ML23205A223

Response to Sdaa Audit Question A-9.5.1.2.4-1

ML23205A223
Person / Time
Site:	99902078, 05200050
Issue date:	07/24/2023
From:	NuScale
To:	Office of Nuclear Reactor Regulation
Shared Package
ML23205A216	List: ML23205A217 ML23205A218 ML23205A219 ML23205A220 ML23205A222 ML23205A223 ML23205A224 ML23205A225 ML23205A226 ML23205A227 ML23205A228 ML23205A230 ML23205A231 ML23205A232 ML23205A233
References
LO-146777
Download: ML23205A223 (1)

Text

NuScale Nonproprietary Response to SDAA Audit Question Question Number: A-9.5.1.2.4-1 Receipt Date: 04/10/2023 Question:

Section 9.5.1.2.4 states: Electrical conductors within the containment vessel are noncombustible or routed in conduit, and result in no intervening combustible loading for an exposure fire impacting other cable or components in the containment. Confirm whether all cables inside containment will be routed in conduit or be of noncombustible construction as well as being IEEE 383/1202 qualified cables.

Response

Combustible cables if used in containment will be routed in conduit and be IEEE 383/1202 qualified in accordance with the RG 1.189 position 4.1.3.1.

Cables in containment that are categorized as noncombustible will not be qualified per IEEE 383/1202. However, these cables will intrinsically meet the flame-propagation performance criteria of IEEE 383/1202 due to the cables noncombustible design attributes.

No changes to the SDAA are necessary.

NuScale Nonproprietary