ML20111A171
| ML20111A171 | |
| Person / Time | |
|---|---|
| Issue date: | 04/28/2020 |
| From: | Rivera R NRC/NRR/DANU/UARL |
| To: | Benjamin Beasley NRC/NRR/DANU/UARL |
| Rivera R, NRR/DANU/UARL,415-7190 | |
| References | |
| Download: ML20111A171 (5) | |
Text
April 28, 2020 MEMORANDUM TO:
Benjamin Beasley, Chief Advanced Reactor Licensing Branch Division of Advanced Reactors and Non-Power Production and Utilization Facilities Office of Nuclear Reactor Regulation FROM:
Richard Rivera, Project Manager /RA/
Advanced Reactor Licensing Branch Division of Advanced Reactors and Non-Power Production and Utilization Facilities Office of Nuclear Reactor Regulation
SUBJECT:
AUDIT PLAN FOR THE REGULATORY AUDIT OF KAIROS POWER LLC STRUCTURAL MATERIALS LICENSING TOPICAL REPORTS In October 2018 Kairos Power LLC (Kairos) began pre-application discussions with the U.S.
Nuclear Regulatory (NRC) staff on their Kairos Power Fluoride-Salt-Cooled, High-Temperature Reactor (KP-FHR). Over the past 16 months, Kairos has submitted several topical and technical reports and has met with the NRC staff on numerous occasions. During these meetings, Kairos informed the NRC of their plans to submit topical reports in the areas of structural material licensing, both metallic and nonmetallic materials. Additionally, Kairos discussed the phenomena identification, and ranking tables (PIRTs), which were developed in support of these topical reports. The purpose of this audit is to provide a preliminary review of the PIRT performed by Kairos, and provide feedback on the proposed topical reports to support an efficient review.
The audit will take place via the use of electronic reading rooms and teleconference meetings.
The audit will be held from April 21, 2020, through May 31, 2020. The contents of the audit plan are provided as an enclosure to this memorandum.
Enclosure:
Audit Plan CONTACT:
Richard Rivera, NRR/DANU/UARL 301-415-7190
- via email NRC-002 OFFICE NRR/DANU/UAR L/PM*
NRR/DANU/UA RL/PM*
NRR/DANU/UA R/LA*
NRR/DANU/U ART/BC*
NRR/DANU/UA RL/BC*
NRR/DANU/UARL
/PM*
NAME RRivera SMagruder SLent MHayes BBeasley RRivera DATE 4/20/2020 4/20/2020 4/20/2020 4/23/2020 4/24/2020 4/28/2020
Enclosure AUDIT PLAN FOR THE REGULATORY AUDIT OF KAIROS POWER LLC STRUCTURAL MATERIALS LICENSING TOPICAL REPORTS A.
Background and
Purpose:
In October 2018 Kairos Power LLC (Kairos) began pre-application discussions with the U.S.
Nuclear Regulatory Commission (NRC) staff on their Kairos Power Fluoride-Salt-Cooled, High-Temperature Reactor (KP-FHR). Over the past 16 months, Kairos has submitted several topical and technical reports and has met with the NRC staff on numerous occasions. During these meetings, Kairos informed the NRC of their plans to submit topical reports in the areas of structural material licensing, for both metallic and nonmetallic materials. Additionally, Kairos discussed the phenomena identification, and ranking tables (PIRTs) which were developed in support of these topical reports. The purpose of this audit is to provide a preliminary review of the PIRT performed by Kairos, and provide feedback on the proposed topical reports to support an efficient review.
B.
Regulatory Audit Basis All production and utilization facilities licensed under Title 10 of the Code of Federal Regulations (10 CFR) Part 50, including both LWRs and non-LWRs, are required to describe principle design criteria (PDC) in their preliminary safety analysis report supporting a construction permit application as described in 10 CFR 50.34(a)(3). Kairos proposed a set of PDCs in their topical report, Principal Design Criteria (PDC) for the Kairos Power Fluoride Salt-Cooled, High-Temperature Reactor. The staff has approved this topical report and finds that PDCs 1,14 and 31 serve as a basis for this audit. PDC 1 establishes that structures, systems, and components which are safety significant shall be designed, fabricated, erected, and tested to quality standards commensurate to the safety significance of the functions to be performed. The requirements in PDC 14 establish the criteria to ensure the low probability of abnormal leakage, failure, and rupture of the safety-significant elements of the reactor coolant boundary. Finally, PDC 31 requires that the safety-significant elements of the reactor coolant boundary be designed with sufficient margin to maintain a non-brittle behavior of materials, and minimize the probability of rapidly propagating fractures.
C.
Regulatory Audit Scope Staff expects discussions will center on the following areas:
Design overview of KP-FHR Purpose of the topical report, specific component application and its use in Structural materials selection Materials compatibility KP-FHR High-Temperature Structural Materials Phenomenological Identification and Ranking Tables (PIRT) overview Corrosion Environmentally assisted cracking Other phenomena (e.g. stress relaxation cracking, phase formation, thermal cycling/striping, etc.)
Irradiated materials Basis for using 316H alloy Proposed testing for each material issue Basis for testing D.
Information and Other Material Necessary for the Regulatory Audit The NRC staff expects that discussions will center on the areas identified above in the Regulatory Audit Scope section, and documents pertaining to these areas are to be made available to the NRC staff, as applicable based on the discussion.
Other documents will be requested based on the progress of the staffs review.
Appropriate handling and protection of proprietary information shall be acknowledged and observed throughout the audit.
E.
Audit Team The following are the NRC audit team members:
- 1. John Honcharik, Senior Materials Engineer (NRC)
- 2. Andrew Yeshnik, Materials Engineer (NRC)
- 3. Alexander Chereskin, Chemical Engineer (NRC)
- 4. David Rudland, Senior Level Advisor for Nuclear Plant Materials (NRC)
- 5. Allen Hiser, Senior Level Advisor License Renewal Aging Management (NRC)
- 6. Stewart Magruder, Senior Project Manager (NRC), Audit lead
- 7. Richard Rivera, Project Manager (NRC)
The following are the Kairos contacts:
- 1. Darrell Gardner, Director, License Application
- 2. John Price, Sr. Licensing Engineer
- 3. Gabriel Meric, Nuclear Materials Engineer
- 4. George Young, Fellow Materials Engineer
- 5. Micah Hacket, Director of Technology Development F.
Logistics The audit will take place via the use of electronic reading rooms and teleconference meetings.
The audit will be held from April 21, 2020, through May 31, 2020. The NRC staff will address in the audit report the technical areas identified in the Regulatory Audit Scope of this audit plan along with presenting the audit outcomes.
The audit will be conducted in support of the pre-application interactions with Kairos, with an entrance on April 21, 2020, and exit on May 31, 2020.
The NRC staff acknowledges the potential for the proprietary nature of some of the information requested. It will be handled appropriately throughout the audit. The NRC staff will take notes that will be marked as proprietary and will not remove hard copies or copy electronic files.
G.
Special Requests If necessary, any circumstances related to the performance of the audit will be communicated to the applicant.
H.
Deliverables At the completion of the audit, the NRC staff will prepare an audit report within 45 days that will be declared and entered as an official agency record in ADAMS. The audit outcome may be used to identify any additional information to be submitted for making regulatory decisions.