Flight Safety Status

Leland D. Hill AMS-02 Technical Interchange Meeting - JSC - April 2007

1

Flight Safety Status


2

Phase II Flight Safety Review

We are “Penciled In” for a May 21-25, 2007 Phase II Safety Review with the Payload Safety Review Panel. Won’t be in “Ink” on the PSRP Calendar until we

submit the Phase II Safety Data Package. Required to have the Phase II Safety Data Package

complete and submitted before March 30, 2007. Because of the package’s size (~1000 pages) and the

complexity of the AMS-02 the PSRP assigned Payload Safety Engineers have asked for an earlier delivery if possible to allow for time for their experts to review.


3

Reminder

The Phase II Flight Safety Review is: The formal audit of the AMS-02 design for compliance

with all the safety requirements and requirements imposed through safety.

Supposed to occur when the design is 80% complete and there is less than 20% built. We are well past this point.

Where the verification approach for all hazard controls is reviewed and approved by the Payload Safety Review Panel.

The most detail oriented and grueling of the safety reviews.


4

PSRP Review

We are going to be relatively unique in the PSRP’s recent experience We are very large, very complex with a myriad of

integrated systems that are not like what is commonly addressed in recent history

We have cryogenics and superconducting magnets We are the first large payload to go on the ISS

Truss We are not an ISS Program or ISS Partner Payload


5

PSRP Review History

MEETING DATE

Phase 0/I Flight Safety Review

January 16, 2001

Vacuum Leak TIM October 11, 2001

Gauss Limits TIM October 16, 2001

Vacuum Leak/ Venting TIM

January 17, 2003


6

PSRP Review

More than Six Years will have passed between the Phase 0/I and the Phase II

The PSRP we met at Phase I has changed, and the PSRP of today does not know the AMS-02 and has different priorities and views.

Our package must be thorough, complete and accurate.

The Hazard Reports will be our signed contract with NASA for assuring the safety of AMS-02 during its mission. The hazard reports need to be accurate.


7

PSRP Review

When submitted the Payload Safety Engineers (PSEs) working for the PSRP will review package for appropriate content before officially approving us to be scheduled for the Phase II. We have new PSEs

Mr. R B. Rehm (SAIC/GHG) Mr. D. M. Santiago (SAIC/GHG)


8

Flight Safety Data Package

The Flight Safety Data Package was baselined through the AMS-02 CCB in May 22, 2006

Hazard Reports and the Text have been updated since and will have to be taken back to the CCB.

All revisions need to be in place prior to this CCB Review. We need everyone ready to say “Approved” when it arrives at the CCB, not modify it then with comment.


9

Package Status

In general the package is in good shape. We are still filling some holes in the data. The package was a snapshot of what we knew

a year ago. Data in the SDP needs to be brought in line with

today. Includes the Descriptive Text Includes the Hazard Reports


10

Specific Needs

All Structural and Fracture Control Summary Tables of AMS-02-F01 need to be reviewed and updated for accuracy and completeness. Applies to all hardware providers

The Pressure System Table in AMS-02-F03 must to be reviewed and updated for accuracy and completeness This hazard report is dedicated to Scientific

Magnetics Hardware


11

Specific Needs

All Pressurized Systems Tables in AMS-02-F05 need to be reviewed and updated for accuracy and completeness Applies to Scientific Magnetics, TRD Gas, TCS, TTCS systems and

Cryocoolers. TRD has indicated additional/changed components during this TIM,

these need to be updated in tables and descriptions.

Schematics of pressurized systems in AMS-02-F03 and AMS-02-F05 need to be reviewed and updated for accuracy and completeness. Applies to Scientific Magnetics, TRD Gas, TCS, TTCS systems and

Cryocoolers.


12

Specific Needs

HEATERS Ulrich Becker has supplied an excellent table for all

thermostatic control devices All other Thermostatic devices used associated with

Pressurized Systems are asked to follow suit. TTCS Heat Pipes TTCS Two Phase Loop (including Peltier Devices) TTCS OHP All other Heat Pipes with thermostatic control CAB Loop Heat Pipe Cryocooler


13

Example:TRD Thermostat Table

Location Temperature

Range Average

Temperature T

Open T

Close Tolerance Number

Xe Tank 20°C-65°C 42.5°C 49°C 38°C ±2.8°C 8 CO2 Tank 34°C-65°C 48.5°C 54 43 ±2.8°C 8

Tower 24°C-41°C 32.5°C 38 27 ±2.8°C 2 2 Valve Filters, 2

Valve GP50 5°C-39°C 22°C 27 16 ±2.8°C 4

4 Valve, Vent Valve

5°C-39°C 22°C 27 16 ±2.8°C 4+1

Box C 7°C-24°C 15.5°C 21 10 ±2.8°C 2+1 Preheater 34°C -65°C 48.5°C 54 43 ±2.8°C 8

TRD Gas Supply Thermostat List


14

Specific Needs

Non-standard Proof Testing Scientific Magnetics have established that a

number of components can not be tested to the required 1.5 x MDP proof value. Explanations need to be provided that can be attached to

hazard report on why the 1.5 test can not be used and explain the plan for testing specific components at lower levels and the rest of the system to required levels.

If any other yet unannounced components can not meet this requirement, they must also discuss this and document for the package.


15

Specific Needs

Pressurize System Graphics in AMS-02-F06 (and the text) of vents should be verified to be up to date representation of vent locations and descriptions. Scientific Magnetics

Cryosystem Warm Helium Gas Supply

TRD Gas


16

Specific Needs

Sections of the text we’re fairly sure are out of date or at least not the most accurate. TTCS, Section 5.13

Figure 5.13.7.1-4 TTCS Tube Routing Figure 5.13.7.2.1-1 TTCS Condensers 5.13.7.2.3 Accumulator 5.13.7.2.4 Pre-heaters 5.13.7.2.5 Start-up heaters 5.13.7.3 CO2 Freezing/Thawing

TCS 5.13.8 CAB Thermal Control

TRD 5.13.10 TRD Gas Supply Thermal Control


17

General Needs

EVERYONE Please make sure that any updates to Materials

Lists are Provided to ESCG/Chia Chang Please read the text and hazard reports.

Provide required updates to the text and graphics Check Graphics closely for old configurations, these need to

be updated or if correct graphics not available, the divergence from flight must be detailed.

Please review quoted numbers and other specific data for accuracy

Please supply any TBD placeholders you can.


18

General Needs

Everyone If you have any verifications you want to try and

close, contact Leland Hill or Chris Tutt Anomaly Reports and Resolutions must be

reported to the PSRP for Flight and Qual Hardware. Provide summaries that detail problem and resolution. Open anomalies or failures need to be provided and forward work described.


19

Of course it’s perfect, but in case it’s not…

Latest versions of modified text and hazard reports will be available at: url: http://ams-02project.jsc.nasa.gov/html/prephase2_SDP.htm

Please provide all corrections and update to ESCG/Leland Hill [email protected] Please provide excerpts or instruction and not a

redlined file (they are too big and will have to be transferred to the master document).


20

WHEN DO WE NEED IT?

Meeting Date – May 21-25, 2007 Required Delivery Date – March 30, 2007 Preferred Delivery Date – March 20, 2007 CCB Date for baselining new hazard reports

and Text – March 5, 2007 Comments needed to be turned in by –

February 16, 2007


21

Recap

Please review the current versions of Flight SDP Text and HRs

http://ams-02project.jsc.nasa.gov/

html/prephase2_SDP.htm Updates In by February 16, 2007


22

BUT WAIT! THERE WILL BE NEW ISSUES

We received word this morning of the new version of the Composite Overwrapped Pressure Vessel Requirements: We will need TRD Gas Vessels and Warm Helium Gas Supply

Vessel to show specific compliance to the new document. This will involve primarily Fracture Control Assessments and Providing the Damage Control Plans for inclusion in the Safety Data

Package

More Issues May Arise as we work with the PSRP representatives leading up to the Safety Review. Be Ready for emails alerts

Documents

Flight Safety Status