ML23229A541

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Enclosure 2 - TerraPower-NRC Feedback on Anascent Thermal Hydraulic Model White Paper (See Special Instructions Below) EPID No. L-2023-LRO-0015
ML23229A541
Person / Time
Site: 99902100
Issue date: 08/14/2023
From: Jessup W
NRC/NRR/DANU/UAL1
To:
TerraPower
References
EPID L-2023-LRO-0015
Download: ML23229A541 (1)


Text

OFFICIAL USE ONLY - PROPRIETARY INFORMATION Enclosure OFFICIAL USE ONLY - PROPRIETARY INFORMATION TERRAPOWER, LLC - U.S. NUCLEAR REGULATORY COMMISSION STAFF FEEDBACK AND OBSERVATIONS REGARDING NAT-3049, NASCENT THERMAL HYDRAULIC MODEL WHITE PAPER (EPID NO. L-2023-LRO-0015)

SPONSOR INFORMATION Sponsor:

TerraPower, LLC Sponsor Address:

15800 Northup Way Bellevue, WA 98008 Project No.:

99902100 DOCUMENT INFORMATION Submittal Date:

March 20, 2023 Submittal Agencywide Documents Access and Management System (ADAMS) Accession No.: ADAMS Accession Nos. ML23080A012 (package); ML23080A0013 (public);

ML23080A0014 (non-public)

Purpose of the White Paper: TerraPower, LLC (TerraPower) stated that the purpose of NAT3049, "Nascent Thermal Hydraulic Model White Paper, is to provide an overview and description of the Natrium Simplified Coolant Energy Transport (Nascent) model, which will be used to predict steady-state coolant temperatures within fuel assembly subchannels.

Requested Action: TerraPower requested the U.S. Nuclear Regulatory Commission (NRC) staffs feedback and observations on the information discussed in its white paper (WP).

TerraPower specifically asked for feedback regarding topics for which additional discussion or consideration may be beneficial.

FEEDBACK AND OBSERVATIONS The NRC staff has reviewed the TerraPower WP and provided feedback and observations, below. The NRC staff is making no regulatory findings on this WP and nothing herein should be interpreted as official agency positions. The NRC staff observations in this response are not intended as comprehensive feedback. Lack of comment or observations regarding a certain aspect of the WP should not be interpreted as the NRC staffs agreement with TerraPowers position.