ML24215A064

LLC, Response to Sdaa Audit Question Number A-3.9.2-25

ML24215A064
Person / Time
Site:	05200050
Issue date:	08/02/2024
From:	NuScale
To:	Office of Nuclear Reactor Regulation
Shared Package
ML24215A000	List: ML24215A002 ML24215A003 ML24215A004 ML24215A005 ML24215A006 ML24215A007 ML24215A009 ML24215A010 ML24215A012 ML24215A013 ML24215A014 ML24215A015 ML24215A016 ML24215A017 ML24215A020 ML24215A021 ML24215A022 ML24215A023 ML24215A025 ML24215A027 ML24215A028 ML24215A030 ML24215A034 ML24215A036 ML24215A037 ML24215A038 ML24215A040 ML24215A042 ML24215A044 ML24215A045 ML24215A047 ML24215A050 ML24215A052 ML24215A054 ML24215A055 ML24215A057 ML24215A060 ML24215A062 ML24215A064 ML24215A066 ML24215A067 ML24215A069 ML24215A070 ML24215A072 ML24215A073 ML24215A074 ML24215A075 ML24215A076 ML24215A078 ML24215A079 ... further results
References
LO-169995
Download: ML24215A064 (1)

Text

Response to SDAA Audit Question Question Number: A-3.9.2-25 Receipt Date: 10/16/2023 Question:

"NuScale provided report (( 2(a),(c),ECI which includes updated plots of (( }} 2(a),(c),ECI Provide the accompanying (( }} 2(a),(c),ECI 2. Figure (( }} 2(a),(c),ECI NuScale is asked to respond to the following questions: What test conditions do these correspond to? What is causing the additional strain? What is the relative phasing between different strain gages at the same tube locations (relative phasing can differentiate between uniform expansion and bending). What estimated stresses correspond to these strains?"

Response

Item 1: The accompanying plot for (( }}2(a),(c),ECI is shown in Figure 1. NuScale Nonproprietary NuScale Nonproprietary

Figure 1: (( }}2(a),(c),ECI Item 2: Figure ((

}}2(a),(c),ECI NuScale Nonproprietary NuScale Nonproprietary

(( }}2(a),(c),ECI Figure 2: (( }}2(a),(c),ECI NuScale Nonproprietary NuScale Nonproprietary

Figure 3: (( }}2(a),(c),ECI As discussed above, within the limitations of the test facility, unconstrained thermal expansion explains the trends in the data. Unconstrained thermal expansion elongates the tubes but does not cause stress cycles. No changes to the SDAA are necessary. NuScale Nonproprietary NuScale Nonproprietary}}