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I plan on replacing the 50 psi relief valve with a 15 psi relief.
Then we will set the pressure regulator to 10 psi instead of 15 psi.
I plan on making this change to all the new N2 purge systems hall
B.<br>
<br>
This is to exempt these systems IAW chapter 6151 of the ES&H
manual.<br>
<br>
George<br>
<br>
<div class="moz-cite-prefix">On 11/21/2016 7:37 AM, Marc McMullen
wrote:<br>
</div>
<blockquote
cite="mid:1893748327.694028.1479731846962.JavaMail.zimbra@jlab.org"
type="cite">
<div style="font-family: arial, helvetica, sans-serif; font-size:
12pt; color: #000000">
<div>Thanks Dave,</div>
<div><br data-mce-bogus="1">
</div>
<div>Perhaps you and I should meet with George, you can then go
into detail about what parts may need changing. If you have a
time that is good for you, let us know.</div>
<div><br>
</div>
<div data-marker="__SIG_PRE__">Marc McMullen<br>
Physics Division<br>
Detector Support Group<br>
7738</div>
<div><br>
</div>
<hr id="zwchr" data-marker="__DIVIDER__">
<div data-marker="__HEADERS__"><b>From: </b>"David Meekins"
<a class="moz-txt-link-rfc2396E" href="mailto:meekins@jlab.org"><meekins@jlab.org></a><br>
<b>To: </b>"Marc McMullen" <a class="moz-txt-link-rfc2396E" href="mailto:mcmullen@jlab.org"><mcmullen@jlab.org></a><br>
<b>Sent: </b>Sunday, November 20, 2016 3:13:22 PM<br>
<b>Subject: </b>Re: RICH Pressure calculations<br>
</div>
<div><br>
</div>
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: arial,helvetica,sans-serif;
font-size: 14pt; color: #000000"
data-mce-style="font-family: arial,helvetica,sans-serif;
font-size: 14pt; color: #000000;">
<div>Hi Marc,</div>
<br>
<div>It seems that Patrizia is away from the lab. I do not
have an estimate for the time this will take but it will
be significant. I am working on it nights and weekends to
make it happen. I don't know if I will make the December
review though. This system will have to be tested and
inspected which will not be a trivial thing. Please note
that the mixed materials in the Swagelok fittings are not
in compliance with manufacturer's catalog/manuals and may
have to be replaced with brass ferrules and copper tubing.</div>
<br>
<div>David Meekins<br>
Staff Scientist<br>
Thomas Jefferson National Accelerator Facility<br>
12000 Jefferson Ave<br>
Newport News Va. 23606<br>
<br>
Office: 757-269-5434<br>
Cell: 757-968-9076</div>
<br>
<hr id="zwchr">
<div><b>From: </b>"Marc McMullen" <a class="moz-txt-link-rfc2396E" href="mailto:mcmullen@jlab.org"><mcmullen@jlab.org></a><br>
<b>To: </b>"David Meekins" <a class="moz-txt-link-rfc2396E" href="mailto:meekins@jlab.org"><meekins@jlab.org></a><br>
<b>Cc: </b><a class="moz-txt-link-abbreviated" href="mailto:dsg-rich@jlab.org">dsg-rich@jlab.org</a><br>
<b>Sent: </b>Wednesday, November 16, 2016 2:20:02 PM<br>
<b>Subject: </b>Re: RICH Pressure calculations<br>
</div>
<br>
<div>Hi Dave, Have you had a chance to communicate with
Patrizia on the RICH design authority work? DSG management
is trying to prepare scheduling for the near future, so if
you have an estimate on the time required. That would
provide some valuable information. Thanks, Marc McMullen
Physics Division Detector Support Group 7738 -----
Original Message ----- From: David Meekins To: Marc
McMullen Sent: Mon, 14 Nov 2016 12:02:46 -0500 (EST)
Subject: Re: RICH Pressure calculations Hi Mark, Are you
available today to talk about this. I don't have any
information regarding this system. Thanks David Meekins
Staff Scientist Thomas Jefferson National Accelerator
Facility 12000 Jefferson Ave Newport News Va. 23606
Office: 757-269-5434 Cell: 757-968-9076 From: "Marc
McMullen" To: <a class="moz-txt-link-abbreviated" href="mailto:dsg-rich@jlab.org">dsg-rich@jlab.org</a>, "David Meekins" Sent:
Monday, November 14, 2016 8:57:33 AM Subject: RICH
Pressure calculations Good Morning Dave, Patrizia has
informed the DSG that you will be working on the RICH
pressure calculations. George says he has sent you
information needed to make the calculations. Please let us
know if there is something we can do to help expedite the
process. Thanks, -- Marc McMullen Detector Support Group
757-269-7738</div>
</div>
<br>
</div>
</div>
<br>
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<br>
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</blockquote>
<br>
<pre class="moz-signature" cols="72">--
George Jacobs
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606
(office) 757-269-7115
(cell) 757-876-0480
(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org">jacobsg@jlab.org</a>
(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/~jacobsg">https://userweb.jlab.org/~jacobsg</a></pre>
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