ML100120060
| ML100120060 | |
| Person / Time | |
|---|---|
| Site: | Plum Brook File:National Aeronautics and Space Administration icon.png |
| Issue date: | 01/06/2010 |
| From: | Peecook K US National Aeronautics & Space Admin (NASA) |
| To: | Glenn C NRC/FSME |
| Shared Package | |
| ML100120073 | List: |
| References | |
| Download: ML100120060 (3) | |
Text
From:
Peecook, Keith M. (GRC-QD00) [keith.m.peecook@nasa.gov]
Sent:
Wednesday, January 06, 2010 2:12 PM To:
Glenn, Chad Cc:
Thomas, John A. (GRC-QD00)[Science Application International Corp.];
Case, Roderick C. (GRC-QD00)[SAIC]; Kolb, Peter C. (GRC-QS00); Stoner, William G. (GRC-QD00)[SAIC]; Kurian, Varughese; Webb, James; Pinkston, Karen; Guo, Lifeng
Subject:
RE: Revised Plum Brook Remediation Approach memo Attachments:
PB correspondance.ppt; 298NaI-Cs137plotRDH3BAP1.xls
- Chad, Thank you for your response to our proposed Remediation Approach for Plum Brook. The suggestion you have given us for providing information that shows the past correlation between instrument readings in the field and results in the lab is easy to respond to as we already have that data. Please see the attached documents for the basis of using 300 cpm on the NaI detectors as our action level (corresponds to 3.5 pCi/gm Cs-137 in soil). A similar, confirmatory effort will be written into the procedure for the lower meander section.
If there are questions or issues with this response we can discuss them at tomorrows telecon, or at some future date.
- Thanks, Keith From: Glenn, Chad [1]
Sent: Wednesday, December 23, 2009 9:45 AM To: Peecook, Keith M. (GRC-QD00)
Cc: Thomas, John A. (GRC-QD00)[Science Application International Corp.]; Case, Roderick C. (GRC-QD00)[SAIC]; Kolb, Peter C. (GRC-QS00); Stoner, William G. (GRC-QD00)[SAIC]; Kurian, Varughese; Webb, James; Pinkston, Karen; Guo, Lifeng
Subject:
RE: Revised Plum Brook Remediation Approach memo
- Keith, NASA's revised Plum Brook Remediation Approach appears reasonable. We offer one additional suggestion for your consideration since ALARA is integral to the radiological criteria for unrestricted use.
Based on NASA's proposed approach, this remediation activity will employ the same detectors (Ludlum Model 2350-1 with 44-10 sodium iodide detector, and a gamma-spectrum window set to focus of Cs-137 activity or an equivalent) used during characterization surveys to locate (via know GPS coordinates) and remove elevated spots (spots above 13.34 pCi/g). Also, for the Lower Meander section which was not previously fully characterized, NASA will perform a 100% survey of the bank area, and will mark areas above the Remediation Action Limit. The location of these areas and the preremediation cpm readings will be noted (including GPS coordinates) and marked, and remediation will take place as in other areas.
Suggestion for NASA Consideration:
Since NASA remediation approach relies on detectors from previous characterization (and approach does not discuss new sampling), to identify elevated spots for removal, suggest that NASA consider providing information with the documentation of this activity (e.g., via plot/diagram, other) showing: (1) how past scan data (cpm) coorelates with past sampling data (pCi/g), and (2) how scan results in Section 2 (Lowever Meander section which was not previously fully characterized) correlate with scan results and sediment sample results from previous characterization. NASA could also choose to take additional samples in Section 2 to further validate this correlation.
- Thanks, Chad From: Peecook, Keith M. (GRC-QD00) [2]
Sent: Wednesday, December 09, 2009 8:51 AM To: Glenn, Chad Cc: Thomas, John A. (GRC-QD00)[Science Application International Corp.]; Case, Roderick C. (GRC-QD00)[SAIC]; Kolb, Peter C. (GRC-QS00); Stoner, William G. (GRC-QD00)[SAIC]
Subject:
Revised Plum Brook Remediation Approach memo
- Chad, I discovered one error in the memo I sent yesterday. It had to do with the background level in the area, which appears early in the first paragraph. The rest of the memo is the same, and a copy is attached. Sorry for any confusion.
- Thanks, Keith E-mail Properties Mail Envelope Properties (AB4ED7B1474A374AACAB23B38B104A99047748F3D9)
Subject:
RE: Revised Plum Brook Remediation Approach memo Sent Date: 1/6/2010 2:11:59 PM Received Date: 1/6/2010 2:11:59 PM From: Peecook, Keith M. (GRC-QD00)
Created By: keith.m.peecook@nasa.gov Recipients:
Chad.Glenn@nrc.gov (Glenn, Chad)
Tracking Status: None
john.a.thomas@nasa.gov (Thomas, John A. (GRC-QD00)[Science Application International Corp.])
Tracking Status: None roderick.c.case@nasa.gov (Case, Roderick C. (GRC-QD00)[SAIC])
Tracking Status: None peter.c.kolb@nasa.gov (Kolb, Peter C. (GRC-QS00))
Tracking Status: None william.g.stoner@nasa.gov (Stoner, William G. (GRC-QD00)[SAIC])
Tracking Status: None Varughese.Kurian@nrc.gov (Kurian, Varughese)
Tracking Status: None James.Webb@nrc.gov (Webb, James)
Tracking Status: None Karen.Pinkston@nrc.gov (Pinkston, Karen)
Tracking Status: None Lifeng.Guo@nrc.gov (Guo, Lifeng)
Tracking Status: None Post Office:
NDJSSCC05.ndc.nasa.gov Files Size Date & Time MESSAGE 172205 1/6/2010 PB correspondance.ppt 110394 298NaI-Cs137plotRDH3BAP1.xls 37708 Options Expiration Date:
Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: