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<td><a href="https://misportal.jlab.org/ll/index.jsf?function=view&lessonId=1164">ACC-21-0818 Waste Acid Production </a></td>
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<h2 style="white-space:nowrap">Statement of Lessons Learned</h2>
<pre>On Aug. 18, 2021, Accelerator Division and ES&H staff discovered cryomodule refurbishment activities involved acid cleaning of components that had not been evaluated for potential activation. It was determined that this could result in the release of the acid waste without radiological monitoring. The presence of low-level radioactive material (RAM) in the waste acid would require a different disposal channel than that currently utilized, and would need to include a detailed analysis of waste acid by the Radiation Control staff.
The available data on past components subject to acid cleaning, indicated that some of the past waste acid shipments may have exceeded the radiological release criterion of Indistinguishable from Background (IFB), which requires disposal as Mixed Low-Level Waste.
</pre>
<h2 style="white-space:nowrap">Discussion of Activities</h2>
<pre>Review of the acid cleaning of activated cavity-pair end-dishes process determined that no radiological assessment was being performed prior to initiation of the process nor was one performed on the waste acid after the activity. Waste acid has been collected, stored, and shipped for off-site disposal (incineration), normally at a Cleveland, OH facility.
Data indicates a total of eight previous shipments, dating back to June of 2017 were potentially impacted.
Two waste acid batches were still available on site. One was "in process" at the time of discovery, another was in storage.
</pre>
<h2 style="white-space:nowrap">Analysis</h2>
<pre>Activity of previous batches of waste acid was estimated based on the lab's sample activity to dose rate ratios for the period identified. The results indicate that these earlier batches (perhaps half, on average) would not have met the lab's indistinguishable from background (IFB) criteria and should have been designated radioactive.
Both on site batches of waste acid were analyzed. Based on Jefferson Lab's release protocols, these batches met release criteria as indistinguishable from background (IFB).
</pre>
<h2 style="white-space:nowrap">Recommended Actions</h2>
<pre>Accelerator Division and ES&H reviewed all Superconducting Radiofrequency (SRF) work processes involving RAM and are to develop procedures for handling waste acid to ensure appropriate disposal selection.
The facility that receives and incinerates Jefferson Lab waste acid was notified of the potential that past shipments may have contained mixed waste.
Both batches of acid waste on site were segregated, precautionarily labeled and analyzed. Based on our release protocols, these batches would meet release criteria as indistinguishable from background (IFB). Based on sample activity to dose rate ratios, it is estimated the activity in previous waste batches (perhaps half, on average) would not have met IFB criteria and should have been designated radioactive.
</pre>
<h2 style="white-space:nowrap">JLab Preventive Measures</h2>
<pre></pre>
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<h2>Comments</h2>
<h5 style="white-space:nowrap">1/25/2022 12:49:39 PM by Bailey, Mary Jo</h5>
<pre>submitted to those current in
SAF830: RAM Shipping/Receiving</pre>
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<fieldset>
<legend>Summary</legend>
<table>
<tr class="row">
<td class="label" nowrap>Lesson ID:</td>
<td class="dataval">1164</td>
</tr>
<tr class="row">
<td class="label" nowrap>Status:</td>
<td class="dataval">OK</td>
</tr>
<tr class="row">
<td class="label" nowrap>Doc ID:</td>
<td class="dataval">2022-JLAB-1164</td>
</tr>
<tr class="row">
<td class="label" nowrap>Priority:</td>
<td class="dataval">Best Practice</td>
</tr>
<tr class="row">
<td class="label" nowrap>Safety Related:</td>
<td class="dataval">YES</td>
</tr>
<tr class="row">
<td class="label" nowrap>Originator:</td>
<td class="dataval">Bailey, Mary Jo</td>
</tr>
<tr class="row">
<td class="label" nowrap>Issued:</td>
<td class="dataval">1/25/2022 12:46:15 PM</td>
</tr>
<tr class="row">
<td class="label" nowrap>Approved By:</td>
<td class="dataval">Bailey, Mary Jo</td>
</tr>
<tr class="row">
<td class="label" nowrap>Approved On:</td>
<td class="dataval">1/25/2022 12:49:39 PM</td>
</tr>
<tr class="row">
<td class="label">Source:</td>
<td class="dataval">
<a href="https://misportal.jlab.org/railsForms/notable_events/122864/edit" target="_blank">TJNAF NE</a>
</td>
</tr>
<tr class="row">
<td class="label" nowrap>Location:</td>
<td class="dataval">TJNAF</td>
</tr>
<tr class="row">
<td class="label" nowrap>Cost Savings:</td>
<td class="dataval"></td>
</tr>
<tr class="row">
<td class="label" nowrap>Contact:</td>
<td class="dataval">Harry Fanning, Accelerator Safety Officer, (Fanning@jlab.org )</td>
</tr>
<tr class="row">
<td class="label" nowrap>Queued Emails:</td>
<td class="dataval">103</td>
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<tr class="row">
<td class="label" nowrap>Sent Emails:</td>
<td class="dataval">0</td>
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<tr class="row">
<td class="label" nowrap>Viewings:</td>
<td class="dataval">1 times</td>
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<li>Radiation - Ionizing</li>
<li>Storage & Handling of Radioactive Materials</li>
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<legend>Skills</legend>
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<li>SAF830: RAM Shipping/Receiving</li>
</ul>
</fieldset>
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<li>*Division Safety Officers (DSOs)</li>
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