Procedural
Requirements
Effective Date: February 03, 2022
Expiration Date: February 03, 2027
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NASA Procedural Requirements |
NPR 8715.26 Effective Date: February 03, 2022 Expiration Date: February 03, 2027 |
| | TOC | Preface | Chapter1 | Chapter2 | Chapter3 | Chapter4 | AppendixA | AppendixB | AppendixC | AppendixD | AppendixE | AppendixF | AppendixG | ALL | |
E.1 A general outline of where nuclear flight safety activities reside within the typical NASA mission life-cycle is shown in Table 4, for missions involving space nuclear systems (SNS).
Table 4: Notional Process Flow of Nuclear Flight
Safety-related Activities for SNS Missions
| Pre-Phase A: Concept Studies | Phase A: Concept & Technology Development | Phase B: Preliminary Design & Technology Completion | Phase C: Final Design & Fabrication | Phase D: System Assembly Integration & Test, Launch & Checkout | Phase E: Operation & Sustainment | Phase F: Closeout |
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| Note: This is a notional (simplified) representation. Not all activities are relevant for all missions, and timings will vary. | ||||||
| Conducting design/risk trade studies1 | Sizing of SNS requirements1 Defining system safety requirements1 Nuclear-related testing and analysis1 Mission design decisions affecting radiological risk1 Notifying NFSO before SDR/MDR to schedule activities | Databook general input development Deliver Safety Design Strategy (SDS) or equivalent Preliminary tier determination | Launch vehicle selection1 Databook delivered Mission SAR development Provisional final tier determination RCP planning Security planning Consultation with Office of General Counsel | Final mission SAR delivered Final tier determination Launch auth. request Mishap preparedness and RCP Emergency planning Security execution1 Agency views (if applicable) | Mission response to anomalies SMA monitoring of mission events or conditions relevant to nuclear flight safety | Decommissioning and disposal |
| INSRB Standing Board Activities1 | Familiarization and nuclear design discussions for novel missions1 | SDS review and gaps / recommendations identification Mission-specific Review Plan/Team1 | Mission SAR interactions Advise agency head of gaps and omissions | Final SER delivered | ||
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SNS development, improvement, and sustainment activities.1 Maintaining the necessary technical competencies and procedures to promote nuclear flight safety under all reasonably foreseeable conditions.1 Developing, maintaining, and implementing training and procedures to promote nuclear safety and safety culture.1 Using risk analysis to assess the effectiveness of design features and controls and to provide feedback to the design process.1 Standing coordination interface between NEPA and nuclear flight safety activities. Reporting and briefing requirements to OSTP, per NSPM-20. |
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1 While important, these are not aspects covered in this directive. They are covered by other NASA requirements and processes, DOE or NRC authorities and requirements, INSRB guidance, and in some cases, they would be addressed in future NASA nuclear flight safety guidance.
E.2 A notional schedule of launch authorization-related activities is provided in Figure 2 (for Tier I missions) and Figure 3 (for Tier II and III missions).
Figure 2: Notional Schedule for Tier I Missions
Figure 3: Notional Schedule for Tier II and Tier III Missions
| TOC | Preface | Chapter1 | Chapter2 | Chapter3 | Chapter4 | AppendixA | AppendixB | AppendixC | AppendixD | AppendixE | AppendixF | AppendixG | ALL | |
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