ML23019A050

NRR E-mail Capture - General Audit Questions for Hermes PSAR Chapter 2 (Site Characteristics)

ML23019A050
Person / Time
Site:	Hermes File:Kairos Power icon.png
Issue date:	01/13/2023
From:	Edward Helvenston NRC/NRR/DANU
To:	Bryan M, Gardner D, Peebles D Kairos Power
References
Download: ML23019A050 (3)

Text

From: Edward Helvenston Sent: Friday, January 13, 2023 4:26 PM To: Drew Peebles; Darrell Gardner; Martin Bryan Cc: Benjamin Beasley; Samuel Cuadrado de Jesus; Matthew Hiser; Amitava Ghosh; Jason White

Subject:

General Audit questions for Hermes PSAR Chapter 2 Hello Darrell, Drew, Marty, Please see below for a list of questions the NRC staff has prepared for Kairos related to the Hermes PSAR, specifically, Chapter 2 (Site Characteristics). The NRC staff would like to discuss these within the scope of the General Audit (see audit plan dated 2/10/2022, ADAMS Accession No. ML22039A336), and I am providing these in advance to facilitate discussion during an audit meeting. Once Kairos is ready to discuss, please let us know and we can set up a meeting. We will add this e-mail with questions to public ADAMS. If any questions, please let Ben, Sam, Matt, or I know.

Thanks, Ed 2.2-6 PSAR Section 2.2.3 references NRC Regulatory Guide (RG) 1.91, Revision 1, Evaluations of Explosions Postulated to Occur on Transportation Routes Near Nuclear Power Plants, dated 1978. However, the staff notes that RG 1.91 was updated as Revision 2, Evaluations of Explosions Postulated to Occur at Nearby Facilities and on Transportation Routes Near Nuclear Power Plants (note different title) in 2013. (RG 1.91 was updated again as Revision 3 in November 2021.) Based on how RG 1.91 methodologies are discussed in the PSAR, it is not clear to the staff whether Kairos intended to reference Revision 1, or a later version.

2.2-7 PSAR Section 2.2.3 references NRC RG 1.78, Evaluating the Habitability of a Nuclear Power Plant Control Room During a Postulated Hazardous Chemical Release. However, the PSAR does not provide a version and it is not clear to the staff which version of this RG Kairos intended to reference.

2.2-8 PSAR Section 2.2.3 references NRC RG 4.7, General Site Suitability Criteria for Nuclear Power Stations. However, the PSAR does not provide a version and it is not clear to the staff which version of this RG Kairos intended to reference.

2.2-9 PSAR Section 2.2, Reference 18, is SHINE Medical Technologies, LLC, SHINE Medical Isotope Production Facility Preliminary Safety Analysis Report. June 2019. However, the staff notes that the final (NRC-approved) revision of the SHINE PSAR is dated October 2015 (ADAMS Accession No. ML15258A431). Please clarify which revision of the SHINE safety analysis report Kairos intended to reference.

2.3-1 PSAR Section 2.3.1.10 states that Based on the data provided in American Society of Civil Engineers (ASCE) Standard No. 7-10 [], Figure 10.4-2, the specification for calculating the ice load on a structural element is: the 500-year mean recurrence interval of uniform ice thickness due to freezing rain for Roane County is 1 inch with a concurrent 3-second wind gust of 30 mph. However, based on its review of ASCE Standard No. 7-10, the staff notes that the standard does not appear to include a Figure 10.4-2. It is not clear to the staff if Kairos intended instead to reference Figure 10-2 of the ASCE standard, and refer to a 50-

year mean recurrence interval.

Ed Helvenston, U.S. NRC Non-Power Production and Utilization Facility Licensing Branch (UNPL)

Division of Advanced Reactors and Non-Power Production and Utilization Facilities (DANU)

Office of Nuclear Reactor Regulation (NRR)

O-6B22 (301) 415-4067

Hearing Identifier: NRR_DRMA Email Number: 1917 Mail Envelope Properties (BY5PR09MB595674E57BE3AE7DFE2ADAF1E0C29)

Subject:

General Audit questions for Hermes PSAR Chapter 2 Sent Date: 1/13/2023 4:26:04 PM Received Date: 1/13/2023 4:26:00 PM From: Edward Helvenston Created By: Edward.Helvenston@nrc.gov Recipients:

"Benjamin Beasley" <Benjamin.Beasley@nrc.gov>

Tracking Status: None "Samuel Cuadrado de Jesus" <Samuel.CuadradoDeJesus@nrc.gov>

Tracking Status: None "Matthew Hiser" <Matthew.Hiser@nrc.gov>

Tracking Status: None "Amitava Ghosh" <Amitava.Ghosh@nrc.gov>

Tracking Status: None "Jason White" <Jason.White@nrc.gov>

Tracking Status: None "Drew Peebles" <peebles@kairospower.com>

Tracking Status: None "Darrell Gardner" <gardner@kairospower.com>

Tracking Status: None "Martin Bryan" <bryan@kairospower.com>

Tracking Status: None Post Office: BY5PR09MB5956.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 3175 1/13/2023 4:26:00 PM Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: