<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
</head>
<body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">
Thank you Tyler for performing the test and let us know how long the N2 backup system will last
<div class=""><br class="">
</div>
<div class="">patrizia<br class="">
<div class="">
<div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Tahoma; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;">
--------------------------------------------------<br class="">
# Patrizia Rossi<br class="">
# Jefferson Lab <br class="">
# 12000 Jefferson Avenue<br class="">
# Suite 5<br class="">
# Newport News VA 23606 (USA)<br class="">
# <a href="mailto:rossi@jlab.org" class="">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="">
<br class="">
</div>
<div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Tahoma; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<br class="">
</div>
<br class="Apple-interchange-newline">
</div>
<div><br class="">
<blockquote type="cite" class="">
<div class="">On 7 Feb 2019, at 13:58, Tyler Lemon <<a href="mailto:tlemon@jlab.org" class="">tlemon@jlab.org</a>> wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div id="divtagdefaultwrapper" dir="ltr" style="caret-color: rgb(0, 0, 0); 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; -webkit-text-stroke-width: 0px; text-decoration: none; font-size: 12pt; font-family: Calibri, Helvetica, sans-serif;" class="">
<div style="margin-top: 0px; margin-bottom: 0px;" class="">Hello,</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">The test is complete, the override switch is off and alarms have been re-enabled.</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">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>
<div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">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>
<div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">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>
<div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">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>
<div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class="">
</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">Best regards,</div>
<div style="margin-top: 0px; margin-bottom: 0px;" class="">Tyler <span class="Apple-converted-space"> </span><br class="">
</div>
</div>
<hr tabindex="-1" style="caret-color: rgb(0, 0, 0); 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; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline-block; width: 880.03125px;" class="">
<span style="caret-color: rgb(0, 0, 0); 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; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class=""></span>
<div id="divRplyFwdMsg" dir="ltr" style="caret-color: rgb(0, 0, 0); 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; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">From:</b><span class="Apple-converted-space"> </span>Dsg-rich <<a href="mailto:dsg-rich-bounces@jlab.org" class="">dsg-rich-bounces@jlab.org</a>> on behalf of Tyler Lemon <<a href="mailto:tlemon@jlab.org" class="">tlemon@jlab.org</a>><br class="">
<b class="">Sent:</b><span class="Apple-converted-space"> </span>Thursday, February 7, 2019 1:13:11 PM<br class="">
<b class="">To:</b><span class="Apple-converted-space"> </span>dsg-rich<br class="">
<b class="">Subject:</b><span class="Apple-converted-space"> </span>[Dsg-rich] RICH N2 backup manifold test</font>
<div class=""> </div>
</div>
<div dir="ltr" style="caret-color: rgb(0, 0, 0); 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; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<div id="x_divtagdefaultwrapper" dir="ltr" style="font-size: 12pt; font-family: Calibri, Helvetica, sans-serif;" class="">
Hello,
<div class=""><br class="">
</div>
<div style="direction: ltr;" class="">We need to perform a short test of the new backup manifold to see how much flow can be provided the N2 bank. </div>
<div class=""><br class="">
</div>
<div style="direction: ltr;" class="">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>
<div class=""><br class="">
</div>
<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="">
</div>
<div class=""><br class="">
</div>
<div style="direction: ltr;" class="">Best regards,</div>
<div style="direction: ltr;" class="">Tyler</div>
</div>
</div>
<span id="cid:260E98A6-83BA-4E71-80A9-2A9730363C6C@fios-router.home"><RICH N2 Backup manifold test 2019-02-07.JPG></span><span style="caret-color: rgb(0, 0, 0); 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; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); 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; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<span style="caret-color: rgb(0, 0, 0); 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; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Dsg-rich
mailing list</span><br style="caret-color: rgb(0, 0, 0); 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; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<a href="mailto:Dsg-rich@jlab.org" style="font-family: Tahoma; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">Dsg-rich@jlab.org</a><br style="caret-color: rgb(0, 0, 0); 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; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">
<a href="https://mailman.jlab.org/mailman/listinfo/dsg-rich" style="font-family: Tahoma; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">https://mailman.jlab.org/mailman/listinfo/dsg-rich</a></div>
</blockquote>
</div>
<br class="">
</div>
</body>
</html>