AMS Configuration Control Board

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AMS Configuration Control Board
CR AMS-02/D-014 Multi-Layer Insulation for the
Alpha Magnetic Spectrometer Requirements
Document (JSC 65095)
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Comments for AMS-02/D-014

• CCB Member Responses
• Steve Porter, Chair No Comment/Recommendation
• Trent Martin (EA) Approved as Written
• Paul Nemeth (ESCG) Approved as Written
• Mark Schmalz (EA2) No Comment/Recommendation
• Ann Vaughan (DA) No Comment/Recommendation
• J. J. Conwell (MA) Approved as Written
• John Stanford (NT) Approved with Comments
• Win Reid (OZ) Approved with Comments
• Jack Keifenheim (KSC) No Comment/Recommendation
• Bill Hungerford (AMS) Approved with Comments

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Comments for AMS-02/D-014

• Mandatory Evaluator Responses
• Craig Clark Approved with Comments
• Christian Vettore Approved with Comments
• Marco Molina Approved with Comments

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Comments for AMS-02/D-014
Comments from John Stanford Para 1.0
Introduction Since this is a requirements
document, Add subparagraphs 1.3 Applicability
who does it apply to how is it binding on
them 1.4 Waivers and Deviations If compliance
to requirements is not possible, what is the
waiver or deviation process? 1.5 Revisions and
Changes Evaluation of Non-incorporation No clear
established applicability, waiver or deviation
process, change or revision process.
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Comments for AMS-02/D-014

• Comments from John Stanford
• Para. 2.0 Reference Documents
• Since this is a requirements document, then
  there must be traceability to parent
  requirements. Therefore, there parent
  requirements are contained in "applicable"
  documents. Further, documents that are used in a
  "requirements statement" are applicable
  documents. For example, SP-R-0022, SSP 30233F,
  JSC 29789, JSC 63134, JSC 27301, JPR 5322F and
  others are part of requirements statements in
  this document.
• Change To 2.0 Documents 2.1 Applicable
  Documents 2.2 Reference Documents 2.3 Order
  of Precedence
• Evaluation of Non-incorporation Requirements
  traceability is not clearly established.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Para. 2.0 Reference Documents
• When updating this document, add JSC 63164,
  Quality Management Plan for the AMS-02 Experiment
  to the "applicable document" list.
• Evaluation of Non-incorporation Requirements
  traceability is not clearly established.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Para. 3.0 Requirements
• Problem "However, for some of these elements,
  there may be no requirement. For example, impact
  protection is addressed but is not a
  requirements for MLI blanket fabrications.
• These are very confusing statements. Why isn't
  impact protection a requirement?
• Recommendation 1 Re-write this area to CLEARLY
  summarize the development of requirements for MLI
  blanket fabrication and handling
• Evaluation of Non-incorporation Requirements
  traceability is not clearly established.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Figures 1 and 2
• Problem Where do these fit into the text?

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Comments for AMS-02/D-014

• Comments from John Stanford
• Figures 1 and 2
• Problem Where do these fit into the text?
• Para. 3.1.3 Impact Protection
• From The MLI blankets are intentionally not
  designed to provide micrometeoroid and orbital
  debris shielding?
• To Deleted.
• Rationale This is a requirements document for
  fabrication and handling and has no bearing on
  MMOD.
• Evaluation of Non-incorporation Confusing and
  misplaced requirement.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Para. 3.1.1 AMS Thermal Environment
• From Verification shall be by review of design
  and materials.
• To Verification shall be by Test or Analysis.
• Rationale 1 Test with unproven materials. The
  material composition of the blanket must be shown
  to meet the -150 degree C to 120 degree C
  requirement.
• Rationale 2 For proven materials, analysis
  should be sufficient to establish that the
  requirement is met.
• Evaluation of Non-incorporation Inappropriate
  verification of a requirement.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Para. 3.1.2 Depressurization and repress
• From Verification shall be by analysis and
  review of design.
• To Verification shall be by Test or Analysis.
• Rationale 1 Test with unproven materials. The
  material composition of the blanket must be shown
  to meet this requirement.
• Rationale 2 For proven materials, analysis
  should be sufficient to establish that the
  requirement is met
• Evaluation of Non-incorporation Inappropriate
  verification of a requirement.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Para. 3.1.4 Radiation
• From The MLI blankets shall not be damaged by
  UV radiation or atomic oxygen, therefore MLI
  blankets that are directly exposed to the
  environment shall have a UV and atomic oxygen
  resistant outer cover.
• To MLI blankets that will be directly exposed
  to UV radiation and atomic oxygen shall have a UV
  radiation and atomic oxygen resistant outer
  covering.
• Rationale The first statement has two "shall"
  statements. The way the first requirement is
  written, you must verify the (1) ALL blankets are
  not damaged by UV radiation or atomic oxygen and
  (2) that those "directly exposed the environment"
  are equipped with the resistant covering.
• Evaluation of Non-incorporation Unnecessary
  verifications.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Para. 3.1.5 Solar Electromagnetic Radiation
• From MLI exposed to the entire solar
  electromagnetic spectrum shall not embrittle or
  show significant changes in physical properties
  during its useful life.
• To MLI exposed to the entire solar
  electromagnetic spectrum shall not embrittle or
  show significant changes in physical properties
  during its use life as defined in paragraph
  3.5.1.
• Rationale The first statement as written is
  NOT verifiable.
• Evaluation of Non-incorporation Cannot be
  verified.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Para. 3.1.6 Solar Ionizing Radiation
• From Solar ionizing radiation issues are not
  within the scope of this document.
• To Deleted.
• Rationale This is not a requirement. If it is
  important, then it should be addressed elsewhere
• Evaluation of Non-incorporation Useless chatter.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Para. 3.2 Contamination
• From Contamination including subparagraphs
  3.2.1 and 3.2.2.
• To Deleted.
• Rationale This is not a requirement. If it is
  important during FABRICATION and HANDLING, then
  write as real requirements
• Evaluation of Non-incorporation Useless clutter
  in document.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Para. 1.1 Purpose
• From This document provides the requirements
  for the fabrication and handling of multi-layer
  insulation (MLI) for the Alpha Magnetic
  Spectrometer project.
• To This document provides the requirements for
  fabrication, handling, storage, and repair of
  MLI.
• Rationale This document mixes apples and
  oranges when it comes to requirements. For
  instance, paragraph 3.1 Operational Requirements
  and subparagraphs are important to know, but
  they should be in a specification document. The
  purpose only addresses "fabrication and
  handling", yet there paragraphs on storage and
  repair.
• Evaluation of Non-incorporation Confusing
  document.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Paragraphs 3.1 Operational Requirements, 3.5
  Maintainability and Reliability, and 3.6
  Materials Specifications
• From Inclusion in the documents.
• To Deleted.
• Rationale These "requirements" are related to
  "MLI specifications", therefore should not be in
  this document.
• Evaluation of Non-incorporation Requirements
  that are not related to the purpose of the
  document.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Paragraphs 3.3 Quality Assurance Provisions
• From The MLI shall be designed and fabricated
  in accordance with the Quality Management Plan
  for the Alpha Magnetic Spectrometer (AMS-02)
  experiment.
• To 3.3.1 MLI fabricated at JSC shall follow
  the provisions of JPR 5335.3, JSC Quality
  Manual.
• 3.3.2 MLI fabricated at Collaboration shall
  follow the provisions of JSC 63164, Quality
  Management Plan for the AMS-02 Experiment.
• Rationale
• Evaluation of Non-incorporation Inappropriate
  quality processes.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Title
• From Multi-Layer Insulation for the Alpha
  Magnetic Spectrometer Requirements Document
• To Requirements Document for MLI Fabrication,
  Handling, Storage and Repair
• Evaluation of Non-incorporation Inappropriate
  title.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Paragraph 3.4.1 In Fabrication Handling
• From It is recommended that an ISO Class 8
  (Class 100,000) or better clean room be used for
  the initial manufacture of all Thermal Blankets.
  In the event that a blanket is manufactured in a
  facility that does not meet these requirements,
  this information must be brought to the attention
  of the Thermal Working Group. Buy-off by the
  Thermal Working Group will be required prior to
  flight certification.
• To 3.4.1.1 Fabrication Facility
• Fabrication shall be in a a facility that meets
  the requirements of paragraph 3.8.
• Rationale Redundant to paragraph 3.8.
• Evaluation of Non-incorporation Inefficiency.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Paragraph 3.4.1 In Fabrication Handling
• From All tools, work tables, equipment,
  templates, holding fixtures, sewing machines or
  other structures that may contact the MLI shall
  be cleansed before use with a solvent having a
  nonvolatile residue not exceeding 0.02 g/L.
  Compatibility of solvents with MLI materials and
  surfaces that are in contact with MLI materials
  must be assessed before use.
• To 3.4.1.3 Cleanliness of Equipment, Tools and
  Other structures.
• All tools, work tables, equipment, templates,
  holding fixtures, sewing machines or other
  structures that may contact the MLI shall be
  cleansed before use with a solvent having a
  nonvolatile residue not exceeding 0.02 g/L.
  Compatibility of solvents with MLI materials and
  surfaces that are in contact with MLI materials
  must be assessed before use.
• Rationale Too many shalls in a paragraph,
  violates good requirements writing.
• Evaluation of Non-incorporation Inefficiency.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Paragraph 3.4.1 In Fabrication Handling
• From Work tables and sewing machines shall have
  clean protective covers when not in use.
• To 3.4.1.4 Protective Covers.
• Work tables and sewing machines shall have clean
  protective covers when not in use.
• Rationale Too many shalls in a paragraph,
  violates good requirements writing.
• Evaluation of Non-incorporation Inefficiency.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Paragraph 3.4.1 In Fabrication Handling
• From Workers shall wear clean laboratory smocks,
  powder-free latex gloves or clean white gloves,
  and footwear that is kept in the laboratory
  change/locker area when not used or use
  disposable footwear covers.
• To 3.4.1.5. Laboratory Clothing
• Workers shall wear clean laboratory smocks,
  powder-free latex gloves or clean white gloves,
  and footwear when handling or working with MLI.
  Clothing WILL be kept in the laboratory
  change/locker area when not used or use
  disposable footwear covers. .
• Rationale Too many shalls in a paragraph,
  violates good requirements writing.
• Evaluation of Non-incorporation Inefficiency.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Paragraph 3.4.1 In Fabriaction Handling
• From Large items of equipment being moved into
  a clean room must be thoroughly vacuumed prior to
  entry..
• To 3.4.1.6. Large items of equipment being
  moved into a clean room SHALL be thoroughly
  vacuumed prior to entry..
• Rationale Too many shall in a paragraph,
  violates good requirements writing.
• Evaluation of Non-incorporation Inefficiency.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Paragraph 3.4.3 Installation Handling
• From The clean blankets shall be removed from
  their packages in a clean area. Personnel should
  wear powder free gloves to handle the unpacked
  blankets.
• To Delete " Personnel should wear powder free
  glove to handle the unpacked blankets". Powder
  free gloves are not defined..
• Rationale A person could wear leather gloves
  (inappropriate), yet comply with the "powder
  free' statement.
• Evaluation of Non-incorporation Confusion.

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Comments for AMS-02/D-014

• Comments from John Stanford
• Paragraph 3.4.4 Repair
• From Repairs shall be done either in place or
  in controlled clean area depending on the extent
  of damage.
• To Define "in place."
• Rationale .
• Evaluation of Non-incorporation Confusion.

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Comments for AMS-02/D-014

• Comments from Bob Miley/Win Reid
• Electrical Paragraph 3.6.2 of MLI document
  states that the Electrical Bonding Grounding
  requirements are per NASA/TP-1999-209263. My
  understanding is that the correct compatible
  requirements for ISS Electrical Bonding and
  Grounding of AMS MLI requirements needs to be
  compatible with the SSP 30240 and SSP 30245.
• Electrical General The Electrical Bonding and
  Grounding for Space Shuttle is not addressed in
  the AMS MLI requirements document.

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Comments for AMS-02/D-014

• Comments from Bob Miley/Win Reid
• Thermal and Contamination - Editorial The MLI
  Requirements specify that an MLI blanket with an
  aluminized reinforced polyimide inner layer.
  These blankets are delicate and damage to the
  inner layer provides a path for atomic oxygen to
  reach the inside. Damage to the inner layer
  frequently happens during assembly. Atomic
  oxygen will cause the blanket to delaminate and
  spread debris, sometime after approximately 5
  years. Therefore, the proposed AMS MLI design
  must meet the following ISS SSP 30426
  requirements, which are applicable to the MLI
  blankets for station. (Continued on next slide)

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Comments for AMS-02/D-014

• Comments from Bob Miley/Win Reid
• SSP 30426 - 3.4.2 PARTICULATE BACKGROUND - The
  release of particulates from the ISS shall be
  limited to one particle 100 microns or larger per
  orbit per 1x10-5 steradian field of view as seen
  by a 1 meter diameter aperture.
• SSP 30426 - 3.5.2 SOLIDS, PARTICULATES, AND
  LIQUID RELEASES - Solids, particulates and liquid
  releases shall not result in residual deposits as
  indicated in paragraph 3.5.1 or damage to the ISS
  surfaces from either direct or subsequent orbital
  impingement.