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Hello,</div>
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<br>
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Could you please re-open this NCR</div>
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Thanks,</div>
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Naeem<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> FOREHAND@JLAB.ORG <FOREHAND@JLAB.ORG><br>
<b>Sent:</b> Monday, June 13, 2022 8:22 AM<br>
<b>To:</b> Danny Forehand <forehand@jlab.org><br>
<b>Cc:</b> Ed Daly <edaly@jlab.org>; Naeem Huque <huque@jlab.org>; Danny Forehand <forehand@jlab.org>; Juan Jordan <jjordan@jlab.org><br>
<b>Subject:</b> Rework Done: NCR:530 on SNSPPU-CLNRM-CST-LEAK-R1--7</font>
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<p>An Staff/Technician has reworked Non-Conformance Report - sequence number 530 for traveler SNSPPU-CLNRM-CST-LEAK-R1--7.
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<table border="1" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td colspan="2"><strong>PAGE 3: MODIFICATION/RE-MEASURE</strong> </td>
</tr>
<tr>
<td>Rework Staff: </td>
<td>JJORDAN <br>
JJORDAN <br>
FOREHAND <br>
<br>
<br>
</td>
</tr>
<tr>
<td>Rework Date: </td>
<td>15-May-2022 <br>
17-May-2022 <br>
20-May-2022 <br>
<br>
<br>
</td>
</tr>
<tr>
<td>Rework Comment: </td>
<td>15May2022 Bagged bellow joints between cav 2 and 3 separately to purge with nitrogen and identify leak. Cav 2 downstream leak sized at 4.96e-06 Torr L/s Cav 3 upstream no leak detected. Started bagging Cav 1 and 2 section. 16May2022 Finished bagging between
Cav 1 and 2. Purging bellows with nitrogen while spraying one FPC at a time with He. Cav 1 FPC no leak detected. Cav 2 FPC Leak sized at 1.28e-07 Torr L/s. After allowing scan to recover started with Cav 1 downstream bellows no leak detected. Cav 2 upstream
bellows leak sized at 3.98e-09 Torr L/s. Increased torque for all 3 flanges to 35 ft lbs. Cav 2 downstream bellows now at 1.06e-06 Torr L/s. Cav 2 upstream bellows now at 2.67e-09 Torr L/s. Cav 2 FPC no leak visible.
<br>
17May2022 Increased torque on Cav 2 upstream and downstream to 40 ft lbs. Cav 2 downstream bellows now at 4.41e-07 Torr L/s. Cav 2 upstream bellows now at 3.4e-09 Torr L/s. Increased torque on Cav 2 upstream and downstream to 45 ft lbs. Cav 2 downstream bellows
now at 3.6e-07 Torr L/s. Cav 2 upstream bellows now at 4.12e-09 Torr L/s String isolated to swap over to slow bleed up line. Slow bleed up started at 2:06pm.
<br>
18May2022 Gasket changed on Cav 2 upstream 19May2022 Bellows changed between Cav 2-3. Slow pump down started. 20May2022 Leak in bag 3 sized at 1.72e-08 Torr L/s. Leak in bag 4 sized at 3.49e-09 Torr L/s. Bagged Cav 2-3 bellows individually as well as Cav 2
upstream and FPC. Started narrowing leaks down after lunch. Cav3 upstream no leak visible after 5 mins of helium spray. Cav2 downstream leak sized at 1.35e-08 Torr L/s. Cav2 upstream leak sized at 3.05e-09 Torr L/s. Cav 2 FPC leak sized at 3.27e-11 Torr L/s.
Increased torque on Cav2 upstream and downstream to 50ft lbs. Cav2 downstream no leak detected. Cav2 upstream no change.
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</td>
</tr>
<tr>
<td>Verify Staff: </td>
<td>FOREHAND <br>
FOREHAND <br>
JJORDAN <br>
<br>
<br>
</td>
</tr>
<tr>
<td>Verify Date: </td>
<td>15-May-2022 <br>
17-May-2022 <br>
20-May-2022 <br>
<br>
<br>
</td>
</tr>
<tr>
<td>Verify Comment: </td>
<td><br>
<br>
<br>
<br>
<br>
</td>
</tr>
<tr>
<td colspan="2"> </td>
</tr>
<tr>
<td colspan="2"><strong>ENGINEER RESPONSE</strong> </td>
</tr>
<tr>
<td>Response Engr: </td>
<td><br>
<br>
<br>
<br>
<br>
</td>
</tr>
<tr>
<td>Response Date: </td>
<td><br>
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<br>
<br>
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</td>
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<tr>
<td>Disposition: </td>
<td>Hold/Modify </td>
</tr>
<tr>
<td>Disposition Comment: </td>
<td><br>
<br>
<br>
<br>
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</td>
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<tr>
<td colspan="2"><strong>PAGE 2: FIRST DISPOSITION</strong> </td>
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<tr>
<td>Response Engr: </td>
<td>FOREHAND </td>
</tr>
<tr>
<td>Response Date: </td>
<td>08-Jun-2022 </td>
</tr>
<tr>
<td>Disposition: </td>
<td>Hold/Modify </td>
</tr>
<tr>
<td>Disposition Comment: </td>
<td>Try to improve leaks to an acceptable rate before turning over string to CMA. </td>
</tr>
<tr>
<td colspan="2"> </td>
</tr>
<tr>
<td colspan="2"><strong>PAGE 1: INITIATE AND DESCRIBE</strong> </td>
</tr>
<tr>
<td>SN: </td>
<td>PPU-06 </td>
</tr>
<tr>
<td>SNtype: </td>
<td>CSTSN </td>
</tr>
<tr>
<td>DRAWING NUM: </td>
<td>104211500-M8U-8200-A001 </td>
</tr>
<tr>
<td>PART DESCRIPTION: </td>
<td>CRYO STRING ASSEMBLY </td>
</tr>
<tr>
<td>TRAV_ID: </td>
<td>SNSPPU-CLNRM-CST-LEAK </td>
</tr>
<tr>
<td>TRAV_REV: </td>
<td>R1 </td>
</tr>
<tr>
<td>TRAV_SEQ_NUM: </td>
<td>7 </td>
</tr>
<tr>
<td>DESCRIBE STAFF: </td>
<td>FOREHAND </td>
</tr>
<tr>
<td>DESCRIBE DATE: </td>
<td>2022-06-08 15:18:00.0 </td>
</tr>
<tr>
<td>DESCRIBE COMMENT: </td>
<td>The total leak rate of the string is higher than the specified 3E-10 Torr l/s. The first leak is approx. 3.3E-6 Torr l/s. The second is approx. 6.5E-8 Torr l/s. </td>
</tr>
<tr>
<td>NOTIFICATION COMMENT: </td>
<td> </td>
</tr>
</tbody>
</table>
</p>
<p>The NCR is at the following URL: <a target="_blank" href="https://pansophy.jlab.org/pansophy/Travelers/TRAVELER_FORM.cfm?project=SNSPPU&area=SNSPPU&system=CLNRM&TRAV_ID=SNSPPU-NCR&TRAV_REVISION=R12&page=3&maxpage=4&TRAV_SEQ_NUM=530&travstat=&serialnum=PPU-06&SN=PPU-06&SNTYPE=CSTSN">
530</a> </p>
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