ML22049B556

Kairos Power LLC, Transmittal of CPA Changes

ML22049B556
Person / Time
Site:	Hermes File:Kairos Power icon.png
Issue date:	02/18/2022
From:	Hastings P Kairos Power
To:	Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML22049B555	List: ML22049B556 ML22049B557 ML22049B558 ML22049B559
References
KP-NRC-2202-002
Download: ML22049B556 (5)

Text

KP-NRC-2202-002

February 18, 2022 Docket No. 50- 7513

US Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

Subject:

Kairos Power LLC Transmittal of Kairos Power CPA Changes

References:

1. Letter, Kairos Power LLC to Document Control Desk, Submittal of the Preliminary Safety Analysis Report for the Kairos Power Fluoride Salt-Cooled, High Temperature Non-Power Reactor (Hermes), Septe mber 29, 2021 (ML21272A376)

2. Letter, Kairos Power LLC to Document Control Desk, Submittal of the Environmental Report for the Kairos Power Fluoride Salt-Cooled, High Temperature Non-Power Reactor (Hermes), October 31, 2021 (ML21306A13 1)

3. Kairos Power LLC to Document Control Desk, Metallic Materials Qualification for the Kairos Power Fluoride Salt-Cooled High Temperature Reactor, KP -TR-013, Revision 0, June 30, 2020 (ML20182A800)

4. Kairos Power LLC to Document Control Desk, Graphite Material Qualification for the Kairos Power Fluoride Salt-Cooled High-Temperature Reactor, KP -TR-014, Revision 1, July 8, 2021 (ML21190A220)

In September and October 2021, Kairos Power submitted a Construction Permit Application (CPA) for the Hermes non-power reactor, including a Preliminary Safety Analysis Report (PSAR) (Reference 1) and an Environmental Report (ER) (Reference 2). Subsequent to the submittal of these documents, Kairos Power made a decision to eliminate the intermediate nitrate salt coolant loop and remove pr imary system heat directly through an air h eat rejection subsystem. This change has a negligible impact on the conclusions of the CPA but has a minor effect on content in several c hapters of the PSAR, the ER, and the Postulated Event Analysis Methodology Technical Report (KP-TR-018, which was also submitted in Reference 1).

Changes to the pages of the PSAR, ER, and Technical Report affected by this decision are provided in Enclosures 1, 2, and 3, respectively. A small number of minor changes unrelated to the revised heat removal strategy are also included in these enclosures. Kairos Power requests NRC review of these changes as part of continued review of the Hermes CPA.

This change also impacts two topical reports referenced in the CPA that are currently under review by NRC staff, KP-TR-013 (Reference 3) and KP-TR-014 (Reference 4). Kairos Power will provide updates to these reports as part of changes to these documents that are occurring as part of the review process.

Kairos Power LLC www.kairospower.com 707 W Tower Ave, Suite A 5201 Hawking Dr SE, Unit A 2115 Rexford Rd, Suite 325 Alameda, CA 94501 Albuquerque, NM 87106 Charlotte, NC 28211

KP-NRC-2202-004 Page 2

If you have any questions or need any additional information, please contact Drew Peebles at peebles@kairospower.com or at (704) 275-5388 or Darrell Gardner at gardner@kairospower.com or (704) 769-1226.

I declare under penalty of perjury that the foregoing is true and correct.

Executed on February 18, 2022

Peter Hastings, PE Vice President, Regulatory Affairs and Quality

Enclosures:

1) Changes to the PSAR

2) Changes to the ER

3) Changes to the Postulated Event Technical Report

xc (w/enclosure):

William Kennedy, Acting Chief, NRR, Advanced Reactor Licensing Branch Benjamin Beasley, Project Manager, NRR, Advanced Reactor Licensing Branch Edward Helvenston, Project Manager, NRR Advanced Reactor Licensing Branch Samuel de Jesus Cuadrado, Project Manager, NRR Advanced Reactor Licensing Branch Tamsen Dozier, Environmental Project Manager, NMSS, Environmental Review Branch Peyton Doub, Environmental Project Manager, NMSS, Environmental Review Branch Enclosure 1 Changes to the PSAR

(Non-Proprietary)

Enclosure 2 Changes to the ER

(Non-Proprietary)

Enclosure 3 Changes to the Postulated Event Technical Report

(Non-Proprietary)