ML20174A402

Attachment 3 - 4.II.4.8 Low Speed Wind

ML20174A402
Person / Time
Site:	Holtec
Issue date:	06/22/2020
From:	Holtec
To:	Office of Nuclear Material Safety and Safeguards
Shared Package
ML20174A397	List: ML20174A398 ML20174A400 ML20174A402 ML20174A404
References
5014902
Download: ML20174A402 (2)

Text

5014902 Attachment 3 4.II.4.8 Low Speed Wind Per NUREG-2174, low speed wind can affect the thermal performance of ventilated storage systems. A sensitivity study is performed herein to demonstrate safety of the HI-STORM 100 Version E system under such environmental conditions. The thermal model in Section 4.II.4.1 is modified appropriately (details documented in [4.II.7]) and evaluated for wind speeds ranging from 0 to 15 mph. It is concluded that low speed winds have a marginal impact on the peak cladding temperature, HI-STORM/MPC component temperatures and MPC cavity pressure under long term storage. The computed temperatures and pressures are in compliance with the acceptance criteria outlined in Section 4.II.3.7. The computed PCT and the MPC cavity pressures under low speed wind are presented in Table 4.II.4.8.

HOLTEC INTERNATIONAL COPYRIGHTED MATERIAL HI-STORM 100 FSAR Proposed Rev. 17C REPORT HI-2002444 4-II-19

5014902 Attachment 3 Table 4.II.4.8 Peak Cladding Temperatures and MPC-32M Pressures under Low Speed Wind Peak Cladding Wind Speed, MPC Cavity Pressure, Temperature mph o psig F

No Wind 705 97.5 2 707 97.5 5 707 97.7 7 711 98.0 10 707 97.5 15 705 97.4 HOLTEC INTERNATIONAL COPYRIGHTED MATERIAL HI-STORM 100 FSAR Proposed Rev. 17C REPORT HI-2002444 4-II-26