ML26027A205
| ML26027A205 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 01/27/2026 |
| From: | Omaha Public Power District |
| To: | Division of Decommissioning, Uranium Recovery and Waste Programs |
| References | |
| Download: ML26027A205 (0) | |
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Page 1 of 7 RSI-1: Submit the onsite and offsite characterization and remedial action support survey laboratory data used to determine the statistical data in Table 3-1 for Survey Units 4100, 4101, 9012, and 9014. Submit final status survey onsite and offsite laboratory sample data, along with ISOCS measurement results, for the same survey units to support the data quality assessment (DQA) review.
Rationale: Chapter 9 of MARSSIM recommends that the License Termination Plan (LTP) includes the DQA methods used to evaluate whether the collected data meets the survey objectives and are sufficient to demonstrate compliance. Section 5.5, Final Status Survey Data Assessment, outlines the key components of the DQA process. Laboratory and field measurement data for radionuclides are essential for a comprehensive evaluation of both the quality and quantity of data and are integral to the overall DQA.
OPPD Response:
OPPD has included the requested documents as attachments to this response. The following table summarizes the provided documentation.
Survey Unit Data Type Documentation Comment 4100 Char onsite N/A Char offsite N/A RASS onsite Samples with "R" in 7th position RASS offsite "4100 RASS offsite" FSS onsite Samples with "F" in 7th position FSS offsite "4100 & 9012 FSS offsite" & "4100 FSS onsite" 4101 Char onsite N/A Char offsite N/A RASS onsite Samples/measurements with "R" in 7th position RASS offsite "4101 RASS offsite" FSS onsite N/A FSS offsite N/A 9012 Char onsite Samples with "C" in 7th position There is a data discrepancy regarding Table 3-1 and the relative shift in the SURR.
Relative shift is unchanged using the provided data.
Char offsite N/A RASS onsite N/A RASS offsite N/A FSS onsite Samples/measurements with "F" in 7th position FSS offsite "4100 & 9012 FSS offsite" & "4100 FSS onsite" 9014 Char onsite "9014 Characterization Data" spreadsheet There is a data discrepancy regarding Table 3-1 and the relative shift in the SURR.
Page 2 of 7 Survey Unit Data Type Documentation Comment Relative shift is unchanged using the provided data.
Char offsite N/A RASS onsite N/A RASS offsite N/A FSS onsite Samples with "F" in 7th position FSS offsite "9014 FSS offsite" RSI-2: Submit scanning survey results for Survey Units 4501 and 9014 to support the evaluation of scanning surveys and investigation levels.
Rationale: Guidance provided in MARSSIM, Section 5.5, recommends an integrated survey strategy for Class 3 survey units, including random measurements and scanning surveys. These surveys are used to identify locations within the survey unit that exceed an investigation level, so that these areas can undergo additional investigation to determine concentration, area, and extent of contamination. Table 5-33 of the LTP specified investigation levels by survey unit classification. Scanning results serve as a comparison point to the investigation levels and subsequent actions.
OPPD Response:
The tables presented below detail the scan data collected for the FSSs of survey units 4501 and 9014.
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Page 7 of 7 Supplemental Information Request:
- FCSD-RA-LT-308, Radiation Survey with Pipe Detectors
- FC-24-006, Ludlum 44-20 Detector Sensitivity
- FCSD-RA-LT-303, Final Status Survey Isolation and Control Measures
- Any Condition Reports associated with the identification of discrete radioactive objects in SU 9010 and SU 9011.
OPPD Response:
OPPD has included the requested documents as attachments to this response.