ML101940279
| ML101940279 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 11/14/2008 |
| From: | Kuzo G NRC/RGN-II/DRS/PSB1 |
| To: | Conatser R, Heather Gepford, Randy Musser Division of Inspection and Regional Support, NRC/RGN-II/DFFI, NRC/RGN-II/DRP/RPB4 |
| References | |
| FOIA/PA-2010-0209 | |
| Download: ML101940279 (2) | |
Text
Gepford, Heather From:
George Kuzo Sent:
Friday, November 14, 2008 8:10 AM To:
Randy Musser; Heather Gepford; Richard Conatser; Joseph Austin Cc:
Subject:
FW: cross section.pdf - Adobe Acrobat Professional Attachments:
cross section.pdf During the November 13, 2008 BSEP telecon regarding status of Storm Drain Stabilization Pond (SDSP) H-3 monitoring/remediation activities and other onsite H-3 monitoring activities, intermediate depth well 19B which sampled immediately above the Castle Hayne aquifer, was identified as having elevated H-3 concentrations of H-3. Those elevated H-3 concentrations are outliers relative to tritium concentration results reported for other intermediate wells. The licensee stated that semi-permeable geological layers are less robust in this specific area beneath the pond and are believed to be a contributing factor to the observed elevated H-3 concentration results.
FYI as a follow-up, this is a schematic provided by the licensee regarding the underlying geological substrates and the location of the various aquifers in this area. We will continue to focus on the results for this intermediate well (19b) results as a potential problem which could lead to contamination of the intermediate aquifer.
From: Millinor, Mike [1]
Sent: Thursday, November 13, 2008 1:43 PM To: George Kuzo
Subject:
cross section.pdf - Adobe Acrobat Professional
A SE A'
NW 0
3:
- 0) 00 W
0 4C N1 N
U) wd Storm Drain Stabilization Pond j) r U)
U) wJ U)
I, 0- -100-
-150-A
~-
-50
-100
-150 Surficial Sand Deposits (Quatemary)
Undifferentiated Pleistocene and Pliocene Deposits (Quatemary-Tertiary)
Castle Hayne Formation (Tertiary)
Peedee Formation (Upper Cretaceous) 0 500' i
1000' Sandy Fill Material Wetlands Z
Upper Sand Unit I Lower Sand Unit Low Permeability Unit (Unnamed)
Iw i Limestone (Castle Hayne Formation)
Low Permeability Unit (Peedee Confining Unit)
Peedee Formation Shallow Surficial Aquifer Intermediate Surficial Aquifer Peedee Aquifer Progress Energy Brunswick Nuclear Plant Southport. NC Figure 3-4 Cross Section A-A' Groundwater Flow Direction SIS-i Silar Services Inc.