Thermal Blanket Support Process.pdf

DIRECTIVE NO. 549-PG-8071.0.2B APPROVED BY Signature: Original signed by:

EFFECTIVE DATE: September 23, 2020 NAME: David Robinson EXPIRATION DATE: September 23, 2025 TITLE: Code 549 Branch Head

CHECK THE GSFC DIRECTIVES MANAGEMENT SYSTEM AT

http://gdms.gsfc.nasa.gov TO VERIFY THAT THIS IS THE CORRECT VERSION PRIOR TO USE.

08/16

Procedures and Guidelines (PG)

COMPLIANCE IS MANDATORY

Responsible Office: Code 549/Environmental Test Engineering and Integration Branch Title: Thermal Blanket Support Process

PREFACE

P.1 PURPOSE

The purpose of this procedure is to identify the procedures and responsibilities for thermal blanket fabrication and installation.

P.2 APPLICABILITY

This procedure applies to thermal blanket work performed at the Goddard Space Flight Center, Code 549, and covers thermal blanket support that is in accordance with a Customer and/or Product Design Lead (PDL) supplied released design (build-to-print).

a. In this document citations are assumed to be the latest version unless otherwise noted.

b. In this document, all mandatory actions (i.e., requirements) are denoted by statements containing the term “shall.” The terms “may” or “can” denote discretionary privilege or permission; “should” denotes a good practice and is recommended but not required; “will” denotes expected outcome; and “are/is” denotes descriptive material.

P.3 AUTHORITY

549-PG-8700.1.1, Environmental Test Engineering and Integration

P.4 APPLICABLE DOCUMENTS AND FORMS

N/A

P.5 CANCELLATION

549-PG-8071.0.2A Thermal Systems Support

P.6 SAFETY

DIRECTIVE NO. 549-PG-8071.0.2B Page 2 of 6

EFFECTIVE DATE: 9/23/2020

EXPIRATION DATE: 9/23/2025

All hazards and controls are documented in individual manuals/documents used for template development and fabrication of thermal blankets.

P.7 TRAINING

Personnel receive on the job training for all Thermal Blanket Support operations

P.8 RECORDS

[Describe all records, including forms, recommended or required to carry out the requirements of the PG. In addition, identify, in a Records Table, all records and forms resulting from the PG, the record custodian(s), the record retention schedule, and associated retention period reflected in NPR 1441.1.]

Record Title Record Custodian Retention Training Records Supervisor and HR *NRRS 3/33C- DESTROY

OR DELETE 5 YEARS

AFTER SEPARATION OF

EMPLOYEE OR WHEN

NO LONGER NEEDED,

WHICHEVER COMES

FIRST

* NRRS 1441.1 – NASA Records Retention Schedule

P.9 MEASUREMENT/VERIFICATION

N/A

PROCEDURES

Responsibilities

1. The Thermal Blanket Support (TBS) Group receives a request for thermal blanket support from a project. The Thermal Blanket Support Lead for the project should meet with project personnel to review the task requirements.

2. The TBS Group and the Thermal PDL shall develop initial blanket design concepts to establish material requirements and quantity to fabricate flight and GSE blankets. The TBS Group, with written project approval, will order materials needed for the fabrication of the GSE and flight blankets, taking into account the expected need, fabrication, and material expiration dates.

DIRECTIVE NO. 549-PG-8071.0.2B Page 3 of 6

3. The TBS group will inspect upon receipt of material for shipping damage, matching material to order, and ensuring that required vendor supplied documentation, including Material Certifications (Certs), are included. For non-standard materials, a more intrusive inspection might be specified by the Thermal PDL. Tape and film are tested to verify lack of silicones or other outgassing materials according to the project Contamination Control Plan.

4. Materials failing inspection will be immediately (after inspection) returned to the vendor for replacement.

5. After the PDL provides a written released Work Order Authorization (or similar authorization for projects not using a WOA system), the TBS will proceed with bulk blanket layup, template development, and fabrication.

6. Templates are produced, by cutting and fitting approved film to the hardware, flight like mockup or flight hardware drawings (if drawings were provided by the project). Templates should include locations of hardware attach points, grounding and vent locations and design. Template design shall be checked and approved by the thermal PDL before fabrication of the blankets will start. Resulting templates can be transferred to drawings at the projects request and support.

7. Flight blankets are then fabricated from the approved templates and bulk blankets per the WOA. The flight blankets should be fit checked to the hardware and attach points should be finalized.

8. Following fabrication, the TBS Group will visually inspect the product to assure conformance with the design. The blankets shall then be weighed and recorded in the blanket log and/or WOA. The resistance of the blanket grounds shall be measured and recorded on the blanket log and/or WOA. If specified, these measurements may be witnessed and approved by project QA personnel at the discretion of the thermal PDL.

9. If required by the project, a blanket bakeout will be coordinated by the Thermal PDL with the Code 549 Space Simulation group. The bakeout should occur at either or both the bulk blanket layup or the fabricated blanket stage.

10. Thermal blanket technicians shall install and ground the thermal blankets in accordance with project approved requirements. Installed blankets will be inspected by the project and QA personnel at the discretion of the Thermal PDL. The appropriate WOA steps should be signed off by the TBS group.

Material certifications and grounding measurements shall also be included with the WOA if indicated.

11. The TBS Group will deliver the completed manufactured blankets, documents, and any spare material at request of the project and/or Thermal PDL, when the task is complete.

12. The templates will be offered to the project for archiving. If the project does not specify that they wish to retain the templates, the TBS group will store them for a minimum of 5 years after launch of project. Past the 5 years from launch or spacecraft storage, TBS will attempt to notify Code 545 Thermal Engineering branch management or project lead they are about to be disposed of. If after attempted contact with the thermal branch or project lead there is no response, the templates may be disposed of.

13. Signed off WOA indicates work completed to the satisfaction of the customer.

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Appendix A – Definitions Code 545 Thermal Branch Code 549 Environmental Test Engineering and Integration Branch Thermal PDL Project thermal engineer responsible for overseeing the blanket design and implementation TBS (Thermal Blanket Support) Group

Blanket lab personnel supporting the project

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Appendix B – Acronyms CERT Certification EPE Environmental Project Engineering GSFC Goddard Space Flight Center NASA National Aerospace and Space Administration PDL Product Design Lead QA Quality Assurance TSS Thermal Systems Support WOA Work Order Authorization

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CHANGE HISTORY LOG

Revision Effective Date Description of Changes

Baseline

04/30/2012 Initial Release

A

09/30/2015 Updated and rewrote entire document to reflect process used in the fabrication and installation of thermal blankets

B

9/23/2020 Revalidation with administrative revisions.

• Template update

• Replaced Branch Head

• 2 extra steps for clarity

• Updated records

For Best Practices refer to:

https://gs279gdmsias.gsfc.nasa.gov/GDMSv2/downloadFile.htm?docId=28819