ML24206A078
| ML24206A078 | |
| Person / Time | |
|---|---|
| Site: | 99902039 |
| Issue date: | 07/31/2024 |
| From: | James Smith Licensing Processes Branch |
| To: | Gerond George Licensing Processes Branch |
| References | |
| EPID L-2023-TOP-0036 | |
| Download: ML24206A078 (1) | |
Text
OFFICIAL USE ONLY - PROPRIETARY INFORMATION OFFICIAL USE ONLY - PROPRIETARY INFORMATION July 31, 2024 MEMORANDUM TO:
Gerond A. George, Chief Licensing Projects Branch Division of Operating Reactor Licenses Office of Nuclear Reactor Regulation FROM:
Jeffery D. Smith, Project Manager /RA/
Licensing Projects Branch Division of Operating Reactor Licenses Office of Nuclear Reactor Regulation
SUBJECT:
U.S. NUCLEAR REGULATORY COMMISSION
SUMMARY
OF THE MAY 29, 2024, OBSERVATION PUBLIC MEETING TO DISCUSS MITSUBISHI ELECTRIC COMPANYS RESPONSES TO THE REQUEST FOR ADDITIONAL INFORMATION QUESTIONS AND SUPPLEMENT RESPONSE (EPID: L-2023-TOP-0036)
The U.S. Nuclear Regulatory Commission (NRC) conducted a virtual observation public meeting/teleconference on May 29, 2024. The purpose of this meeting was for the NRC to ask questions to clarify the responses received from Mitsubishi Electric Company (MELCO) on the request for additional information (RAI) questions and supplements.
The public meeting notice was posted on the NRC public website on May 13, 2024, and can be found under Agencywide Documents Access and Management System (ADAMS) Accession No. ML24134A130. MELCOs presentation materials for this public meeting can be found under Accession No. ML24157A385 (Non-proprietary). Persons who do not have access to ADAMS or who encounter problems in accessing the meeting materials located in ADAMS should contact the NRC Public Document Room reference staff by telephone at 1-800-397-4209 or by email to pdr.resource@nrc.gov. The enclosure to this memorandum provides a list of the meeting participants.
During the open portion of the meeting, MELCO staff presented their plans to modify the RAI responses and supplement submissions to address the NRC staff questions. No regulatory decisions or commitments were made during the meeting.
CONTACT:
Jeffery Smith, NRR/DORL 301-415-4116 NOTICE: Enclosure 2 to this transmittal letter has proprietary information, once this letter is separated from Enclosure 2 it is decontrolled.
OFFICIAL USE ONLY - PROPRIETARY INFORMATION OFFICIAL USE ONLY - PROPRIETARY INFORMATION In response to the NRCs first RAI response question regarding incorporating Attachments 1-1 and 2-1 in the RAI 1 response, MELCO staff stated that the modules listed in the attachments will be updated in the applicable sections and the new Appendix F. The NRC staff asked questions about maintaining the consistency of the information between the new Appendix F and the existing Appendix A. The MELCO staff responded with acknowledging the NRC staffs concerns regarding referencing the modules in Appendix F.
In response to the NRCs second RAI response question regarding the changes to critical modules and the impact of those changes to the context in the revised Mitsubishi Electric Total Advanced Control (MELTAC) TR, the MELCO staff stated the watchdog timer will be improved and that the other updates described in the RAI response are not significant and have no impact on any context. The NRC staff expressed the importance of explicitly stating the significance determination of those changes in the TR. The NRC staff also asked about the ability to incorporate the analysis used to determine the significance of the changes to the modules.
In response to the NRCs third RAI response question regarding the referenced changes impact on the previous evaluation of the safety Visual Display Unit (VDU) performed by the NRC, the MELCO staff stated the changes to the safety VDU panel does not change specification or function of the VDU. The NRC attendees expressed the desire to have the changes and that statement expressed in one of the responses submitted to the NRC. The MELCO staff stated that the RAI response could be resubmitted with a statement to that effect.
In response to the NRCs fourth RAI response question regarding safety functionality verification after seismic testing in Section 5.7.1 included in the RAI 1 response, the MELCO staff stated they understood the concern and plan to detail the function testing in the updated environmental qualification (EQ) summary.
In response to the NRCs fifth RAI response question regarding the omission of Electric Power Research Institute (EPRI) TR-107330 for the EQ testing for updated and new modules, the MELCO staff stated they will apply the guidance in EPRI TR-107330 for the environmental qualification testing to the TR.
In response to the NRCs sixth RAI response question regarding hardware equivalency analysis in the new Section 5.6.2.1 for the module environmental test in the RAI 1 response, the MELCO staff stated the answer involved proprietary information and that it would be discussed in the closed portion of the meeting.
In response to the NRCs seventh RAI response question regarding cabinet environmental test information, the MELCO staff stated the cabinet is site-specific and MELCO would like to perform temperature and humidity test module by module in a test rack. The MELCO staff also described their intended wording update to Section 5.6.1 of the TR.
In response to the NRCs eighth RAI response question regarding a possible inconsistency between the RAI 6 and RAI 7 responses and some sections in ISG-04 Conformance Analysis, the MELCO staff showed their intent to revise ISG-04 Conformance Analysis (JEXU-1041-1015) to clarify specifications and stated that the specifics of the revisions are proprietary and will be discussed further in the closed portion of the meeting.
In response to the NRCs ninth RAI response question regarding a possible inconsistency between the RAI 7 response and Section 2.0 of ISG-04 Conformance Analysis, the MELCO
OFFICIAL USE ONLY - PROPRIETARY INFORMATION OFFICIAL USE ONLY - PROPRIETARY INFORMATION staff stated that the answer involved proprietary information and that it would be discussed in the closed portion of the meeting.
In response to the NRCs first supplement question regarding the timing of document submissions planned in Phase 2, the MELCO staff stated that the answer involved proprietary information and that it would be discussed in the closed portion of the meeting.
In response to the NRCs second supplement question regarding MELCOs intent to withdraw JEXU-1041-1015, MELTAC Platform ISG-04 Conformance Analysis, based on the supplement marking the document as deleted, the MELCO staff stated that the answer involved proprietary information and that it would be discussed in the closed portion of the meeting.
In response to the NRCs third supplement question regarding the review of Human Factors Considerations of IEEE Std. 7-4.3.2 regarding the NRC approved MELTAC TR Rev. 2, the MELCO staff stated their goal of demonstrating some conformance to Clause 5.14 at the platform level and asked about the need for Human Factors Branch review. The NRC staff responded with the possibility of either human factors review or treating it as an application specific item. The MELCO staff responded with their desire to withdraw and keep it an application specific item similar to the TR Rev. 2.
In response to the NRCs fourth supplement question regarding the title of IEEE Std. 7-4.3.2-2016 used in Section 1.0 of the new supplement, the MELCO staff stated that they will update JEXU-1041-1018 accordingly to correct the title.
In response to the NRCs fifth supplement question regarding the applicability of IEEE Std. 7-4.3.2, Clause 5.17, to the MELTAC platform, the MELCO staff stated the MELTAC platform does not contain any commercial grade items which are subject to requirements of Clause 5.17 in IEEE Std. 7-4.3.2 since none of the types of commercial grade items listed in JEXU-1041-1124 are digital equipment. The NRC staff understood the clarification and will rereview the section with the clarification in mind.
The NRC and MELCO staff discussed general schedule concerns and timeframes for resubmittal and review. Both NRC and MELCO staff expressed the need to evaluate anticipated timeframes based on the information shared during this meeting.
At the conclusion of the meeting, there was an opportunity for the public to provide comments and ask questions. One member of the public expressed gratitude for the ability to observe the RAI process.
Docket No. 99902039
Enclosures:
1: List of Meeting Attendees 2: Proprietary Discussion
OFFICIAL USE ONLY - PROPRIETARY INFORMATION OFFICIAL USE ONLY - PROPRIETARY INFORMATION U.S. NUCLEAR REGULATORY COMMISSION
SUMMARY
OF THE MAY 29, 2024, OBSERVATION PUBLIC MEETING TO DISCUSS MITSUBISHI ELECTRIC COMPANYS RESPONSES TO THE REQUEST FOR ADDITIONAL INFORMATION QUESTIONS AND SUPPLEMENT RESPONSE List of Meeting Attendees May 29, 2024 Name Organization Jeffery Smith U.S. Nuclear Regulatory Commission (NRC)
Lois James NRC Jack Zhao NRC Yaseen Sabil NRC Gerond George NRC Fanta Sacko NRC Ken-ichi Furuno Mitsubishi Electric Company (MELCO)
Keiichi Hirabayashi MELCO Tomonori Yamane MELCO Chad Modro Mitsubishi Electric Power Products, Incorporated (MEPPI)
Jim Dolfi MEPPI Ken Krayvo MEPPI Gil Remley Mitsubishi Consultant Bruce Geddes Mitsubishi Consultant Mary Miller Public
ML24212A320 (Package)
ML24206A078 (Summary)
ML24212A321 (Enclosure 2-Proprietary)
- via email NRR-106 OFFICE DORL/LLPB:PM DORL/LLPB:LA DORL/LLPB:BC NAME JSmith DHarrison GGeorge DATE 7/24/2024 7/30/24 7/31/2024 OFFICE DORL/LLPB:PM NAME JSmith DATE 7/31/2024