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<p style="margin-top:0;margin-bottom:0">Hello Bob,</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">As George mentioned in his email from 1/10, the nitrogen back up manifold for RICH is ready to be installed on the existing N2 panel on top of the FC. I have it at my desk and it can be picked up any time for installation.</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">The 12-bottle nitrogen bank that will act as the back-up supply is expected to arrive around Feb 5, 2019. For the backup manifold to be installed without the backup supply, it would need a valve to prevent
<span>regular N2</span> back flow out of the connection point for the back-up supply.</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">Also, once the back-up N2 bank arrives, Hall B will have to determine the best place for it to be located and how to best run a line from it to the back-up manifold on the top deck of the FC.</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">Best regards,</p>
<p style="margin-top:0;margin-bottom:0">Tyler<br>
</p>
</div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Dsg-rich <dsg-rich-bounces@jlab.org> on behalf of George Jacobs <jacobsg@jlab.org><br>
<b>Sent:</b> Thursday, January 10, 2019 10:12:45 AM<br>
<b>To:</b> Bill Crahen<br>
<b>Cc:</b> dsg-rich; David Kashy; Bob Miller<br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 system automatic backup</font>
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<p style="margin-top:0; margin-bottom:0">Hi Bill,</p>
<p style="margin-top:0; margin-bottom:0"><br>
</p>
<p style="margin-top:0; margin-bottom:0">I moved RV1 to just downstream of the 0-60 psi back up supply PR in the P&I as you suggested. See attached P&I diagram</p>
<p style="margin-top:0; margin-bottom:0"><br>
</p>
<p style="margin-top:0; margin-bottom:0">We have successfully tested for proper pnuematic valve operation. The equipment is now labeled and ready to install.</p>
<p style="margin-top:0; margin-bottom:0"><br>
</p>
<p style="margin-top:0; margin-bottom:0">Thanks,</p>
<p style="margin-top:0; margin-bottom:0">George<br>
</p>
<p style="margin-top:0; margin-bottom:0"><br>
</p>
<div id="x_Signature">
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<p style="margin-top:0; margin-bottom:0"><span id="x_ms-rterangepaste-start"></span></p>
<div>-- <br>
George Jacobs<br>
Jefferson Lab (TJNAF)<br>
STE 12<br>
12000 Jefferson Ave.<br>
Newport News, VA 23606<br>
<br>
(office) 757-269-7021<br>
<br>
(cell) 757-876-0480<br>
<br>
(email) jacobsg@jlab.org<br>
<br>
(website) https://userweb.jlab.org/~jacobsg</div>
<span id="x_ms-rterangepaste-end"></span><br>
<p></p>
</div>
</div>
<br>
<br>
<div style="color:rgb(0,0,0)">
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> William Crahen <wcrahen@jlab.org><br>
<b>Sent:</b> Tuesday, January 8, 2019 1:29 PM<br>
<b>To:</b> George Jacobs<br>
<b>Cc:</b> Bob Miller; David Kashy<br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 system automatic backup</font>
<div> </div>
</div>
<div style="background-color:#FFFFFF">
<p>The new arrangement is okay and the relief valve is properly sized. You can go ahead and test your desktop arrangement, with a couple of additional comments- if the relief is at the panel as indicated, you need to keep an eye on the length of 1/2" Nylotube-
keep it at 100' or less. The reason is pressure drop at the relieving condition-you may have 75 x 1.1=82.5 psig at the panel, but the other end of the tube will be at a pressure =82.5 + pipe loss value. You should consider moving the relief to the supply end
of things.<br>
</p>
<div class="x_x_moz-cite-prefix">On 1/7/2019 2:06 PM, George Jacobs wrote:<br>
</div>
<blockquote type="cite">
<div id="x_x_divtagdefaultwrapper" dir="ltr">
<div id="x_x_divtagdefaultwrapper" dir="ltr">
<p>Hi Bill,</p>
<p><br>
</p>
<p>I have moved the relief valve as requested and added a size 47 Okeefe orifice on the high pressure side of the back up supply pressure regulator. I have added the orifice to the P&I diagram and componenets spreadsheet. See attachments.</p>
<p><br>
</p>
<p>The line length for the backup supply will depend on where Hall B decides to locate the back up supply gas bottles. A back up supply flow of 20 slm per detector volume, 40 slm total, is the target back up flow.<br>
</p>
<p><br>
</p>
Thanks,</div>
<div dir="ltr">George<br>
<p><br>
</p>
<div id="x_x_Signature">
<meta content="text/html; charset=UTF-8">
<div id="x_x_divtagdefaultwrapper" dir="ltr">
<p><span id="x_x_ms-rterangepaste-start"></span></p>
<div>-- <br>
George Jacobs<br>
Jefferson Lab (TJNAF)<br>
STE 12<br>
12000 Jefferson Ave.<br>
Newport News, VA 23606<br>
<br>
(office) 757-269-7021<br>
<br>
(cell) 757-876-0480<br>
<br>
(email) <a class="x_x_moz-txt-link-abbreviated x_OWAAutoLink" href="mailto:jacobsg@jlab.org" id="LPlnk995507">
jacobsg@jlab.org</a><br>
<br>
(website) <a class="x_x_moz-txt-link-freetext x_OWAAutoLink" href="https://userweb.jlab.org/~jacobsg" id="LPlnk802255">
https://userweb.jlab.org/~jacobsg</a></div>
<span id="x_x_ms-rterangepaste-end"></span><br>
</div>
</div>
<br>
<br>
<div>
<hr tabindex="-1">
<div id="x_x_divRplyFwdMsg" dir="ltr"><b>From:</b> William Crahen <a class="x_x_moz-txt-link-rfc2396E x_OWAAutoLink" href="mailto:wcrahen@jlab.org" id="LPlnk698677">
<wcrahen@jlab.org></a><br>
<b>Sent:</b> Friday, January 4, 2019 4:19 PM<br>
<b>To:</b> George Jacobs<br>
<b>Cc:</b> Bob Miller; David Kashy<br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 system automatic backup
<div> </div>
</div>
<div>
<p>George, before we do that, please see the attached. We need to relocate RV1 so that it can protect both PV1 and PT3- RV1 serves no purpose in it's current location with respect to the Dewar supply, as that is already limited by the 65 psig reliefs installed
on the dewar. The credible high pressure scenario is failure of the N2 cyl bank regulator, which could dump 3000 psi into the nylon line leading to PT3. If RV1 is relocated as indicated and an orifice is installed on the cylinder bank regulator (which I am
assuming is in the plans) then sizing the orifice and including pipe pressure loss to RV1 for a flow of 70 SCFM or less will protect the components.<br>
</p>
<div class="x_x_x_moz-cite-prefix">On 1/4/2019 2:32 PM, George Jacobs wrote:<br>
</div>
<blockquote type="cite">
<div id="x_x_x_divtagdefaultwrapper" dir="ltr">
<p>Hi William,</p>
<p><br>
</p>
<p>Can you give the DSG an estimate on when the back up N2 supply will be ready for testing and installation in Hall B?</p>
<p><br>
</p>
<p>Thanks,</p>
<p>George<br>
</p>
<p><br>
</p>
<div id="x_x_x_Signature">
<meta content="text/html; charset=UTF-8">
<div id="x_x_x_divtagdefaultwrapper" dir="ltr">
<p><span id="x_x_x_ms-rterangepaste-start"></span></p>
<div>-- <br>
George Jacobs<br>
Jefferson Lab (TJNAF)<br>
STE 12<br>
12000 Jefferson Ave.<br>
Newport News, VA 23606<br>
<br>
(office) 757-269-7021<br>
<br>
(cell) 757-876-0480<br>
<br>
(email) <a class="x_x_x_moz-txt-link-abbreviated x_x_OWAAutoLink" href="mailto:jacobsg@jlab.org" id="LPlnk903663">
jacobsg@jlab.org</a><br>
<br>
(website) <a class="x_x_x_moz-txt-link-freetext x_x_OWAAutoLink" href="https://userweb.jlab.org/~jacobsg" id="LPlnk111494">
https://userweb.jlab.org/~jacobsg</a></div>
<span id="x_x_x_ms-rterangepaste-end"></span><br>
</div>
</div>
<br>
<br>
<div>
<hr tabindex="-1">
<div id="x_x_x_divRplyFwdMsg" dir="ltr"><b>From:</b> Dsg-rich <a class="x_x_x_moz-txt-link-rfc2396E x_x_OWAAutoLink" href="mailto:dsg-rich-bounces@jlab.org" id="LPlnk979335">
<dsg-rich-bounces@jlab.org></a> on behalf of George Jacobs <a class="x_x_x_moz-txt-link-rfc2396E x_x_OWAAutoLink" href="mailto:jacobsg@jlab.org" id="LPlnk811407">
<jacobsg@jlab.org></a><br>
<b>Sent:</b> Monday, December 17, 2018 4:56 PM<br>
<b>To:</b> Bill Crahen; Tyler Lemon; Bob Miller; dsg-rich<br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 system automatic backup
<div> </div>
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<div dir="ltr">
<div id="x_x_x_x_divtagdefaultwrapper" dir="ltr">
<p>Hi William,</p>
<p><br>
</p>
<p>Please find attached files; updated and expanded components list, updated P&I diagram, and annotated pic of assembly (for ref)</p>
<p><br>
</p>
<p>Please let me know if you need any additional info.</p>
<p><br>
</p>
<p>Happy Holidays!<br>
</p>
<p><br>
</p>
<div id="x_x_x_x_Signature">
<meta content="text/html; charset=UTF-8">
<div id="x_x_x_x_divtagdefaultwrapper" dir="ltr">
<p><span id="x_x_x_x_ms-rterangepaste-start"></span></p>
<div>-- <br>
George Jacobs<br>
Jefferson Lab (TJNAF)<br>
STE 12<br>
12000 Jefferson Ave.<br>
Newport News, VA 23606<br>
<br>
(office) 757-269-7021<br>
<br>
(cell) 757-876-0480<br>
<br>
(email) <a class="x_x_x_moz-txt-link-abbreviated x_x_OWAAutoLink" href="mailto:jacobsg@jlab.org" id="LPlnk185056">
jacobsg@jlab.org</a><br>
<br>
(website) <a class="x_x_x_moz-txt-link-freetext x_x_OWAAutoLink" href="https://userweb.jlab.org/~jacobsg" id="LPlnk781131">
https://userweb.jlab.org/~jacobsg</a></div>
<span id="x_x_x_x_ms-rterangepaste-end"></span><br>
</div>
</div>
<br>
<br>
<div>
<hr tabindex="-1">
<div id="x_x_x_x_divRplyFwdMsg" dir="ltr"><b>From:</b> William Crahen <a class="x_x_x_moz-txt-link-rfc2396E x_x_OWAAutoLink" href="mailto:wcrahen@jlab.org" id="LPlnk591512">
<wcrahen@jlab.org></a><br>
<b>Sent:</b> Friday, December 14, 2018 2:43 PM<br>
<b>To:</b> George Jacobs; Tyler Lemon; Bob Miller; dsg-rich<br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 system automatic backup
<div> </div>
</div>
<div>
<p>George, I need more information about this system- please provide the following:</p>
<p>indicate line sizes and material on the diagram. I also need the corresponding attachment fittings information, manufacturer and part number. If the tubing is plastic, part numbers for the tube inserts if required by the manufacturer. The same information
is needed on the parts list you provided- some are listing manufacturer info (Grainger is a distributor, not a manufacturer).<br>
</p>
<p>there is a relief valve on this system- where is the sizing calculation?</p>
<p>what is the pressure system number associated with this system?</p>
<p>where is this system physically located?</p>
<p>Are there actual mechanical drawings of this system?<br>
</p>
<p><br>
</p>
<div class="x_x_x_x_x_moz-cite-prefix">On 12/14/2018 1:18 PM, George Jacobs wrote:<br>
</div>
<blockquote type="cite">
<div id="x_x_x_x_x_divtagdefaultwrapper" dir="ltr">
<p>Please find attached files for the RICH N2 purge back-up supply.<br>
</p>
<p><br>
</p>
<div id="x_x_x_x_x_Signature">
<meta content="text/html;
charset=UTF-8">
<div id="x_x_x_x_x_divtagdefaultwrapper" dir="ltr">
<p><span id="x_x_x_x_x_ms-rterangepaste-start"></span></p>
<div>-- <br>
George Jacobs<br>
Jefferson Lab (TJNAF)<br>
STE 12<br>
12000 Jefferson Ave.<br>
Newport News, VA 23606<br>
<br>
(office) 757-269-7021<br>
<br>
(cell) 757-876-0480<br>
<br>
(email) <a class="x_x_x_x_x_moz-txt-link-abbreviated x_x_x_x_OWAAutoLink" href="mailto:jacobsg@jlab.org" id="LPlnk785596">
jacobsg@jlab.org</a><br>
<br>
(website) <a class="x_x_x_x_x_moz-txt-link-freetext x_x_x_x_OWAAutoLink" href="https://userweb.jlab.org/~jacobsg" id="LPlnk897214">
https://userweb.jlab.org/~jacobsg</a></div>
<span id="x_x_x_x_x_ms-rterangepaste-end"></span><br>
</div>
</div>
<br>
<br>
<div>
<hr tabindex="-1">
<div id="x_x_x_x_x_divRplyFwdMsg" dir="ltr"><b>From:</b> Dsg-rich <a class="x_x_x_x_x_moz-txt-link-rfc2396E x_x_x_x_OWAAutoLink" href="mailto:dsg-rich-bounces@jlab.org" id="LPlnk944441">
<dsg-rich-bounces@jlab.org></a> on behalf of Tyler Lemon <a class="x_x_x_x_x_moz-txt-link-rfc2396E x_x_x_x_OWAAutoLink" href="mailto:tlemon@jlab.org" id="LPlnk566255">
<tlemon@jlab.org></a><br>
<b>Sent:</b> Friday, December 14, 2018 12:40 PM<br>
<b>To:</b> Bob Miller; Bill Crahen; dsg-rich<br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 system automatic backup
<div> </div>
</div>
<div dir="ltr">
<div id="x_x_x_x_x_x_divtagdefaultwrapper" dir="ltr">
<p>Hello George,</p>
<p><br>
</p>
<p>Can you send Bob Miller and Bill Crahen the drawing, pressure systems numbers and any other documentation you have on the RICH N2 automatic back up?</p>
<p><br>
</p>
<p>Bill will be the DA for it.<br>
</p>
<p><br>
</p>
<p><br>
</p>
<p>Best regards,</p>
<p>Tyler<br>
</p>
<br>
<br>
<div>
<hr tabindex="-1">
<div id="x_x_x_x_x_x_divRplyFwdMsg" dir="ltr"><b>From:</b> Bob Miller <a class="x_x_x_x_x_moz-txt-link-rfc2396E x_x_x_x_OWAAutoLink" href="mailto:rmiller@jlab.org" id="LPlnk81985">
<rmiller@jlab.org></a><br>
<b>Sent:</b> Friday, December 14, 2018 9:25 AM<br>
<b>To:</b> Tyler Lemon<br>
<b>Cc:</b> Bill Crahen; Amrit Yegneswaran<br>
<b>Subject:</b> Fwd: Re: [Dsg-rich] RICH N2 system automatic backup
<div> </div>
</div>
<div>
<p>Hi Tyler,</p>
<p><br>
</p>
<p>Please send the drawings, pressure systems number, and whatever documentation you have to Bill Crahen and myself.</p>
<p><br>
</p>
<p>Bill will be the DA on this project.</p>
<p><br>
</p>
<p>Regards,</p>
<p>Bob<br>
</p>
<div class="x_x_x_x_x_x_x_moz-forward-container"><br>
<br>
-------- Forwarded Message --------
<table class="x_x_x_x_x_x_x_moz-email-headers-table">
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<tr>
<th nowrap="nowrap">Subject: </th>
<td>Re: [Dsg-rich] RICH N2 system automatic backup</td>
</tr>
<tr>
<th nowrap="nowrap">Date: </th>
<td>Wed, 12 Dec 2018 19:39:33 -0500</td>
</tr>
<tr>
<th nowrap="nowrap">From: </th>
<td>Amrit Yegneswaran <a class="x_x_x_x_x_x_x_moz-txt-link-rfc2396E x_x_x_x_x_x_OWAAutoLink" href="mailto:yeg@jlab.org" id="LPlnk406820">
<yeg@jlab.org></a></td>
</tr>
<tr>
<th nowrap="nowrap">To: </th>
<td>Marco Contalbrigo <a class="x_x_x_x_x_x_x_moz-txt-link-rfc2396E x_x_x_x_x_x_OWAAutoLink" href="mailto:mcontalb@fe.infn.it" id="LPlnk22469">
<mcontalb@fe.infn.it></a>, Patrizia Rossi <a class="x_x_x_x_x_x_x_moz-txt-link-rfc2396E x_x_x_x_x_x_OWAAutoLink" href="mailto:rossi@jlab.org" id="LPlnk718032">
<rossi@jlab.org></a>, Bob Miller <a class="x_x_x_x_x_x_x_moz-txt-link-rfc2396E x_x_x_x_x_x_OWAAutoLink" href="mailto:rmiller@jlab.org" id="LPlnk5137">
<rmiller@jlab.org></a></td>
</tr>
<tr>
<th nowrap="nowrap">CC: </th>
<td>dsg-rich <a class="x_x_x_x_x_x_x_moz-txt-link-rfc2396E x_x_x_x_x_x_OWAAutoLink" href="mailto:dsg-rich@jlab.org" id="LPlnk700658">
<dsg-rich@jlab.org></a></td>
</tr>
</tbody>
</table>
<br>
<br>
<div id="x_x_x_x_x_x_x_divtagdefaultwrapper" dir="ltr">
<p>bob,</p>
<p>please assign a design authority for the analysis and approval of the system.</p>
<p>thanks <br>
</p>
<p>amrit<br>
</p>
<br>
<br>
<div>
<hr tabindex="-1">
<div id="x_x_x_x_x_x_x_divRplyFwdMsg" dir="ltr"><b>From:</b> Dsg-rich <a class="x_x_x_x_x_x_x_moz-txt-link-rfc2396E x_x_x_x_x_x_OWAAutoLink" href="mailto:dsg-rich-bounces@jlab.org" id="LPlnk967199">
<dsg-rich-bounces@jlab.org></a> on behalf of Marco Contalbrigo <a class="x_x_x_x_x_x_x_moz-txt-link-rfc2396E x_x_x_x_x_x_OWAAutoLink" href="mailto:mcontalb@fe.infn.it" id="LPlnk455803">
<mcontalb@fe.infn.it></a><br>
<b>Sent:</b> Wednesday, December 12, 2018 3:33 PM<br>
<b>To:</b> Patrizia Rossi<br>
<b>Cc:</b> dsg-rich<br>
<b>Subject:</b> Re: [Dsg-rich] RICH N2 system automatic backup
<div> </div>
</div>
<div class="x_x_x_x_x_x_x_BodyFragment"><span>
<div class="x_x_x_x_x_x_x_PlainText">Dear Tyler,<br>
thank to DSG for this nice upgrade!<br>
Marco.<br>
<br>
On Wed, 12 Dec 2018, Patrizia Rossi wrote:<br>
<br>
> Very appreciated Christmas gift!! Thank you Tyler and DSG people!!<br>
> Patrizia <br>
> <br>
> Sent from my iPhone<br>
> <br>
> On Dec 12, 2018, at 3:13 PM, Tyler Lemon <a class="x_x_x_x_x_x_x_moz-txt-link-rfc2396E x_x_x_x_x_x_OWAAutoLink" href="mailto:tlemon@jlab.org" id="LPlnk671870">
<tlemon@jlab.org></a> wrote:<br>
><br>
> Hello,<br>
> <br>
><br>
> DSG has developed a system to automatically switch RICH to a back up<br>
> bank of nitrogen in the event that Hall B's main nitrogen supply is<br>
> stopped.<br>
> <br>
><br>
> The system is designed to use a pneumatic valve operated using the<br>
><br>
> pressure from the main N2 supply line that will open if that supply<br>
> pressure drops. The open pneumatic valve will then allow N2 to flow to<br>
> RICH from a bank of nitrogen bottles. Attached is a revised RICH<br>
> nitrogen system diagram showing the new automatic switch-over<br>
> components.<br>
> <br>
><br>
> George has assembled the new components and DSG would like to test them<br>
> at the beginning of next year after the holidays. To be able to do any<br>
> sort of testing, the components and test procedure will need to undergo<br>
> a pressure systems analysis by a Design Authority (DA).<br>
> <br>
><br>
> DSG will provide the necessary documentation to the DA once one is<br>
> requested and assigned.<br>
> <br>
><br>
> Best regards,<br>
><br>
> Tyler<br>
><br>
> <RICH-N2-valve panel-REV2..pdf><br>
><br>
> _______________________________________________<br>
> Dsg-rich mailing list<br>
> <a class="x_x_x_x_x_x_x_moz-txt-link-abbreviated x_x_x_x_x_x_OWAAutoLink" href="mailto:Dsg-rich@jlab.org" id="LPlnk157114">
Dsg-rich@jlab.org</a><br>
> <a href="https://mailman.jlab.org/mailman/listinfo/dsg-rich" id="LPlnk405477" class="x_x_x_x_x_x_x_OWAAutoLink">
https://mailman.jlab.org/mailman/listinfo/dsg-rich</a>
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<div id="LPTitle_15446615018710.8010548356177534"><a id="LPUrlAnchor_15446615018720.4533420414911362" href="https://mailman.jlab.org/mailman/listinfo/dsg-rich" target="_blank">Dsg-rich Info Page</a></div>
<div id="LPMetadata_15446615018720.6502693213462405">mailman.jlab.org</div>
<div id="LPDescription_15446615018720.8376964516236814">Mailing list for Hall B RICH. Members of mailing list are DSG, INFN collaborators, and other JLab staff associated with RICH. To see the collection of prior postings to the list, visit the Dsg-rich Archives..
Using Dsg-rich</div>
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