010

CRS ORB-2 VBR scheduled for October 2010 Launch/processing Facilities are still in the early part of the

construction processPressurized Cargo Module (PCM)

CRS Established 90 day launch window of January 1 – March 31, 2011 for ORB-1 ORB-3 ATP completed June 30 COTS/CRS Internal JOP completed August 3

Taurus II Fairing

EATCS Loop A Status

• Loop A PM Failure occurred 7/31 at 6:48 CDT – Subsequent restart attempts unsuccessful

• Cooling lost to about half of the USOS systems.– Channels 1 and 4 MBSUs and DDCUs– Two of four coolant loops in the lab and three of six in Node 2.

• Two EVAs planned to R&R failed pump with pump S/N 04 from ESP2• QD issues during EVA 1 resulted in an additional EVA• Loop A system pressure was lowered through innovative GPRV use to

allow for easier QD operations on EVAs 2 and 3• Modified QD procedures implemented based on EVA 1 to reduce risks• Successful R&R of the pump on EVA 3• Loop A was repressurized and restarted following crew ingress• Pump was run overnight and performance monitored prior to shutdown

for reconfiguration• Pump is performing well. Current signatures are on par with pump

operation prior to beginning of anomalous behavior

14

1516 September 2010 NASA/Michael Suffredini

External Active Thermal Control System

Loop A Historical Data

16

Current Data Pump Comparison

17

Ongoing and Forward Work

• Fault Tree team working to understand failure mechanism with daily data reviews

• No smoking gun has been identified to date• Team has identified no recommendations for modifications to

standard operation of either Loop A or Loop B pumps• ASTRO team has begun monitoring current data along with system

parameters– Daily exceedence scripts to scan for spikes over 7.75 amps– Pump current will be added to MER ADM Process

• ASTRO team will work to optimize pump operation as system performance is monitored

18

Water Processor Assembly Status

Observation/Discussion: Low Pump/Sep Inlet Pressure

Installation of External Filter Assembly (EFA) filter is providing acceptable performance with minimal impact on pressure drop

If performance deteriorates to degraded ops, next steps will be to change out the EFA and solenoid valve 5 Spare External Filter Assemblies currently on ISS

Elevated TOC in Product Water Recent Total Organic Carbon Analyzer (TOCA) analysis of WPA product water shows TOC is

increasing. TOC Analysis on 30 August was 1393 ug/L. Though TOC specification is 3000 ug/L, this trend could only occur due to anomalous WPA performance.

PWD TOC analyses have been consistent with WPA, indicating the source of the TOC increase is due to the “volatile” organics WPA is not effectively removing “volatile” organics (polar, low molecular weight, e.g.

ethanol). These organic are also not effectively removed by ACTEX (includes adsorbent that will remove non-volatile organics) at PWD inlet

TOCA calibration check on 23 July verified accuracy of TOC data Both Multi Filtration Beds were R&R’d on 29 July to address the possibility of organic

breakthrough or reactor poisoning

Water Processor Assembly Status

Status/Forward Work: WPA is OPERATIONAL Continuing to work with SF in characterizing on-orbit air quality in regards to TOC Investigating how leakage from SM Coolant Loop (triol) could impact WPA performance FIT held on 01 Sept 10 to determine next step for elevated TOC in product water

Recommendation to not change WPA operations and continue to trend TOC Spares status:

Gas/Liquid Separator spare on-orbit Cat Reactor (S/N 01) up on ULF5 Ion Ex Bed up on ULF5 Spare MF Beds up on ATV2

TOCA Data Summary

MF Bed R&R

Oxygen Generator Assembly Status

Observation/Discussion: Recirculation Loop High delta Pressure

Water ORU (with higher flow capacity mesh filter) was installed on 19 May ΔP returned to nominal levels Low pH in recirc loop water is a concern for long term system health

delta Pressure Sensor failed on 22 May Pump ORU was R&R’d on 10 Jul, however spare Pump ORU (S/N 002) failed to operate Pump ORU (S/N 001) with failed ΔP sensor was reinstalled with ΔP sensor inhibited

ΔP is being trended utilizing pump current data OGA failed on 5 July due to high voltage on cells 18 and 27

Hydrogen dome was R&R’d on 22 July along with recirc loop flush to recover pH Spare Hydrogen Dome ORU delivery has been accelerated to May 2011

Oxygen Generator Assembly Status

Status/Forward Work: OGA is OPERATIONAL Pump ORU I-Level maintenance and sparing strategy:

S/N 001 will remain installed without I-level maintenance of dP sensor S/N 002 will return on ULF5 for TT&E S/N 003 will launch on ULF5 and remain as on-orbit spare

Determine Recirc Loop water quality remediation strategy Launching high accuracy pH strips on 39P Single Cell pH test on going at Hamilton to characterize pH changes in recirc loop Conduct TT&E on Hydrogen dome returned on ULF5 and analysis of water returned in dome Determine frequency of loop flushing and pH testing Effort to launch ACTEX filter and adapter hoses on ULF5

AR racks were relocated to their permanent locations the week of 6 Sept 10 AR1 in Lab; two -3 Desecant/Absorbent beds (DABs) AR2 in Node 3; two -2 beds

Two additional -3 CDRA DABs will fly on ULF5 & ULF6 to replace -2 DABs in AR2 CDRA Four -3 DABs on-orbit will bridge time to -4 DAB deliveries w/o CDRA ops limitations Dash 2 beds will be returned to ground prior to Shuttle retirement to support -4 deliveries

Carbon Dioxide Removal Assembly Status

AR1 (Lab) issues following rack installation Initial activation failed due to an unmated electrical connector

Connector was mated and latched fault was cleared Subsequent activation failed due to an inability to pump down the 201 bed circuit

Signature was consistent with leakage of a hydraflow fitting Troubleshooting was performed on 9/13, a leaking hydraflow was identified and fixed Bed 201 was successfully pumped down

Current Status: AR1 CDRA is available for dual bed operations

Carbon Dioxide Removal Assembly Status

AR2 (Node 3) issues following rack installation Initial activation failed due to no response from Air Vent Valve (AVV) 106

Most likely cause believed to be a loose electrical connection at the Rack Interface Panel (RIP)

AVV 106 was subsequently recovered with a power cycle Should AVV 106 have further problems, the connector at the RIP will be inspected.

During operation, CDRA failed due to the Air Save Pump not operating Apparent cause is the perceived state of the Pump Motor Controller did not match the

actual state With the controller state out of synch, proper commanding could not be provided to the Air

Save Pump Pump was commanded off and then on to re-synch the correct states, at which point

CDRA was returned to nominal operation Further investigation is required to determine the cause of the controller state

disagreement, but the CDRA is operating nominally at this time. Current Status: AR2 CDRA is available for dual bed operations

Carbon Dioxide Removal Assembly Status

DESICCANT BED(DESORBING)

AIRINLET

AIRRETURN

PT

Air with CO2, H2OAir with CO2 (no water)Air without CO2, H2OAir with H2O (no CO2)

T T

P

ASV101

ASV102

Bed Evacuation

Space VacuumAir Save Bulkhead

Isolation Valve

Open RackIsolation Valve

Vacuum LinePressure

ELECTRICALHEATERS

DESICCANT BED(ADSORBING)

T1T2T3

CO2 ADSORBENT BED (8)(ADSORBING)

ASV103

5A

BLOWER

PRECOOLER

5A

ITCSINLET ASV104 CSV105

AVV106

T1T2T3

PUMPABSOLUTEPRESSURE

AIR SAVEPUMP

SG 13X13X

SG 13X13X

CO2 ADSORBENT BED (7)(DESORBING)

P

1.5” Sock Filter0.5” Sock Filter

CHECKVALVE

(CLOSED)

CHECKVALVE(OPEN)

CDRA Schematic

ISS Top Program Risk MatrixAugust 18, 2010 PRAB

28

Corrective/Preventative ActionsNone

4 3 1

1 3 1 1

1

1

LIKELIHOOD

5

4

3

2

1

1 2 3 4 5CONSEQUENCE

Risks (L x C)

Continual ImprovementNone

Low Medium High

C – Cost S –Schedule

T –Technical Sa – Safety

– Top Program Risk (TPR)

– Proposed Top Program Risk (TPR)

Score: 4 x 5 2810 - Russian Segment (RS) capability to provide

adequate MM/OD protection - (OM) - (C,S,T,Sa)

Score: 3 x 5 5688 - ISS Solar Array Management Operations

Controls and Constraints - (OM) - (C,S,T,Sa)

Score: 4 x 4 5456 - ISS Budget and Schedule - (OH) - (C,S,T) 6137 - GCTC Transition Resulting in Loss of Quality

Soyuz and Russian Segment Instructors - (CA) -(C,S,T,Sa)

6169 - On-Orbit Intracranial Hypertension - (SA) -(C,S,T,Sa)

Score: 4 x 3 6093 - Oxygen Processing Function - (OB) - (T) 6096 - Urine Processing Function - (OB) - (T) 6032 - On-Orbit Stowage Short-Fall (Pressurized

Volume) - (OC) - (T,Sa) 6141 - Water Processing Assembly (WPA) Function -

(OB) - (T)

Score: 3 x 4 5733 - COTS Integration Impact on ISS Program

Resources - (ON) - (C,S,T,Sa)

Score: 3 x 3 6116 - Regen ECLSS Functional Availability - (OB) - (T) 5184 - USOS Cargo Resupply Services (CRS) Upmass

Shortfall - 2010 through 2015 - (ON) - (C,S,T) 6039 - Carbon Dioxide Removal Assembly (CDRA)

Function - (OB) - (C,T,Sa)

Score: 3 x 2 5871 - Potential Sharp Edge Sources on ISS Truss and

Elements - (OB) - (C,S,T,Sa)

Score: 2 x 4 6167 - Vulnerability of CCS Tier 1 MDMs - (OD) -

(C,S,T,Sa)

Score: 1 x 5 6028 - Positive voltages on the ISS Truss

elements at high latitudes represent a shock hazard to EVA crew - (OM) - (C,S,T,Sa)

Risks (L x C) Continued