ML24348A010
| ML24348A010 | |
| Person / Time | |
|---|---|
| Site: | 05200050 |
| Issue date: | 12/13/2024 |
| From: | NuScale |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML24348A006 | List:
|
| References | |
| LO-176318 | |
| Download: ML24348A010 (1) | |
Text
Response to NuScale Topical Report Audit Question Question Number: A-NonLOCA.LTR-2 Receipt Date: 03/27/2023 Question:
The non-LOCA LTR is missing sufficient detail regarding the CFD simulations performed for primary side heat transfer in Section 5.3.6. Examples of information that will be needed for the review include boundary conditions, mesh sensitivity and parameters, initial conditions, and all other physical models used as inputs aside from the heat transfer models that are provided.
Response
The requested detailed information regarding the CFD simulations performed for Section 5.3.6 is found in the supporting calculation EC-109948, Revision 0. The calculation EC-109948 has been provided for review in the Electronic Reading Room.
Section 5.3.6 of the topical report is revised to include additional information summarized from EC-109948.
Markups of the affected changes, as described in the response, are provided below:
NuScale Nonproprietary NuScale Nonproprietary
Non-Loss-of-Coolant Accident Analysis Methodology TR-0516-49416-NP Draft Revision 5
© Copyright 2024 by NuScale Power, LLC 350 5.3.6 Heat Transfer Correlation Comparison 5.3.6.1
Background
((2(a),(c) 5.3.6.2 Computational Fluid Dynamics Calculations (( A-NonLOCA.LTR-2 A-NonLOCA.LTR-2 }}2(a),(c),ECI A-NonLOCA.LTR-2 5.3.6.2.1 Model 1 Analysis and Results A-NonLOCA.LTR-2 (( }}2(a),(c),ECI
Non-Loss-of-Coolant Accident Analysis Methodology TR-0516-49416-NP Draft Revision 5 © Copyright 2024 by NuScale Power, LLC 351 (( A-NonLOCA.LTR-2 A-NonLOCA.LTR-2 A-NonLOCA.LTR-2 A-NonLOCA.LTR-2 }}2(a),(c),ECI A-NonLOCA.LTR-2
Non-Loss-of-Coolant Accident Analysis Methodology TR-0516-49416-NP Draft Revision 5 © Copyright 2024 by NuScale Power, LLC 352 (( A-NonLOCA.LTR-2
}}2(a),(c),ECI A-NonLOCA.LTR-2 Table 5-16 Comparison of correlation to CFD results - CFD model 1
(( }}2(a),(c),ECI
Non-Loss-of-Coolant Accident Analysis Methodology TR-0516-49416-NP Draft Revision 5 © Copyright 2024 by NuScale Power, LLC 353 A-NonLOCA.LTR-2 5.3.6.2.2 Model 2 Analysis and Results A-NonLOCA.LTR-2 (( A-NonLOCA.LTR-2 A-NonLOCA.LTR-2
}}2(a),(c),ECI Table 5-16 Comparison of correlation to CFD results - CFD model 1 (Continued)
(( }}2(a),(c),ECI
Non-Loss-of-Coolant Accident Analysis Methodology TR-0516-49416-NP Draft Revision 5 © Copyright 2024 by NuScale Power, LLC 354 (( A-NonLOCA.LTR-2 A-NonLOCA.LTR-2
}}2(a),(c),ECI A-NonLOCA.LTR-2 A-NonLOCA.LTR-2 5.3.6.2.3 Model 3 Analysis and Results A-NonLOCA.LTR-2
(( A-NonLOCA.LTR-2
}}2(a),(c),ECI Table 5-17 Comparison of correlation to CFD results - CFD model 2
(( }}2(a),(c),ECI
Non-Loss-of-Coolant Accident Analysis Methodology TR-0516-49416-NP Draft Revision 5 © Copyright 2024 by NuScale Power, LLC 355 (( A-NonLOCA.LTR-2 A-NonLOCA.LTR-2 A-NonLOCA.LTR-2 }}2(a),(c),ECI
Non-Loss-of-Coolant Accident Analysis Methodology TR-0516-49416-NP Draft Revision 5 © Copyright 2024 by NuScale Power, LLC 356 A-NonLOCA.LTR-2 A-NonLOCA.LTR-2 (( }}2(a),(c) A-NonLOCA.LTR-2 5.3.6.2.4 Computational Fluid Dynamics Conclusions A-NonLOCA.LTR-2 (( }}2(a),(c),ECI 5.3.6.3 Comparison of Heat Transfer Correlations within NRELAP5 (( }}2(a),(c) Table 5-18 Comparison of correlation to CFD results - CFD model 2 (( }}2(a),(c)}}