ML23180A145
| ML23180A145 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 07/13/2023 |
| From: | Amy Snyder Reactor Decommissioning Branch |
| To: | Shaun Anderson Reactor Decommissioning Branch |
| References | |
| Download: ML23180A145 (1) | |
Text
LICENSEE:
ZIONSOLUTIONS, LLC FACILITY:
ZION NUCLEAR POWER STATION, UNITS 1 AND 2
SUBJECT:
SUMMARY
OF CLARIFICATION MEETING WITH ZIONSOLUTIONS, LLC REGARDING 2023 CONFIRMATORY SURVEYS FOR THE ZION NUCLEAR POWER STATION, UNITS 1 AND 2 TO:
Shaun Anderson, Chief, Reactor Decommissioning The U.S. Nuclear Regulatory Commission (NRC) held a clarification meeting with ZionSolutions LLC (ZS), the licensee for the Zion Nuclear Power Station, Units 1 and 2 (ZNPS), on June 13, 2023. The purpose of the meeting was to discuss the confirmatory survey criteria for surface and subsurface discrete radioactive particles (DRP) and radionuclides of concern provided to ZS on June 9.
The meeting began with introductions of the attendees followed by opening remarks. A list of attendees is provided in the attachment. Highlights of the meeting are summarized below. The NRC stated that they are planning to conduct the surface confirmatory survey the week of June 26, 2023, and the subsurface confirmatory survey the week of July 10, 2023.
At this meeting, the NRC staff provided ZS an opportunity to identify any concerns, any unintended potential consequences, or information that NRC staff might have overlooked about implementation. ZS said overall that the criteria seem fair, but had three questions, one related to the 10 DRP criteria and two related to dose assessment.
ZS wanted to know the technical and risk-informed basis for the threshold of 10 DRPs. NRC explained that the NRC staff determined based on the Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) (ML003761445), that a minimum of 10 would be statistically significant to make a decision regarding reasonable assurance.
ZS asked the NRC to explain how the NRC intends to use the new ORISE Dose Coefficient in Estimating Scan Minimum Detectable Activities of Discrete Radioactive Particles Technical Report, dated October 31, 2022 (ML22304A137). NRC staff explained that it would use ten percent of the dose coefficient values, similar to what ZS specified in its DRP Survey Report (TSD 22-001, "Discrete Radioactive Particle Survey Report" (ML22279A992) which was provided in ZS revise response (ML22089A098) to request for additional information (RAI) (RAI-10)
(ML21238A067) as part of the partial site release request (ML20164A096) review regarding use of dose coefficients.
ZS stated that given the amount of survey scanning by ZS in the past and the amount planned by NRC and given the fact that NRC will be removing any DRPs found, ZS requested clarification regarding what it would need to remediate if NRC determined that remediation was necessary. The NRC staff explained that it would depend on the results and whether the NRC staff could make a reasonable assurance determination regarding meeting the release criteria. The NRC staff will consider the scanning and the fact the DRPs would be identified and removed.
July 13, 2023
2 ZS asked NRC to explain what type of dose assessment NRC plans to perform. The NRC staff explained that they would evaluate the potential dose from each DRP, if any are found. NRC would evaluate the potential dose of the DRP if it were not removed and evaluate the Minimum Detectable Activity dose to determine the dose for DRPs that might be present but could not be detected. These actions would help NRC staff in determining whether the less likely but plausible potential dose scenario analysis would apply to help riskinform decision-making as discussed in more detail in NUREG-1757, Volume 2, Rev. 2, Chapter 5 (ML21299A031).
During the latter half of the meeting, survey logistics were discussed with Oak Ridge Institute for Science and Education (ORISE), NRC independent contractor that will perform the confirmatory surveys, on the call. The NRC and ZS agreed to continue discussions regarding ensure logistics (instrument shipping, storage, workspace, training, etc.) needs would be met upon arrival on site.
The staff agreed to finalize the confirmatory survey criteria, without modification.
Please direct any inquiries to me at (301) 415-6822 or Amy.Snyder@nrc.gov.
Sincerely, Amy M. Snyder, Senior Project Manager Reactor Decommissioning Branch Division of Decommissioning, Uranium Recovery, and Waste Programs Office of Nuclear Material Safety and Safeguards
Enclosure:
Attendee list Docket Nos.: 50-295, 50-304 License Nos.: DPR-39, DPR-4 Signed by Snyder, Amy on 07/13/23
- via email OFFICE NMSS/DUWP/RDB NMSS/DUWP/RDB NMSS/DUWP/RTAB NMSS/DUWP/RDB*
NAME ASnyder SAnderson McKenney ASnyder DATE 06/29/23 07/05/23 07/13/23 07/13/23
SUMMARY
OF CLARIFICATION MEETING WITH ZIONSOLUTIONS, LLC REGARDING 2023 CONFIRMATORY SURVEYS FOR THE ZION NUCLEAR POWER STATION, UNITS 1 AND 2 DATED JULY 13, 2023 ATTENDEES NRC and Contractor Chris McKenney, NMSS Karen Pinkston, NMSS Greg Chapman, NMSS Louis Caponi, NMSS Amy Snyder, NMSS Erika Bailey, Erika.Bailey@orau.org Licensee and Contractor Amy C. Hazelhoff, achazelhoff@energysolutions.com Justin Wheat, jtwheat@energysolutions.com Robert F. Yetter, RFYETTER@energysolutions.com Robert F. Yetter III, rfyetterIII@energysolutions.com Tom Fay, tfay-ext@energysolutions.com Tom Magette, Tom.magette@gmail.com Enclosure