NAVSEAINST_System_Certification_Procedures_and_Criteria_Manual_for_Deep_Submergence_Systems.pdf

SYSTEM CERTIFICATION PROCEDURES

AND CRITERIA MANUAL FOR

DEEP SUBMERGENCE SYSTEMS

THIS DOCUMENT SUPERSEDES: NAVSEA P-9290

APPROVED FOR PUBLIC RELEASE. DISTRIBUTION IS UNLIMITED.

PUBLISHED BY DIRECTION OF COMMANDER, NAVAL SEA SYSTEMS COMMAND

SS800-AG-MAN-010/P-9290

REVISION A

0910-LP-018-2840 3 NOVEMBER 1998

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Date of Original pages is: 3 November 1998

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SYSTEM CERTIFICATION PROCEDURES AND CRITERIA MANUAL FOR

DEEP SUBMERGENCE SYSTEMS, NAVSEA SS800-AG-MAN-010/P-9290

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CNO Washington, DC (N873) COMLANTFLT, Norfolk, VA (N43) CINCPACFLT, Pearl Harbor, HI (N431TP) COMNAVSPECWARCOM, Coronado, CA (N914) COMNAVSURFLANT, Norfolk, VA (N434) COMNAVSURFPAC, San Diego, CA (N434) COMSUBLANT, Norfolk, VA (N4073) COMSUBPAC, Pearl Harbor, HI (N473) SDV TEAM TWO, Little Creek, VA SDV TEAM ONE, Pearl Harbor, HI EODMU SIX DET, Panama City, FL (E052) COMNAVSPECWARGRU ONE, San Diego, CA COMNAVSPECWARGRU TWO, Norfolk, VA DEEP SUBMERGENCE UNIT, San Diego, CA SIMA Norfolk, VA (10E) COMSUBRON TWO, Groton, CT (N40) COMSUBRON FOUR, New London, CT (N40) COMSUBRON SIX, Norfolk, VA (N40) COMSUBRON SIXTEEN, Kings Bay, GA (N40) COMSUBRON TWO TWO, La Maddalena, Italy (N40) COMSUBRON ONE, Pearl Harbor, HI (N40) COMSUBRON THREE, Pearl Harbor, HI (N40) COMSUBRON SEVEN, Pearl Harbor, HI (N40) COMSUBRON ELEVEN, San Diego, CA (N40) COMSUBRON FIFTEEN, Guam COMSUBRON SEVENTEEN, Bremerton, WA (N40) COMSUBDEVRON TWELVE, Groton, CT (N4) COMSUBDEVRON FIVE, San Diego, CA (N4) SUBDEVRON FIVE DET DIVING, Bangor, WA COMSUBGRU SEVEN, Yokosuka, Japan (N40) SUBRONSUPPU, Norfolk, VA (ATIS Administrator) SUBRONSUPPU, New London, CT

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ACN 1-1 Summary of Changes to the SYSTEM CERTIFICATION

PROCEDURES AND CRITERIA MANUAL FOR DEEP

SUBMERGENCE SYSTEMS, Rev A

Encl (1)

1. COVER

a. The cover page and inside cover leaf have been changed to provide the publication issue date and assigned National Stock Number. Revised to comply with the requirements for technical manuals.

2. CHAPTER 2 – THE SYSTEM CERTIFICATION PROCESS:

a. Paragraph 2.2.3.2. Scope of Certification Notebook: The change requires the SOC Notebook to specify the order of precedence when certification requirements conflict with the system drawings.

b. Paragraph 2.2.4. Certification Survey Plan. Wording changed to clarify that the Appendix K, Certification Survey Plan, is an example format.

c. Paragraph 2.4.2. DFS Administrative Control and Records: The change deletes sub-paragraph for Impact on design review as a tracking item in the master departure log. The item is not applicable to DSS-SOC DFS, as the review of design impact is handled as a cognizant engineering review process function.

3. CHAPTER 3 – REQUIREMENTS FOR CERTIFICATION:

a. Paragraph 3.2.4.1. Design Calculations. Provides sub-paragraph clarification for design calculations and analysis requirements for electrical equipment and systems.

b. Paragraph 3.2.4.2. Stress Analysis. Revises the Stress Analysis attribute example list to include other than load considerations by adding “and other factors” and adds the Effects of Corrosion.

c. Paragraph 3.3.3.3 MCD C Material Marking and Traceability. Revised to clarify intent of statement regarding verification of MCD C material at the time of installation.

d. Paragraph 3.5.b Quality Assurance. Delete reference to the canceled specification, Mil-Q-9858 (Quality Program requirements), from subject paragraph and Bibliography.

e. Paragraph 3.6. Test Performance. The change provides clarification regarding the Program Manger and SCA responsibilities for determination of and SCA monitoring of pre-certification testing.

SUBMERGENCE SYSTEMS Manual, Rev A (Cont)

f. Paragraph 3.6.3.5 Electrical Testing. Changed and clarified the paragraph testing requirements to resolve confusion regarding testing applicability. Added requirement to formalize the use of and documentation for calibrated electrical test equipment.

g. Paragraph 3.7.4 Manned Use of One Atmosphere DSSs in Pursuit of

Certification (or Reinstatement of Certification). Provides clarification to more specifically address the situations in which activities are authorized to conduct manned one atmosphere testing in pursuit of certification or reinstatement of certification.

NOTE: Replacement pages are provided for the entire Chapter 3 due to the number and scope of the changes made to this chapter.

4. APPENDIX A – CATEGORIZATION OF SOC MATERIALS AND COMPONENTS:

a. Table A-1, Category 1 Pressure Hull/Vessel Materials, Ferrous. Deleted the cancelled Military Specification, MIL-S-22698 for Steel Plate, Shapes and Bars, Weldable Ordinary Strength and Higher Strength, Structural and replaced it with the ABS specification, ABS Rules for Building and Classing Steel Vessels.

b. Paragraph A.8.a ELECTRICAL/ELECTRONIC SYSTEM MATERIALS.

Clarified OQE requirements for non-MIL-SPEC electrical/electronic materials.

5. APPENDIX B – DESIGN FACTORS FOR DEEP SUBMERGENCE SYSTEMS:

a. Paragraph B.11.2 Wiring Methods. The changes clarified the existing wording throughout the paragraph to more clearly define and document the cable Insulation Resistance (IR) measurement and temperature requirements.

(1) B.11.2.a – Deleted the details for hydrostatic testing requirements for cable exposed to sea water from this paragraph, as they are addressed in the new

APPENDIX M, TESTING REQUIREMENTS FOR ELECTRICAL COMPONENTS

EXPOSED TO AMBIENT PRESSURES GREATER THAN ONE ATMOSPHERE OR

SEA WATER.

(2) B.11.2. f – Inserted electrical considerations for designing electrical systems for use in oxygen-enriched atmosphere.

(3) B.11.2.g – Added reference for new APPENDIX M hydrostatic testing, electrical testing and documentation requirements.

b. Paragraph B.11.3 Ungrounded Systems. Provided clarification to the requirement of isolating the chassis from the DSS structure and personnel.

c. Paragraph B.11.5 Electrical Shock Hazards. Added the option to detect ground faults for requirement clarification. Deleted Appendix B reference.

d. Paragraph B.11.6 Insulation Considerations. Editorial change to delete arc resistance as an example of electrical functional characteristics.

e. Paragraph B.11.7.3 Electrical Hull Penetrator Protection. Deleted the word connector to clarify the event source.

f. Paragraph B.13.1 Sound levels. Revised the sound level exposure compliance determination and approval requirements and deleted existing Daily Number of Exposure/Maximum Allowable SPL Table.

6. APPENDIX I – RE-ENTRY CONTROL PROCEDURES:

a. Paragraph I.1 Introduction. Added sub-paragraph heading to separate the section and provide topic clarification.

b. Paragraph I.3 REC Closeout. Addresses the transfer of work from an open

REC to another administrative system to ensure work will be properly tested as specified.

c. Paragraph I.4 Re-Entry Control Form and Instruction Matrix. Correct and clarify the inconsistent requirements regarding the the use of standard REC format or locally developed REC format.

d. Paragraph I.7 Exceptions to Re-Entry Control. Revised the list of REC exemptions to more clearly define the items which are specifically exempted from REC by NAVSEA 0924-062-0010 and to identify the REC requirements for grinding on or to SOC or SUBSAFE hull structures.

NOTE: Replacement pages are provided for the Appendix I, text pages 1 through 6, due to the number and scope of the changes.

7. APPENDIX J – DSS PIPE AND PIPING COMPONENTS PRESSURE TESTING

REQUIREMENTS:

a. Paragraph J.3.b Definitions. Revised the definition for Hydrostatic (Strength & Porosity) Test to eliminate confusing specific testing statements that are stated elsewhere in the Appendix.

8. APPENDIX K – CERTIFICATION SURVEY PLAN:

a. Changed FEMA to read FMEA in the appendix and all sections where the term is referenced in the items to be certified column of the Certification Survey Plan.

9. APPENDIX M – TESTING REQUIREMENTS FOR ELECTRICAL COMPONENTS

EXPOSED TO AMBIENT PRESSURES GREATER THAN ONE ATMOSPHERE OR

SEA WATER:

a. BIBLIOGRAPHY Contents previously referenced in this appendix are to be relocated in its entirety to follow the INDEX. The revised BIBLIOGRAPHY is provided as new Pages “INDEX 8 though INDEX 18”. Insert new Appendix M in its place.

b. Developed the new appendix titled TESTING REQUIREMENTS FOR

ELECTRICAL COMPONENTS EXPOSED TO AMBIENT PRESSURES GREATER

THAN ONE ATMOSPHERE OR SEA WATER to clarify electrical testing and associated OQE requirements.

(1) The new appendix provides the minimum mandatory testing requirements for new and maintained electrical components with differential pressure greater than one atmosphere or those components exposed to seawater.

(2) The new appendix provides requirements for hydrostatic testing, joint tightness testing, insulation resistance, continuity, and the OQE necessary to document accomplishment of the testing.

10. BIBLIOGRAPHY - INDEX:

a. Revised the reference publications list and to reflect the following;

(1) Added Appendix A, Table 1 paragraph and page numbers to reference ABS Rules for Building and Classing Steel Vessels.

(2) Added Code of Practice for Safe Use of Electricity Underwater, dated September 1985.

(3) Deleted cancelled Mil Standard, MIL-S-22698 - Steel Plate, Shapes and Bars, Weldable Ordinary Strength and Higher Strength, Structural.

(4) Deleted cancelled Mil Standard, Mil-Q-9858, Quality Program Requirements.

(5) Revised reference page numbers as a result of adding the various ACN changes throughout the manual.

11. VARIOUS – EDITORIAL:

a. Table of Contents, List of Abbreviations and Acronyms. Changed FEMA (Failure Effects and Mode Analysis) to correctly read FMEA (Failure Mode and Effects Analysis).

b. Various sections of Chapters 1 and 2 were updated to reflect the NAVSEA organizational and nomenclature changes.

c. Section 3.3.4.1.d corrected the spelling of manufacturer’s.

d. Section 4.4 delete the second "the" from the last sentence of the last paragraph to correct editorial and grammatical error.

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SYSTEM CERTIFICATION PROCEDURES AND CRITERIA MANUAL FOR DEEP

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TABLE OF CONTENTS

CHAPTER 1 - General Information

1.1 Introduction ........................................................................................................................ 1 -1

1.2 Background ....................................................................................................................... 1 -1

1.2.1 History............................................................................................................................. 1 -1

1.2.2 Lessons Learned........................................................................................................... 1 -2

1.3 Certification Definitions .................................................................................................... 1 -3

1.3.1 Deep Submergence System........................................................................................ 1 -3

1.3.2 Deep Submergence System Personnel ..................................................................... 1 -3

1.3.3 Scope of Certification ................................................................................................... 1 -3

1.3.4 Scope of Certification Notebook ................................................................................. 1 -4

1.3.5 Surveys ........................................................................................................................... 1 -4

1.3.6 Objective Quality Evidence........................................................................................... 1 -4

1.3.7 Certification Survey Plan .............................................................................................. 1 -4

1.3.8 Certification Package ................................................................................................... 1 -5

1.3.9 Certification.................................................................................................................... 1 -5

1.3.10 DSS Certification ........................................................................................................ 1 -5

1.3.11 Letter of Certification .................................................................................................. 1 -5

1.3.12 Initial Certification........................................................................................................ 1 -5

1.3.13 Sustaining Certification .............................................................................................. 1 -5

1.3.14 Suspension of Certification........................................................................................ 1 -5

1.3.15 Reinstatement of Certification ................................................................................... 1 -5

1.3.16 Functional Audits ......................................................................................................... 1 -6

1.3.17 Technical Assistance Review (Tech Assist) ............................................................ 1 -6

1.4 Principal Participants ....................................................................................................... 1 -6

1.5 Basis for Initial DSS Certification ................................................................................... 1 -6

1.6 DSS Certification Process .............................................................................................. 1 -7

1.7 Documentation Hierarchy ................................................................................................ 1 -7

CHAPTER 2 - The System Certification Process

2.1 Introduction ........................................................................................................................ 2 -1

2.2 Application for Initial Certification ................................................................................... 2 -1

2.2.1 Plan of Action and Milestones...................................................................................... 2 -2

2.2.2 System Safety Program Plan....................................................................................... 2 -2

2.2.3 Proposed Scope of Certification................................................................................. 2 -6

2.2.3.1 Scope of Certification................................................................................................ 2 -6

2.2.3.2 Scope of Certification Notebook .............................................................................. 2 -8

2.2.3.3 Memorandum of Understanding ............................................................................... 2 -8

2.2.4 Certification Survey Plan .............................................................................................. 2 -8

2.3 Approval of System SOC Documents ............................................................................ 2 -9

2.4 Departure From Specification......................................................................................... 2 -9

ACN 1-1 ii

2.4.1 Processing Departures from Specification ............................................................... 2 -10

2.4.2 DFS Administrative Control and Records ................................................................. 2 -11

2.5 Technical Certification Requirements ........................................................................... 2 -12

2.6 Certification Package ..................................................................................................... 2 -13

2.7 Internal Certification Survey ............................................................................................ 2 -13

2.8 SCA Surveys .................................................................................................................... 2 -13

2.9 Operational Demonstration ............................................................................................ 2 -13

2.10 Issuance of C ertification ............................................................................................... 2 -14

2.11 Sustaining Certification................................................................................................. 2 -14

2.12 Modifications .................................................................................................................. 2 -15

2.13 Suspension of Certification .......................................................................................... 2 -15

2.14 Functional Audits ........................................................................................................... 2 -15

2.15 Process For Changing The Manual............................................................................. 2 -16

2.15.1 Change Submittal....................................................................................................... 2 -16

2.15.2 Change Status Accounting ........................................................................................ 2 -16

2.15.3 Manual Distribution .................................................................................................... 2 -16

CHAPTER 3 - Requirements For Certification

3.1 Introduction ........................................................................................................................ 3 -1

3.2 Design and Configuration Management ........................................................................ 3 -1

3.2.1 Summary Description of the DSS ............................................................................... 3 -2

3.2.2 Design Parameters ....................................................................................................... 3 -2

3.2.3 Subsystem Descriptions ............................................................................................... 3 -3

3.2.4 Design Analysis and Calculations ............................................................................... 3 -4

3.2.4.1 Design Calculations ................................................................................................... 3 -4

3.2.4.2 Stress Analysis ........................................................................................................... 3 -4

3.2.5 Drawings ........................................................................................................................ 3 -6

3.2.6 Operability and Maintainability..................................................................................... 3 -7

3.2.7 Justification of Materials ............................................................................................... 3 -7

3.2.8 Toxic and Flammable Materials ................................................................................... 3 -7

3.2.9 Atmosphere Analysis .................................................................................................... 3 -8

3.2.10 Vacuum in Manned and Floodable Spaces ............................................................. 3 -9

3.2.11 System Safety Program ............................................................................................. 3 -9

3.3 Material Control................................................................................................................. 3 -9

3.3.1 Definition of Material SOC Control Divisions ............................................................ 3 -10

3.3.1.1 Material Control Division A ...................................................................................... 3 -10

3.3.1.2 Material Control Division B ...................................................................................... 3 -10

3.3.1.3 Material Control Division C ...................................................................................... 3 -11

3.3.2 Material Procurement................................................................................................... 3 -11

3.3.3 Material Marking and Traceability .............................................................................. 3 -11

3.3.3.1 MCD A Material Marking and Traceability ............................................................. 3 -11

3.3.3.2 MCD B Mate rial Marking and Traceability ............................................................. 3 -12

3.3.3.3 MCD C Material Marking and Traceability............................................................. 3 -12

3.3.4 Receipt Inspection........................................................................................................ 3 -12 iii ACN 1-1

3.3.4.1 MCD A Receipt Inspection....................................................................................... 3 -12

3.3.4.2 MCD B Receipt Inspection....................................................................................... 3 -13

3.3.4.3 MCD C Receipt Inspection ...................................................................................... 3 -13

3.3.5 Verifi cation of Completion of Required Testing ........................................................ 3 -13

3.3.6 Installation Verification ................................................................................................. 3 -14

3.3.6.1 Installation Verification Requirement for MCD A, B and C Material.................... 3 -14

3.3.7 Material Transfer........................................................................................................... 3 -14

3.3.7.1 Material Certification Maintained ............................................................................ 3 -14

3.3.7.2 Material Certification Lapsed (DSS/Ship In Inactivation Availability) .................. 3 -15

3.3.7.3 Material Recertification Required............................................................................ 3 -17

3.4 Fabrication Process Control .......................................................................................... 3 -17

3.4.1 Work Procedures ......................................................................................................... 3 -17

3.4.2 Welding Procedures .................................................................................................... 3 -18

3.4.3 Brazing Procedures ..................................................................................................... 3 -18

3.4.4 Pipe Bending Procedures ........................................................................................... 3 -19

3.4.5 Cleaning Procedures ................................................................................................... 3 -19

3.5 Quality Assurance ............................................................................................................ 3 -20

3.5.1 Design and Drawing Control....................................................................................... 3 -21

3.5.2 Fabrication and Manufacturing Control...................................................................... 3 -21

3.5.3 Testing and Inspection Control.................................................................................... 3 -21

3.5.4 Calibration..................................................................................................................... 3 -22

3.5.5 Audits ............................................................................................................................. 3 -22

3.6 Test Performance ............................................................................................................ 3 -23

3.6.1 Development Tests ...................................................................................................... 3 -23

3.6.2 Quality Assurance Tests .............................................................................................. 3 -24

3.6.3 System Operation, Integration and Proof Tests ........................................................ 3 -24

3.6.3.1 Proof, Builder's Pre-Trial or Pre-Sea Trial Tests ................................................... 3 -24

3.6.3.2 Structural Testing ...................................................................................................... 3 -24

3.6.3.3 Fluid System Testing ............................................................................................... 3 -24

3.6.3.4 Cleanliness Testing ................................................................................................... 3 -25

3.6.3.5 Electrical Testing ....................................................................................................... 3 -25

3.6.3.6 Inclination Testing ...................................................................................................... 3 -27

3.6.3.7 Access to Vital Equipment ....................................................................................... 3 -27

3.7 Operational Demonstration and Trials Stage (Builder's Trials or Sea Trials)........... 3 -27

3.7.1 Certification Dive .......................................................................................................... 3 -30

3.7.2 Emergency Surfacing ................................................................................................... 3 -30

3.7.3 Test Dive Deficiencies................................................................................................. 3 -30

3.7.4 Manned Use of One Atmosphere DSSs in Pursuit of

Certification (or Reinstatement of Certification) ...................................................... 3 -31

3.8 Operating and Emergency Procedures ........................................................................ 3 -32

3.8.1 Operating Manual ......................................................................................................... 3 -33

3.9 Maintenance Procedures................................................................................................ 3 -34

3.9.1 Maintenance Requirement Card................................................................................. 3 -34

3.9.2 SOC Planned Maintenance Documentation ............................................................. 3 -35

ACN 1-1 iv

CHAPTER 4 - On -Site Certification Survey

4.1 Introduction ........................................................................................................................ 4 -1

4.1.1 Initial Certification Survey ............................................................................................. 4 -1

4.1.2 Sustaining Certification Survey.................................................................................... 4 -1

4.1.2.1 Sustaining Certification Survey Periodicity ............................................................. 4 -1

4.1.3 Reinstatement of Certification Survey......................................................................... 4 -1

4.2 Preparation For Survey.................................................................................................... 4 -2

4.2.1 Scheduling of SCA Surveys ......................................................................................... 4 -2

4.2.1.1 Work Control Program............................................................................................... 4 -2

4.2.1.2 Maintenance Requirement Status ............................................................................ 4 -3

4.2.1.3 Testing Procedure Status .......................................................................................... 4 -3

4.2.1.4 Departure Status ........................................................................................................ 4 -3

4.2.1.5 Certification Survey Plan ........................................................................................... 4 -3

4.2.1.6 Internal Survey Status ................................................................................................ 4 -3

4.2.1.7 Personnel .................................................................................................................... 4 -5

4.3 Survey Team Personnel................................................................................................... 4 -5

4.4 Certification Survey Cards............................................................................................... 4 -5

4.5 Survey Guidelines ............................................................................................................. 4 -6

4.6 Operational Demonstration ............................................................................................. 4 -6

CHAPTER 5 - Sustaining Certification

5.1 Introduction ........................................................................................................................ 5 -1

5.2 Policy.................................................................................................................................. 5 -1

5.3 Responsibilities ................................................................................................................ 5 -1

5.3.1 Program Manager and SCA Responsibilities ........................................................... 5 -1

5.3.2 Sustaining Activity Responsibilities............................................................................. 5 -2

5.3.3 Industrial Facility/Supervising Authority Responsibilities .......................................... 5 -3

5.4 Sustaining Certification Control Procedures ................................................................. 5 -3

5.4.1 Re -entry Control............................................................................................................. 5 -4

5.4.2 Work Procedures .......................................................................................................... 5 -4

5.4.3 Planned Maintenance Procedures .............................................................................. 5 -5

5.4.4 Temporary Modifications .............................................................................................. 5 -5

5.5 Test and Trials Stage ....................................................................................................... 5 -6

5.6 Sustaining Certification Survey ....................................................................................... 5 -6

5.7 Operating Limits ............................................................................................................... 5 -7

5.8 Continuation of Certification ............................................................................................ 5 -7 v ACN 1-1

LIST OF APPENDICES

APPENDIX A - CATEGORIZATION OF SOC MATERIALS AND COMPONENTS

A.1 INTRODUCTION.............................................................................................................. A -1 A.2 CATEGORY 1 MATERIALS .......................................................................................... A -1 A.3 CATEGORY 2 MATERIALS .......................................................................................... A -4 A.3.1 Structural Materials ...................................................................................................... A -4 A.4 CATEGORY 3 MATERIALS .......................................................................................... A -5 A.4.1 Pressure Hull/Vessel and Other Structural Materials ............................................... A -6 A.5 VIEWING WINDOW MATERIALS ................................................................................. A -7 A.6 FLOTATION MATERIALS .............................................................................................. A -7 A.7 HYDRAULIC SYSTEM FLUIDS .................................................................................... A -8 A.8 ELECTRICAL/ELECTRONIC SYSTEM MATERIALS................................................ A -8

A.9 FAIRING AND MISCELLANEOUS NONSTRUCTURAL MATERIALS .................... A -9

A.10 LIFE SUPPORT SYSTEM MATERIALS .................................................................... A -9

APPENDIX B - DESIGN FACTORS FOR DEEP SUBMERGENCE SYSTEMS

B.1 INTRODUCTION.............................................................................................................. B -1 B.2 STRUCTURAL DESIGN CONSIDERATIONS ............................................................ B -1 B.2.1 Fatigue .......................................................................................................................... B -2 B.2.2 Fracture Toughness ..................................................................................................... B -3

B.3 DESIGN STRENGTH PARAMETERS OF EXTERNALLY LOADED

PRESSURE HULLS/VESSELS, HARD STRUCTURES.......................................... B -4 B.3.1 Inelastic Stability........................................................................................................... B -5 B.3.2 Elastic Stability............................................................................................................. B -5 B.3.3 Stress Analysis............................................................................................................. B -5 B.3.4 Verification of Calculated Collapse Pressure........................................................... B -6 B.3.4.1 Testing Procedures/Test Instrumentation............................................................... B -7 B.3.5 Verification of As-Built Strength (Proof Test) ............................................................ B -7 B.3.5.1 Proof Testing Procedures/Instrumentation............................................................. B -8

B.4 DESIGN STRENGTH PARAMETERS OF INTERNALLY LOADED

PRESSURE VESSELS/HARD STRUCTURES ........................................................ B -8 B.4.1 Stress Analysis............................................................................................................. B -9 B.4.2 Verification of Calculated Design Operating Pressure ........................................... B -9 B.4.2.1 Testing Procedures/Test Instrumentation.............................................................. B -10

B.5 MISCELLANEOUS PRESSURE VESSELS AND HARD STRUCTURES............ B -10

B.6 DESIGN OF PENETRATIONS INTO AND THROUGH

THE PRESSURE HULL ENVELOPE......................................................................... B -10 B.6.1 Piping Penetrations .................................................................................................... B -11 B.6.2 Electrical Penetrations ............................................................................................... B -11 B.6.3 Viewports ..................................................................................................................... B -11 B.6.4 Hatches/Closures........................................................................................................ B -12 B.6.5 Seals ............................................................................................................................ B -12 B.7 MATERIAL SELECTION ............................................................................................... B -13

ACN 1-1 vi

B.7.1 Corrosion Resistance................................................................................................. B -13 B.7.1.1 Electrolytic Corrosion .............................................................................................. B -13 B.7.1.2 Stress Corrosion...................................................................................................... B -14 B.7.2 Toxicity ......................................................................................................................... B -14 B.7.3 Flammability ................................................................................................................ B -14 B.8 FABRICATION................................................................................................................ B -15 B.8.1 Fabrication, Welding and Brazing ............................................................................. B -15 B.8.2 Threaded Fasteners ................................................................................................... B -15 B.8.3 Locking Devices for Mechanical Fasteners............................................................. B -16 B.8.4 Prote ctive Finishes ..................................................................................................... B -16 B.9 NAVAL ARCHITECTURE DESIGN ............................................................................. B -16 B.9.1 Stability and Equilibrium ............................................................................................. B -16 B.9.1.1 Inclining Experiments and Trim Dives for Submersibles and Submerged Habitats ..................................................................................... B -17 B.9.2 Additional Conditions ................................................................................................. B -18 B.10 DESIGN OF PIPING SYSTEMS ................................................................................ B-18 B.10.1 Piping System Flexibility.......................................................................................... B -19 B.10.2 Piping Systems Component Structural Design Consideration ........................... B -20 B.10.2.1 Categories of Stress ............................................................................................. B -21 B.10.3 Design of Piping Systems and Components ........................................................ B -22 B.10.4 Hoses and Umbilical (Deck Shelters, Etc.)............................................................ B -23 B.10.5 Special Considerations for Oxygen Systems ........................................................ B -24 B.10.6 Piping System Design Verification......................................................................... B -25 B.10.7 Relief Valves ............................................................................................................. B -25 B.11 DESIGN OF ELECTRICAL SYSTEMS ..................................................................... B -25 B.11.1 Power Requirements................................................................................................ B -25 B.11.1.1 Batteries ................................................................................................................. B -25 B.11.2 Wiring Methods ......................................................................................................... B -25 B.11.3 Ungrounded System ................................................................................................. B -27 B.11.4 Fault Current Protection ........................................................................................... B -27 B.11.5 Electrical Shock Hazards......................................................................................... B -27 B.11.6 Insulation Considerations ......................................................................................... B -28 B.11.7 Electrical Connectors and Penetrators .................................................................. B -28 B.11.7.1 Electrical Connectors ............................................................................................ B -28 B.11.7.2 Electrical Penetrators............................................................................................ B -28 B.11.7.3 Electrical Hull Penetrator Protection.................................................................... B -29 B.11.8 Lighting Systems ...................................................................................................... B -29 B.11.9 Instrumentation .......................................................................................................... B -29 B.11.10 Communication Systems....................................................................................... B -29 B.11.11 Heating Systems .................................................................................................... B -30 B.12 PROPULSION SYSTEM............................................................................................. B -30 B.13 HUMAN ENGINEERING ............................................................................................. B -30 B.13.1 Sound Levels ............................................................................................................. B -30 B.13.2 Thermal Control......................................................................................................... B -31 B.14 LIFE SUPPORT SYSTEM .......................................................................................... B -31 vii ACN 1-1

B.14.1 Life Support System Design Specification............................................................ B -32 B.14.1.1 Closed Circuit Life Support Design Specification............................................. B -32 B.14.1.2 Open Circuit Life Support Design Specification................................................ B -33 B.14.2 Breathing Gas System General Design Considerations ..................................... B -33 B.14.3 Breathing Gas Equipment Considerations ............................................................ B -35 B.14.3.1 Breathing Gas Compressors ............................................................................... B -35 B.14.3.2 Stored Breathing Gas Supply .............................................................................. B -36 B.14.3.3 Carbon Dioxide Removal ..................................................................................... B -37 B.14.3.4 Breathing Gas Relief Valves ................................................................................ B -38 B.14.3.5 Instrumentation....................................................................................................... B -38 B.15 OPERATIONAL CONTROL SYSTEMS .................................................................... B -40 B.15.1 Control Power Supply............................................................................................... B -40 B.15.2 Control Actuators ...................................................................................................... B -41 B.16 FIRE PROTECTION SYSTEM ................................................................................... B -42 B.17 NAVIGATION SYSTEMS ............................................................................................ B -42 B.18 FOOD AND WATER SUPPLY................................................................................... B -42 B.19 WASTE SYSTEMS ..................................................................................................... B -42 B.20 RESCUE/RETRIEVAL SYSTEMS ............................................................................ B -43 B.21 HANDLING SYSTEMS ................................................................................................ B -43

APPENDIX C - TESTING PARAMETERS FOR PERMANENTLY OR TEMPORARILY

MOUNTED EXTERNAL IMPLODABLE AND EXPLODABLE ITEMS

C.1 INTRODUCTION ............................................................................................................. C -1 C.2 DEFINITIONS .................................................................................................................. C -3

C.3 DETERMINATION OF WHETHER OR NOT AN EXPLODABLE OR

IMPLODABLE IS CRITICAL OR NONCRITICAL ....................................................... C -4

C.4 TESTING REQUIRED FOR NONCRITICAL IMPLODABLE/

EXPLODABLE VOLUMES .......................................................................................... C -5

C.5 TESTING NECESSARY FOR CRITICAL IMPLODABLE VOLUMES...................... C -5

C.6 TESTING NECESSARY FOR CRITICAL EXPLODABLE VOLUMES .................... C -6

C.7 TEST RECORD OQE REQUIRED FOR CRITICAL IMPLODABLE

AND EXPLODABLE VOLUMES................................................................................. C -6

APPENDIX D - TESTING PARAMETERS FOR EXPLODABLE ITEMS DUE TO

DECOMPRESSION

D.1 INTROD UCTION ............................................................................................................. D -1 D.2 DESCRIPTION AND ORIENTATION............................................................................ D -1 D.3 TEST PROCEDURE ...................................................................................................... D -1 D.4 POROUS OR VENTED COMPONENTS .................................................................... D -2

APPENDIX E - DSS BREATHING GAS AND ATMOSPHERIC REQUIREMENTS

E.1 INTRODUCTION.............................................................................................................. E -1 E.2 BREATHING GAS CONSUMPTION............................................................................. E -1

ACN 1-1 viii

E.3 SURFACE BRE ATHING AIR REQUIREMENTS ........................................................ E -2 E.3.1 Surface Oxygen Requirements................................................................................... E -3 E.3.2 Carbon Dioxide Production and Toxic Effects ......................................................... E -5 E.3.3 Carbon Dioxide Removal........................................................................................