ML22027A389
| ML22027A389 | |
| Person / Time | |
|---|---|
| Issue date: | 03/09/2022 |
| From: | Cynthia Barr NRC/NMSS/DDUWP/RTAB |
| To: | |
| Cynthia Barr, 301-415-4015 | |
| Shared Package | |
| ML22003A169 | List: |
| References | |
| Download: ML22027A389 (19) | |
Text
Guidance and Other Decommissioning Initiatives Cynthia Barr, Senior Risk Analyst Division of Decommissioning, Uranium Recovery, and Waste Programs
Guidance Updates 2
NUREG-1757, Consolidated Decommissioning Guidance
Volume 1, Rev. 3, Decommissioning Process for Materials Licensees (to be issued as draft for public comment)
Volume 2, Rev. 2, Characterization, Survey, and Determination of Radiological Criteria (to be finalized summer 2022)
NUREG-1575, Rev. 2, Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM)
(to be finalized)
Significant Changes to NUREG-1757, Volume 1 3
- Provides guidance related to fees as sites transition from the operational to the decommissioning life cycle phase
- Includes new guidance on 10 CFR 20.1406 requirements related to the minimization of contamination
- Updates information on the Site Decommissioning Management Plan (SDMP)
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Major Changes to NUREG-1757, Volume 2 4
Dose modeling updates
Model abstraction and simplification
Exposure scenarios for buried radioactivity
Consideration of elevated areas
Support for distribution coefficients
Uncertainty analysis considerations Radiological surveys updates
Surveys of open excavations
Surveys of soils/materials for reuse
Alternative statistical tests
Composite sampling
NUREG-1757 Path Forward 5
Volume 1, Rev. 3, has been developed and is expected to be issued for public comment in late 2022 Volume 2, Rev. 2, was issued for public comment in December 2020 (ADAMS Accession No. ML20273A010)
Over 200 comments in nine comment letters Final publication expected in summer 2022 Interim guidance to be developed later in 2022/2023 to address remaining comments
MARSSIM, Revision 2 6
EPA leads the working group for this multiagency guidance document Notable updates include
Scan-only surveys
Statistical tests and associated parameters
Treatment of elevated areas
Measurement quality objectives
Updated field instruments
Rank set sampling Public comment period ended February 2022 Science Advisory Board peer reviewed
MARSSIM, Revision 2, Comments Scan survey considerations (validation, metrics)
Need for guidance in the areas of
Modern survey systems with data logging
Discrete radioactive particles
Subsurface radiological surveys Measurement quality objectives/uncertainty Scenario B applicability/test parameters Surrogate ratios for hard-to-detect radionuclides Additional examples for multiple radionuclides
Other Decommissioning Guidance and Code Development Initiatives 8
Subsurface investigations guidance Discrete radioactive particles guidance Visual Sample Plan (VSP) computer code improvements
Subsurface Investigation Guidance 9
Workshop held July 2021 with over 160 participants SC&A technical report to be completed March 2022 VSP scoping tools report to be completed April 2022 Second workshop planned for May 11, 2022, to accept comments on technical report and discuss proposed methodologies Interim guidance to be completed in late 2022/early 2023
Discrete Radioactive Particles (DRP) 10 DRP survey methods DRP dosimetry
Skin dose
Inhalation and ingestion dose
Exposure scenarios How to control DRPs Workshops to take place late 2022 Need for interim guidance or some other form of communication currently under staff consideration
Visual Sample Plan (VSP) 11 Prospective and retrospective power curvesScenario B Calculation of reference area variability (Kruskal-Wallis/
ANOVA) with user specification of test parameters Quantile test parameters (power, quantile/critical value)
Add three-dimensional capabilities Scoping out subsurface survey tools Add tools for modern data logging systems (without surveyor vigilance or with autonomous vehicles)
Conclusions 12 Several guidance initiatives are completed or well underway to share lessons learned and experience from the review of license termination plans and final status surveys NRC has contracted work to improve the guidance in complex technical areas not currently addressed in Federal guidance NRC has solicited feedback from stakeholders and provided opportunities for public participation in the process; additional opportunities are planned Improvements to computational tools are being made to facilitate survey design, data analysis, and risk assessment NRC is committed to working with its stakeholders to increase the timeliness and efficiency of the decommissioning process while ensuring public health and safety during and following decommissioning and site release
Back-up slides 13
14 Regional Sta:
Michael LaFranzo, Region III, Health Physics Inspector NRC Headquarters Sta (Volume 1):
Christopher J. Grossman, Project Manager Stephen Giebel, Health Physicist Allen Gross, Risk Analyst Kenneth Kline, Financial Analyst NRC Headquarters Sta (Volume 2):
Cynthia Barr, Senior Risk Analyst Greg Chapman, Health Physicist Sheldon Clark, Office of the General Counsel Leah Parks, Risk Analyst Adam Schwartzman, Risk Analyst NUREG-1757 Team Members
NUREG-1757, Volume 1 Contact Information 15 Christopher J. Grossman christopher.grossman@nrc.gov 301-415-0140
NUREG-1757, Volume 2 Contact Information 16 Cynthia Barr cynthia.barr@nrc.gov 301-415-4015
MARSSIM Contact Information 17 Sarah Tabatabai sarah.tabatabai@nrc.gov 301-415-2382 Kathryn Snead snead.kathryn@epa.gov 202-343-9228
Discrete Radioactive Particle Contact Information 18 Gregory Chapman gregory.chapman@nrc.gov 301-415-8718 David Brown david.brown@nrc.gov 301-415-7677
Subsurface Investigations and VSP Contact Information 19 Tom Aird thomas.aird@nrc.gov 301-415-2442 Kerstun Norman kerstun.norman@nrc.gov 301-415-5883