ML23013A342

Attachment 4 - HI-STORM 100 Amendment 16 Certificate of Compliance Appendix B, Changed Pages (Non-Proprietary)

ML23013A342
Person / Time
Site:	Holtec
Issue date:	01/13/2023
From:	Holtec
To:	Office of Nuclear Material Safety and Safeguards
Shared Package
ML23013A337	List: ML23013A338 ML23013A340 ML23013A341 ML23013A342 ML23013A343 ML23013A344 ML23013A345 ML23013A346 ML23013A347
References
5014956, EPID L-2021-LLA-0039
Download: ML23013A342 (1)

Text

Design Features 3.0 DESIGN FEATURES (continued)

Certificate of Compliance No. 1014 Amendment No. 165 Appendix B 3-8 Table 3-1 (page 5 of 9)

LIST OF ASME CODE ALTERNATIVES FOR HI-STORM 100 CASK SYSTEM Component Reference ASME Code Section/Article Code Requirement Alternative, Justification & Compensatory Measures MPC Lid to Shell Weld NB-5230 Radiographic (RT) or ultrasonic (UT) examination required Only UT or multi-layer liquid penetrant (PT) examination is permitted. If PT alone is used, at a minimum, it will include the root and final weld layers and each approximately 3/8 inch of weld depth.

MPC Closure Ring, Vent and Drain Cover Plate Welds NB-5230 Radiographic (RT) or ultrasonic (UT) examination required Root (if more than one weld pass is required) and final liquid penetrant examination to be performed in accordance with NB-5245. The closure ring provides independent redundant closure for vent and drain cover plates. Vent and drain port cover plate welds are helium leakage tested. As an alternative, the helium leakage test does not have to be performed if the REDUNDANT PORT COVER DESIGN is used.

Holtec Letter 5014956 Attachment 4 1 of 1