ML24215A025

LLC, Response to Sdaa Audit Question Number A-3.6.2-1

ML24215A025
Person / Time
Site:	05200050
Issue date:	08/02/2024
From:	NuScale
To:	Office of Nuclear Reactor Regulation
Shared Package
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References
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Download: ML24215A025 (1)

Text

Response to SDAA Audit Question Question Number: A-3.6.2-1 Receipt Date: 07/03/2023 Question:

Provide a discussion on the impact of DWO on main steam and feedwater system High Energy Line Break (HELB) as DWO is a Level-A/B event and the associated stresses and CUF need to be included per BTP3-4 for High energy Line Break postulation.

Response

Topical Report ((2(a),(c), ECI describes the evaluation model used to predict DWO onset in the NuScale Power Module (NPM-20) ((

}}2(a),(c), ECI As described in (( 
}}2(a),(c), ECI NuScale Nonproprietary NuScale Nonproprietary

Therefore, there are no DWO-related stresses to consider in the design of the MS system and FW system piping or in the determination of postulated pipe ruptures per BTP 3-4. No changes to the SDAA are necessary. NuScale Nonproprietary NuScale Nonproprietary}}