When discussing design considerations, it was rightly noted the need for a qualified person to do the design. Are there any specific certifications or qualifications required for this role? Any recommended trainings?

Refer to the white paper completed by the HSP for LH2. The same criteria should be applied to
a vent system. See below.

H2Tools Document Library: White_Paper-Qualified_Individuals_for_Liquid_Hydrogen 

Similar qualifications for vent system design include:

1. A “qualified” individual for liquid hydrogen should be qualified in all aspects of vent systems, as discussed in the categories listed below. Questions are included for each category to help ascertain if the hydrogen expert is qualified.
2. Hydrogen Properties
   1. Is the individual aware of the pressure and temperature design requirements of vent system
   2. Is the individual aware of the flow rates from a vent stack and the potential hazards to the
      surroundings with a liquid/gaseous hydrogen release?
3. Design
   1. Has the individual previously designed and managed the installation of GH2 and LH2 vent systems?
   2. Is the individual familiar with the hydrogen vent codes
   3. Does the individual understand how relief device set points and flow rates are determined for the vent system (examples may include understanding that the relief devices must be designed for overfill from a transport pump, heat leak, fire, loss of vacuum, and runaway tank pressure control)?
   4. Does the individual understand how to calculate back pressure in the vent system from flowing devices?
   5. Does the individual understand the mechanical design needs for the vent systems (e.g., cold temperatures for LH2 thermal expansion, liquid air, and ice)?
4. Process Equipment and Properties of Materials
   1. Is the individual aware of how a GH2 or LH2 vent system is typically piped
   2. Does the individual know what materials of construction are typically used with vent systems and their supports
   3. Has the individual calculated expansion contraction rates of metals involved in liquid hydrogen storage or movement?
5. Safety Systems and Reviews
   1. Has the individual led or facilitated a hazard review for vent systems?
   2. Is the individual aware of the safety systems connected to a vent system and their maximum flow rates?
6. Emergency Procedures
   1. Does the individual have knowledge of emergency procedures for a hydrogen system? What is the basis of this knowledge?
   2. Has the individual trained any fire departments on the system design, the hazards of hydrogen, and the safety systems associated with hydrogen’s use?
7. Operations (current and historical)
   1. How many operating hydrogen systems has the individual visited and studied?
   2. What historical problems have the individual observed with a hydrogen system (example may include incorrect expansion contraction calculations, icing of lines, vent systems)?
   3. Does the individual understand how to review the system for correct components, pressure rating, pressure testing, and venting (examples may include an operational readiness inspection)?
   4. Does the individual understand how changes are made and documented from design through installation/startup, and during operations (for example, a management of change process)?
   5. Does the individual understand how the training of onsite personnel for the vent system will be accomplished, and what to include in the scope of the training?
   6. Does the individual understand the operation of a vent system and the associated dangers (water condensation, venturi air pulled into the vent system, etc.)
8. Maintenance
   1. Has the individual worked on a hydrogen system on site during initial construction and after the hydrogen system is active? 
   2. Does the individual understand how a hydrogen system is purged (examples may include purging with nitrogen, if warmed to ambient conditions, or purging with helium, if at liquid hydrogen temperatures) prior to opening for repair?