Exhibit 6 5031 1 Piping Systems

ES&H Manual

FESHM 5031.1

March 2025

FESHM 5031.1: PIPING SYSTEMS

Author

Roza Doubnik
Michael White

Revision History
Description of Change
Updated document based on FRA transition to FermiForward

Clarified rules for performing proof tests in Section 5.5(e) for cases where Charpy impact testing exemptions are applied
Michael Geynisman, Added requirements for purchased unlisted components and piping Michael White
systems – Section 5.
Michael White
• Removed requirement for less than 20% of combined stress in order to qualify as low stress piping. Replaced with a rule for less than 20% of basic allowable stress
• Clarified rules for leak testing low stress piping in Section 6.0. Minimum leak test pressure set at 80% of relief device set pressure. Clarified that all requirements of FESHM 5034, including workflow processes, are to be applied to the leak test. Added requirement for required leak test sensitivity to be evaluated in engineering note. References to “pressure test” were replaced by “leak test” to maintain consistency with ASME B31.3 terminology
Michael Geynisman • Added “international” to the list of appropriate governing codes. • Updated Section 5, para.2 to distinguish between requirements for the piping systems per B31 codes and EN13480 standard.
• Updated Table 1 to indicate EN13480 as an applicable standard. • Updated Section 6 to include requirements for proof testing. • Updated Section 7 to distinguish between requirements for the Engineering Note for the piping systems per B31 codes and EN13480 standard.
• Added Technical Appendix 2 - EN13480-5 Table 9.4-1
Michael White
• Added low stress piping category
Terry Tope
• Clarified 150,000 ft-lb threshold for piping engineering note generation.
• Added an exclusion for piping attached to a single gas bottle. • Added guidance with respect to independent review.
• Added WPS and inspection guidance in 7.0 items 6 and 7. • In-process examination form added as a technical appendix. Terry Tope
Updated Teamcenter posting procedure.
Terry Tope
Required posting of engineering note to Teamcenter. Explicitly noted that amendments require Division/Section/Center approval. Provided additional guidance with respect to used piping systems. Thomas Page
Revised wording in Section 5.0, Item 8 to clarify the review of Amendments. Added wording in Section 7.0, Items 7, 8 and 9. Thomas Page
Applied new FESHM template. Revised wording in Section 7, Item 2. Added Non-flammable Scintillator to Table 1.