ML24215A064
| ML24215A064 | |
| Person / Time | |
|---|---|
| Site: | 05200050 |
| Issue date: | 08/02/2024 |
| From: | NuScale |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML24215A000 | List:
|
| 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}}