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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Amrit Yegneswaran<br>
<b>Sent:</b> Thursday, February 7, 2019 3:35 PM<br>
<b>To:</b> Tyler Lemon<br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 backup manifold test</font>
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good table tyler.</div>
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since the current PPM of H2O is between 20-40.<br>
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ceteris paribus, reducing flow to 20 slm should be ok, PPM would i guess go to 100<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Dsg-rich <dsg-rich-bounces@jlab.org> on behalf of Tyler Lemon <tlemon@jlab.org><br>
<b>Sent:</b> Thursday, February 7, 2019 3:19 PM<br>
<b>To:</b> Patrizia Rossi<br>
<b>Cc:</b> dsg-rich<br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 backup manifold test</font>
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Hello Dr. Rossi,</p>
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For general reference, attached are tables showing how long we can provide backup N2 to RICH based on how many N2 banks we have on hand.
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The first table is the the current setup and flow with the amount of time scaled based on the number of N2 banks. The second table is the amount of time if the regulators on the banks are adjusted to provide 20 slm of backup N2.</p>
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<div>Based on the calculated flow durations, it may be good to procure at least one more N2 bank to have on hand in case it is needed.</div>
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<div>Best regards,</div>
<div>Tyler<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Patrizia Rossi<br>
<b>Sent:</b> Thursday, February 7, 2019 2:04:35 PM<br>
<b>To:</b> Tyler Lemon<br>
<b>Cc:</b> dsg-rich<br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 backup manifold test</font>
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<div class="" style="word-wrap:break-word; line-break:after-white-space">Thank you Tyler for performing the test and let us know how long the N2 backup system will last
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<div class="">patrizia<br class="">
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--------------------------------------------------<br class="">
# Patrizia Rossi<br class="">
# Jefferson Lab <br class="">
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# Suite 5<br class="">
# Newport News VA 23606 (USA)<br class="">
# <a href="mailto:rossi@jlab.org" class="x_OWAAutoLink" id="LPlnk508544">e-mail: rossi@jlab.org</a><br class="">
# phone: +1 (757) 269 7740<br class="">
# fax: + 1 (757) 269 5800<br class="">
# cell: +1 (757) 528 7606<br class="">
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<div class="">On 7 Feb 2019, at 13:58, Tyler Lemon <<a href="mailto:tlemon@jlab.org" class="x_OWAAutoLink" id="LPlnk912861">tlemon@jlab.org</a>> wrote:</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">Hello,</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">The test is complete, the override switch is off and alarms have been re-enabled.</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">Attached are plots of N2 flow to RICH (top plot), the N2 backup manifold's supply pressure (PT2, middle plot), and the N2 backup bank pressure (PT3, bottom plot).</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">During the test (with Denny's help), we closed of the main N2 supply line and observed flow dropping from ~39 slm to ~37 slm. Since we expected flow to drop significantly more, we slowly turned off all
N2 to RICH until we saw the flow meter's reading go down to verify that the flow meters were not frozen or anything strange. This is the large drop to ~25 slm.</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">After restoring nitrogen flow, we performed the test again by closing off RICH's main N2 supply line. We again observed the N2 flow dropping from ~39 slm to ~37 slm.</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">Using 40 slm to calculate a conservative length of time the N2 backup system can provide flow to RICH, the calculation comes out to ~2.5 days for the 24 k-bottles used in the two N2 banks.</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">Best regards,</div>
<div class="" style="margin-top:0px; margin-bottom:0px">Tyler <span class="x_x_Apple-converted-space"> </span><br class="">
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<font class="" face="Calibri, sans-serif" style="font-size:11pt"><b class="">From:</b><span class="x_x_Apple-converted-space"> </span>Dsg-rich <<a href="mailto:dsg-rich-bounces@jlab.org" class="x_OWAAutoLink" id="LPlnk639528">dsg-rich-bounces@jlab.org</a>>
on behalf of Tyler Lemon <<a href="mailto:tlemon@jlab.org" class="x_OWAAutoLink" id="LPlnk505476">tlemon@jlab.org</a>><br class="">
<b class="">Sent:</b><span class="x_x_Apple-converted-space"> </span>Thursday, February 7, 2019 1:13:11 PM<br class="">
<b class="">To:</b><span class="x_x_Apple-converted-space"> </span>dsg-rich<br class="">
<b class="">Subject:</b><span class="x_x_Apple-converted-space"> </span>[Dsg-rich] RICH N2 backup manifold test</font>
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Hello,
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<div class="" style="direction:ltr">We need to perform a short test of the new backup manifold to see how much flow can be provided the N2 bank. </div>
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<div class="" style="direction:ltr">This will involve temporarily shutting off N2 to RICH (only for a few minutes). During this time, the hardware interlock override switch will be used to prevent N2 flow interlock from tripping off HV and LV. We will also
disable alarms for RICH N2 flow for the test to prevent any spurious alarms. </div>
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<div class="">After the test, we will know how much flow the backup system can provide to RICH and then be able to estimate how long the backup N2 banks will last.<br class="">
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<div class="" style="direction:ltr">Best regards,</div>
<div class="" style="direction:ltr">Tyler</div>
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<span id="x_x_cid:260E98A6-83BA-4E71-80A9-2A9730363C6C@fios-router.home"><RICH N2 Backup manifold test 2019-02-07.JPG></span><span class="" style="font-family:Tahoma; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none; float:none; display:inline!important">_______________________________________________</span><br class="" style="font-family:Tahoma; font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; text-align:start; text-indent:0px; text-transform:none; white-space:normal; word-spacing:0px; text-decoration:none">
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