Lesson Learned Statement:Grouting the floor of the Acid Recovery Pump Room (ARPR) provided a smooth surface, assisted in encapsulating remaining radioactive particulates and Asbestos Containing Material (ACM) within the work area.
Discussion:The project entailed the decontamination of the ARPR in its entirety. Decontamination efforts encompassed the removal of all loose debris from the ARPR and vacuuming the ARPR floor. Permanent utilities to the ARPR had to be isolated. The process lines within the ARPR were drained of liquids as necessary and subsequently isolated to ensure against inadvertent intrusion of additional liquids. The tank, pumps, electrical and instrumentation components, process and utility piping, HEPA filters, and miscellaneous debris were size reduced as necessary and removed from the ARPR. The final state of the ARPR is that the walls, ceiling, and floor are free of any components or equipment.
Analysis:The ARPR work area floor was vacuumed to remove loose debris and reduce the Derived Air Concentration (DAC) levels as a result of particulate entrainment. This work activity proved unsuccessful.
Recommended Actions:It was determined that the ARPR work area floor would require grouting. This would provide a smooth work surface for subsequent work activities within the ARPR, encapsulate any remaining radioactive particulate not removed during the vacuuming activities and encapsulate any remaining ACM. In addition, the grout placement would reduce the radiation levels within the ARPR work area and allow reduction in the dose accumulation for the personnel who would be performing additional work activities in the ARPR. The grout placement provided an acceptable work surface, provided encapsulant for ACM and radioactive particulate matter and reduced the radiation levels from 33 mr/hr general area to 12 mr/hr general area.
Originator:West Valley Nuclear Services, W.F.Scott, II at (716) 942-4642
Contact:W.F.Scott, II at (716) 9424642
Name Of Authorized Derivative Classifier:N/A
Name Of Reviewing Official:N/A
Priority Descriptor:Green / Good Work Practice
Keywords:DECONTAMINATION; WASTE REMOVAL
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DOE Function / Work Categories:Decontamination & Decommissioning
ISM Category:Feedback and Improvement
Hazard:Personal Injury / Exposure - Radiation / Contamination
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