ML083220260
| ML083220260 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 11/04/2008 |
| From: | DTE Energy |
| To: | NRC/FSME/DWMEP/DURLD |
| Shared Package | |
| ML083220260 | List: |
| References | |
| TAC J00334 | |
| Download: ML083220260 (6) | |
Text
a, 11/4/2008 DTE Energy-Fermi I License Termination Plan Lynne Goodman Ken Lindsey Marty Erickson-Fermi I Custodian Fermi I Health Ucense Terminaiaon -
Physicist Manager November 05, 2008
- Introduction
- Purpose of the Meeting
- Fermi 1 Decommissioning Status
- Follow-up on Previous Items
- Site Characterization Methodology
- Sensitivity Analysis
- DCGLs
- Historical Site Assessment (HSA)
- EPA Interface
- Future Meeting Topics/Dates
- Meeting Summary/Action Items 1
11/4/2008
-Purpose of the Meeting
- Update the NRC on the status of the Fermi 1 decommissioning project
- Provide the NRC with Fermi 1 Characterization/HSA processes
- Provide methodology and results of:
- Radionuclide Selection
- Sensitivity Analysis
- DCGLs
- Obtain NRCfeedback Fermi
... Decommissioning Status*
- Primary system sodium reacted
- NaK lines removed or flushed
- Graphite block weathering
- Liquid waste system removal starts this year
- Reactor Building cleanup and decon.
N Fermi I Decommissioning Status
- Energy Solutions on site for large component and vessel removal
- Schedule shows work complete Jan. 2010
- Draft 50.59 for reactor vessel does not result in a need for license amendment 2
11/4/2008
~'Follow-up Items
- Fermi 1 site being within Fermi 2 Owner Controlled Area
- Results of Excavations Samples and Surveys 7
- Site Characterization
- Performed to support the HSA and LTP
- Provide data supporting the initial classification
- Surveys
- Beta fixed-point measurements
- Beta scans
- Gamma scans
- Loose surface contamination surveys (smears)
- Excavation survey/sampling
- Results
- No unexpected results 8
Sensitivity Analysis RESRAD-Build Version 3.4 for Building Surfaces (Building Occupancy)
- Pathways: 1) direct extemal exposure from the source (i.e., the floor, walls, and ceiling), 2) external exposure from deposited material, 3) external exposure due to air submersion, 4)
- exposure due to inhalation of airborne radioactive material, and
- 5) inadvertent ingestion of radioactive material.
RESRAD Version 6.4 for Soil (Resident Farmer)
- Pathways: 1) direct radiation exposure, 2) inhalation of airborne dust, 3) ingestion of plants, 4) ingestion of meat. 5) ingestion of milk, 6) ingestion of groundwater, and 7) ingestion of aquatic foods, and 8) inadvertent ingestion of soil contaminates.
3
11/4/2008 1.Sensitivity Analysis (continued)
Initial Parameter Selection Parameter Classification Priority Ranking Assignment Deterministic or Stochastic Behavioral and Metabolic Parameters: Deterministic Physical Parameters: Stochastic
- Pnortty 1 & 2: Use Distibution Values InNUREGS
- Priority 3: Use Default Values is
-Sensitivity Analysis (continued)
- Used the Probabilistic Modules of RESRAD-Build and RESRAD
- Latin Hypercube Sampling (LHS) technique (300 & 2000 observations)
- Sensitivity Criteria (PRCC-Partial Rank Correlation Coefficient)
- IPRCCI _010 for RESRAD-Build and IPRCCI > 0.25 for RESRAD
- Negative Correlation use 25 Percentile
- Positive Correlation use 75 Percentile 11 Proposed Values for Sensitive Parameters "Proposed Values for Input Parameters for Building Surface DCGLs', is available upon request
' Proposed Values for Input Parameters for Soil DCGLs",
is available upon request 12 4
11/4/2008 DCGLs
- Building occupancy scenario
- Modified inputs to account for moderate to heavy work activities
- 365 day exposure duration Breathing rate 45.6 raid S
- Inadvertent ingestion
- Resident farmer
- If groundwater is an influence, the DCGLs will be scaled back to reflect the dose contribution from this source
- No groundwater contamination present at Fermi I 13 DCGLs (Continued)
Building surface DCGLs BeadingO e- LddingSrrface Nuid (4 MOo Nuctide(dp 00Ocmn A-1s8 1E+04 H3 2.9E+08 Ae-241 60.OE03 Mfl.Ad 4.2E+04 C-14 1.E4607 Na-22 "3E404 Ce-242 3.16.6 Nb-Ad I.5E+04 c.-2d3 7.212403 N u- l e6.id 0 C."O 1.16.04 W4-3 3.66.07 c-.1340m 7EE+4 Pu-23e 5.71E+03 Cs-137 13.E04 PM-23 5. 1E+0__3 m-I263 .26.01 N-' 9 0. 1E403 6.-134 8 3E+04 P u-2! 2.767E0---6ý F0-6 4.E16 07 Sr-0 1 .4E+0---
Eu-lea 3.6E+06 ab-1245-* 0.02-Ad DCGLs (Continued)
Sr-A 1.4E6.07 Tc-99 IAE+07 Ac,-408 7.6.D01 H,-3 3.16E.04 co-o0 5.16*00 N0.43 40.OE03 Ce.434 8.3E+00 Pu-238 1.6E.02 Cs-17 .7.1P-3 1.62 Ec-45s 4.IE06.2O-3 .6 5
11/4/2008 YHistorical Site Assessment (HSA)
- Documents a comprehensive investigation that
- Describes the site's physical configuration
- Identifies the radioactive constituents of site contamination
- Assesses the migration of contaminants
- Identifies contaminated media
- Considers impacts of continuing decommissioning activities
- Classifies impacted areas HSA is nearing completion YRadionuclide Selection
- Develop theoretical suite of nuclides
- Previous analyses
- Activafion analyses
- Radionuclides with T1r2< 2 years omitted
- Radionuclides contributing <0.1 percent to the total activity omitted
- Evaluate compliance with dose criteria for discounting
- DandD (0.51% residential and 0.02% occupancy)
- FGR 11(.03% inhalation and 0.004% ingestion)
- FGR 12 (no extemal dose component> 0.006%)
17 KyUpcoming Dates " ... ,
- LTP Draft complete - February 2009
- LTIP Submittal - Spring 2009
- LTP Public meeting - Summer 2009
- Reactor vessel and large component shipping -July -
November 2009 6