ML24215A116

LLC, Response to Sdaa Audit Question Number A-5.4-8

ML24215A116
Person / Time
Site:	05200050
Issue date:	08/02/2024
From:	NuScale
To:	Office of Nuclear Reactor Regulation
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Download: ML24215A116 (1)

Text

Response to SDAA Audit Question Question Number: A-5.4-8 Receipt Date: 11/20/2023 Question:

Revision 1 of SDAA Part 2, Chapter 5 (ML23304A338) add the flow restrictor flanged sleeve and collet to SDAA Table 5.4-3. Please discuss why the mandrel with orifice was not added to SDAA Table 5.4-3 in Revision 1.

Response

The attached markup to Table 5.4-3 of the Standard Design Approval Application (SDAA),

Revision 1, includes the mandrel with orifice.

Markups of the affected changes, as described in the response, are provided below:

NuScale Nonproprietary NuScale Nonproprietary

NuScale Final Safety Analysis Report Reactor Coolant System Component and Subsystem Design NuScale US460 SDAA 5.4-38 Draft Revision 2 Audit Question A-5.4-8 Table 5.4-3: Steam Generator System Component Materials Component Specification Alloy Designation (Grade, Class, or Type)

SGS Piping

• SGS Feedwater Piping Assembly

• SGS Main Steam Piping Assembly Pipe SA-312 TP304 SMLS, TP316 SMLS1 Pipe Fittings SA-182 F304, F316 1 SA-403 WP304 SMLS, WP316 SMLS 1 Pressure-Retaining Bolting SB-637 UNS N077182 Piping Supports Supports SA-240 Type 304, Type 3161 Type 405, Type 410S SA-479 Type 304, Type 3161 Type 405, Type 410 Annealed or Class 1 SA-312 TP304, TP304L, TP316, TP316L1 Bolting SA-193 Grade B8, Grade B8M SA-194 Grade 8, Grade 8M SA-564 Type 630 H1100 SG Supports SG Supports, SG Tube Supports SG Backing Strips SA-240 Type 304 Weld Filler Metals for Piping, Piping Supports, and SG Supports 3XX Austenitic Stainless Steel Weld Filler Metals SFA-5.4 E308, E308L, E316, E316L3 SFA-5.9 ER308, ER308L, ER316, ER316L3 SFA-5.22 E308, E308L, E309, E309L, E316, E316L 3,4 SFA-5.30 IN308, IN308L, IN316, IN316L3 Nickel-Base Alloy Weld Filler Metals SFA-5.11 ENiCrFe-7 SFA-5.14 ERNiCrFe-7, ERNiCrFe-7A, EQNiCrFe-7, EQNiCrFe-7A Inlet Flow Restrictor Components Mandrel with Orifice SA-479 Type 316 Flow Restrictor Flanged Sleeve SA-479 Type 304 Flow Rrestrictor Hardware SA-479 Type 316 Flow Restrictor Collet SA-479 Type 304 Flow Rrestrictor Llocking Pplate SA-240 Type 304 Other SG Components SG Tubes Steam Plenum Access Port Steam Plenum Access Port Covers Steam Plenum Caps Feed Plenum Access Port Feed Plenum Access Port Covers Table 5.2-3 Notes:

(1) 0.03% maximum carbon if unstabilized Type 3XX base metals are welded or exposed to temperature range of 800°F to 1500°F subsequent to final solution anneal.

(2) SB-637 UNS N07718 solution treatment temperature range before precipitation hardening treatment restricted to 1800°F to 1850°F.

(3) 0.03% maximum carbon for unstabilized AISI Type 3XX weld filler metals; ferrite number in the range of 5FN to 20FN, except 5FN to 16FN for Type 316 and Type 316L.

(4) Applicable to SG support components only.