ML21208A213
| ML21208A213 | |
| Person / Time | |
|---|---|
| Issue date: | 07/14/2021 |
| From: | Thomas Aird, Cynthia Barr, Mark Fuhrmann, Kenneth Hamburger, Sarah Tabatabai Office of Nuclear Material Safety and Safeguards, NRC/RES/DRA |
| To: | |
| Aird, Thomas - 301 415 2442 | |
| Shared Package | |
| ML21208A206 | List: |
| References | |
| Download: ML21208A213 (12) | |
Text
NRC Subsurface Surveys Workshop July 14 - Day 1 Supported by NRC Staff:
Tom Aird, Office of Nuclear Regulatory Research Mark Fuhrmann, Office of Nuclear Regulatory Research Sarah Tabatabai, Office of Nuclear Regulatory Research Ken Hamburger, Office of Nuclear Regulatory Research Cynthia Barr, Office of Nuclear Material Safety and Safeguards
Workshop Objective We want your ideas, perspectives, and experience with characterizing and surveying subsurface contamination Is this Subsurface MARSSIM? No
Todays Agenda, July 14 10:05 - 10:20 NRC Introduction Tom Aird, NRC 10:20 - 11:20 Overview of Guidance on Surveys for Subsurface Radiological Contaminants
+ Q&A Carl Gogolak, SC&A, Inc.
11:20 - 12:00 NEI Presentation + Q&A Bruce Montgomery, Nuclear Energy Institute (NEI) 12:00 - 13:00 1-hour break Discussion Topic: Geospatial and Statistical Methods 13:00 - 13:30 EPRI presentation: Experiences with Geospatial and Statistical Based Surveys of Subsurface Soil Richard Reid, Electric Power Research Institute (EPRI) 13:30 - 14:00 PNNL Presentation Pacific Northwest National Laboratory (PNNL) 14:00 - 14:10 10-minute break 14:10 - 15:50 Open Discussion on the evaluation of sites with geospatial and statistical methods:
-Applicability of MARSSIM statistical tests and other methods
-Treatment of uncertainty and data sufficiency.
-Methods to determine the sample density, spatial distributions, depths, and volume to achieve a level of confidence and limit decision errors 15:50 - 16:00 Daily Wrap-up
Tomorrows Agenda, July 15 10:00 - 10:30 EPA Presentation: MARSSIM Subsurface Background Industry Presentation: A Graded Approach to Subsurface Characterization and Remediation and Related Tools and Methods 10:30 - 11:15 Discussion Topic: Subsurface DCGLs Presentation(s):
Cynthia Barr, NRC/NMSS Charlie Yu, Argonne National Lab Open Discussion 11:15 - 12:30 Discussion Topic: Subsurface Hot Spots Presentation(s):
Cynthia Barr, NRC/NMSS Carl Gogolak, SC&A Open Discussion 12:30 - 13:30 1-hour break Discussion Topic: Surveys of subsurface, including surveys of excavations, backfill materials, suspect areas, and hard-to-access areas 13:30 - 15:00 Presentation(s):
Bruce Watson, NRC/NMSS Matthew Wright, California DPH Claude Wiblin, SC&A (10-minute talk)
Open Discussion 15:00 - 15:15 15-minute break 15:15 - 16:00 Open Discussion on subsurface survey topics including but not limited to:
-Dose calculations for backfill materials; DCGLs for contaminants in the subsurface
-Applicability of Scenario B for subsurface residual radioactivity
-Methods to survey large subsurface soil excavations
Attendance Snapshot Federal agencies registered:
Agreement States Also:
125+ total registrants 20+ registrants from commercial companies 4+ DOE National Laboratories 3+ international registrants
Helpful Background Info https://www.nrc.gov/pmns/mtg?do=details&Code=20210553 Public meeting website:
Workshop Motivation Workshop Objective: we want your ideas, perspectives, and experience with characterizing and surveying subsurface contamination Workshop Motivation?
- More sites are being rapidly decommissioned instead of entering SAFSTOR
- These sites are complex and expected to contain areas of residual radioactivity in subsurface soils
- These facilities will need to be surveyed and a determination made as to the need for subsurface remediation.
A simple illustration of the issue 8
15-centimeter depth subsurface (below 15 cm)
New NRC guidance may be needed to provide licensees with acceptable approaches to subsurface surveys...
MARSSIM MARSAME MARSSIM = Multi-Agency Radiation Survey and Site Investigation Manual MARSAME = Multi-Agency Radiation Survey and Assessment of Materials and Equipment Manual
NRC Office of Nuclear Material Safety and Safeguards (NMSS) has already reviewed and approved many decommissioning licensee applications Some of these applications had subsurface contamination What we propose did not exist then, so what did licensees and NMSS do instead?
Employed a case-by-case approach very fact specific This is not a new issue
NUREG/CR-7021 (January 2012)
- A Subsurface Decision Model for Supporting Environmental Compliance
- NUREG-1757, Volume 2, Revision 1
- Consolidated Decommissioning Guidance:
Characterization, Survey, and Determination of Radiological Criteria
- Volume 2, Revision 2 has been issued as a draft report for comment
- NUREG-1575, Revision 1
- Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)
Prior NRC guidance
NRC staff drafts guidance RES and NMSS staff write NUREGs, Regulatory Guides, or other guidance documents to support licensee subsurface surveys 4
NRC and Contractor develops technical basis NRC and SC&A Inc. develops technical basis document(s) with NRC staff and public input 3
Research project proposed and awarded Statement of work drafted by NRC staff for subsurface surveys research proposal 2
NRC Licensing Office Requests Assistance Guidance is needed to provide licensees with acceptable approaches to subsurface surveys 1
Guidance on Subsurface Contamination Surveys RESEARCH PROCESS
Thanks again for attending!
NRC Subsurface Surveys Workshop July 14 - DAY 1