ML22117A072

Public Meeting Notice, Detailed Agenda, 2nd Annual Subsurface Investigations Workshop

ML22117A072
Person / Time
Issue date:	05/11/2022
From:	Cynthia Barr NRC/NMSS/DDUWP/RTAB
To:
Barr C
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ML22117A070	List: ML22117A072 ML22126A171 ML22136A110 ML22136A116 ML22143A891
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Download: ML22117A072 (2)

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PUBLIC MEETING DETAILED AGENDA Rev. 0 Second Annual Subsurface Investigations Public Workshop May 11, 2022, 12:00 PM to 05:00 PM ET Microsoft Teams meeting (see meeting notice for access information)

Time Topic Speaker NRC Jane Marshall/

12:00 pm #0 Welcome and Logistics Ashley Roberts and Brett Klukan NRC:

Opening Remarks Cynthia Barr/

Tom Aird 12:10 pm #1 NRC Opening Remarks NEI:

1. 2 NEI Opening Remarks Bruce Montgomery Overview presentations:

SC&A:

1. 3 Methodologies for Optimization of Survey Design Carl Gogolak 12:40 pm PNNL:

1. 4 Statistical Methods for Subsurface Surveys to Deborah Fagan Support Decommissioning Discussion Period

1. 3 Potential Discussion Questions

i. What are methods to determine the elevated area size of concern?

ii. Is the use of the Bayesian Ellipgrid to detect elevated areas of a certain size appropriate for MARSSIM users and use scenarios?

iii. What should be the criteria for secondary sampling?

iv. Is the use of Markov Bayes appropriate for MARSSIM 1:20 pm users and use scenarios? All

1. 4 Potential Discussion Questions

i. How does the number of samples (boreholes) change for estimation versus prediction?

ii. How would a stratified sampling design effectively estimate a statistic to compare to a dose threshold?

iii. Can a stratified design be used to krig?

iv. What are the temporal considerations for estimation and prediction?

2:00 pm Break RSCS:

2:10 pm #5 Groundwater Monitoring Programs Under Matt Darois

NEI-07-07 Eric Darois and #6 Applicability of the Basement Fill Model Discussion 2:50 pm All

1. 5 and #6 discussion questions coming soon DOE:

1. 7 DOE Challenges with Subsurface Investigation Amanda 3:20 pm and Site-Specific Case Study Anderson

1. 8 Using Electrical Resistivity Tomography (ERT)

PNNL/DOE:

and Other Geophysical Methods to Non-Invasively 3:40 pm Tim Johnson Inform Subsurface Investigations Related to Fred Day-Lewis Decommissioning 4:00 pm Break

1. 9 Lessons Learned Identified during Independent ORAU/ORISE:

4:10 pm Verification Activities David King Discussion

1. 7 discussion questions coming soon

1. 8 Potential Discussion Questions

i. How has ERT been used at Nuclear Power Plants (NPPs) or other sites with residual subsurface radioactivity?

ii. How can ERT imaging be used to guide and/or reduce direct borehole sampling requirements?

iii. What are the limitations of using ERT at NPPs?

4:30 pm iv. How can ERT be used to understand processes or All performance of remedial actions taken to mitigate subsurface radionuclide contamination?

1. 9 Potential Discussion Questions

i. What techniques have been used to survey excavations and other hard-toaccess locations that may be unsafe for surveyors to enter?

ii. What is ALARA when looking for discrete sources or elevated areas in the subsurface?

iii. Is it important to relate survey design to the dose modeling assumptions used to derive DCGLs?

5:00 pm Adjourn