05000255/FIN-2011003-07
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Finding | |
|---|---|
| Title | Anomalous Environmental Samples |
| Description | The inspectors identified that the licensees evaluation of radioactive material identified in environmental samples was not complete and did not provide data on measurable levels of radiation and radioactive materials in the environment to evaluate the relationship between quantities of radioactive material released in effluents and resultant radiation doses to individuals from principal pathways of exposure. As a result, the inspectors identified a URI for the apparent non-compliance with 10 CFR Part 50, Appendix I, Section IV.B.2. Broad leaf vegetation sampling program was reinitiated at Palisades in 2009. The licensee identified Cs-137 in most of the indicator samples with an average activity of 50.8 pCi/kg. Cs-137 was not identified in any of the control broadleaf samples. The licensees evaluation of these anomalous results was provided in the 2009 Radiological Environmental Operating Report issued May 14, 2010. This evaluation correlated the activity to known plant releases and determined that the amount of Cs-137 identified in the samples was too high to be attributed to plant operations. Consequently, the licensee concluded that all of the Cs-137 resulted from fall out of atmospheric bomb testing. However, the licensee did not use empirical data such as preoperational environmental results or soil samples to support the conclusion. A fundamental objective of environmental sampling is to validate that radioactive material is not entering the environment through unmonitored or inadequately monitored release paths. This licensees explanation of the elevated Cs-137 readings indicates a lack of understanding of the purpose of the program. The evaluation did not consider other plausible scenarios such as unknown, unmonitored releases of radioactive material that could have occurred. The licensee indicated that a more rigorous evaluation review would be completed. The issue remains under review by the NRC and is categorized as a URI pending completion of that revised evaluation and NRC review. (URI 05000255/2011003-07; Anomalous Environmental Samples) |
| Site: | Palisades  |
|---|---|
| Report | IR 05000255/2011003 Section 2RS7 |
| Date counted | Jun 30, 2011 (2011Q2) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71124.07 |
| Inspectors (proximate) | M Holmberg J Cassidy J Ellegood R Walton T Taylor J Beaversa Scarbearye Duncan E Sanchez Santiago J Cassidy J Laughlin M Holmberg M Phalen N Feliz Adomo T Taylor |
| INPO aspect | |
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Finding - Palisades - IR 05000255/2011003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palisades) @ 2011Q2
Self-Identified List (Palisades)
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