<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
I will answer the questions inline that make sense for me to answer.
<br>
<br>
<div class="moz-cite-prefix">On 10/3/2017 8:18 AM, Tyler Lemon
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>Hello,<br>
</div>
<br>
<div>We have the following questions in regards RICH's gas
systems:<br>
</div>
<br>
<div><strong>Nitrogen Purge</strong><br>
</div>
<div>1.) How pure should the nitrogen supplied to RICH
be?<br>
</div>
<div>2.) How many ppm of water can the nitrogen supply
have?<br>
</div>
<div>3.) What is the purity of Hall B's nitrogen
boil-off?<br>
</div>
</div>
</div>
</div>
</blockquote>
99.998% N2 gas, <5 ppm O2, < 3 ppm H2O, (ppm - parts per
million)<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>4.) What is the purity of the RICH nitrogen after it
passes through the filtering on the RICH gas panel?<br>
</div>
</div>
</div>
</div>
</blockquote>
99.998% N2 gas (No Change)<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>5.) What is the procedure to swap the nitrogen
filters on the RICH gas panel?<br>
</div>
</div>
</div>
</div>
</blockquote>
It would be accomplished by qualified persons acting IAW both
manufacturer's instructions and JLAB pressure system requirements. <br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>6.) How often do we need to change the nitrogen
filters on the RICH gas panel?<br>
</div>
</div>
</div>
</div>
</blockquote>
These filters will never need changing,<br>
#1 due to their large capacity.<br>
#2 there is nothing in the "pure" gas to filter out<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>7.) How do we know that the filter is working
correctly and the nitrogen supplied to RICH is pure?<br>
</div>
</div>
</div>
</div>
</blockquote>
Filters are designed to filter and have specifications provided by
the manufacturer. These specifications are the basis of why the
filters were chosen. <br>
<br>
The LN2 gas provided by the vendor is required to meet exact
specifications. These specifications are easily achievable using the
standard air liquefaction process. The gas is monitored and
certified by the vendor to meet the standards for each truck load.
The RGA analysis is provided on the invoice from each delivery<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>8.) For a back-up nitrogen system in case we lose
supply from Hall B's main boil-off source, how can we fill
the dewar? </div>
</div>
</div>
</div>
</blockquote>
What dewar do you want to fill? Perhaps, who's dewar is a more
relevant question. One option is to purchase an additional 1500 gal
dewar to extend the time between fills.<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div> 8.1.) Could the dewar be placed outside in
an area where it could be easily filled and then have a
line run into Hall B?<br>
</div>
</div>
</div>
</div>
</blockquote>
You cannot fill a dewar unless you buy one. It is a breach of
contract to fill a vendors dewar. <br>
<br>
Once you purchase a portable dewar, it can be filled at the Hall B
fill station. But, since the Hall B dewar may be empty or damaged,
it may not be possible to fill the backup dewar.<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div> 8.2.) Would it be best to use high purity
nitrogen bottles instead of a dewar to avoid having to
refill a dewar?<br>
</div>
</div>
</div>
</div>
</blockquote>
It's a simple matter to have a supply of HP N2 gas cylinders on
hand.<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000"><br>
<div><strong>Transportation to Hall B</strong><br>
</div>
<div>9.) How will we ensure RICH aerogel does not absorb
moisture as RICH is transported to Hall B? We could set up
a high-purity nitrogen gas bottle to supply nitrogen to
RICH on its trip to Hall B.<br>
</div>
</div>
</div>
</div>
</blockquote>
I recommend covering it with 10 mil FRP sheet and sealing with duct
tape for the journey. Then, once in the hall an N2 supply could be
set up to purge it until it is installed.<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>10.) What is the purity of the nitrogen in a
high-purity nitrogen bottle?<br>
</div>
</div>
</div>
</div>
</blockquote>
There are many different purity levels available, ranging from
99.998% to 99.9999%. Cost and lead time are factors here. I
recommend sticking to what is available on the e-commerce list.<br>
UHP N2 - 99.999%, < 1 ppm O2, < 3 ppm H2O, @ $76.22 each 304
scf<br>
Industrial N2 99.998%, < 5 ppm O2, < 3 ppm H2O @ $9 each 255
scf<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>11.) What is the cost and lead time for buying
high-purity nitrogen bottles?<br>
</div>
</div>
</div>
</div>
</blockquote>
That would depend on the exact item. The lead time for the two
grades available on the e-commerce list would be 7-10 days. The
other grades would involve requesting quotes, etc, figure 6-8 weeks
lead time after the REQ gets signed.<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000"><br>
<div><strong>Air-cooling</strong><br>
</div>
<div>12.) Do we need any filtering on air supplied by the
Atlas Copco compressor?<br>
</div>
</div>
</div>
</div>
</blockquote>
No, the compressor supplies CLASS 0 air as certified I<span
class="st">SO 8573-1 <em>CLASS 0</em> (2010)<br>
For an overview of this standard, go here,
<a class="moz-txt-link-freetext" href="https://www.atlascopco.com/en-us/compressors/CustomerBenefit/Class_0_ISO_8573-1">https://www.atlascopco.com/en-us/compressors/CustomerBenefit/Class_0_ISO_8573-1</a><br>
</span><br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>13.) Could/should we install a desiccant on the gas
panel to make sure that the cooling air is dry?<br>
</div>
</div>
</div>
</div>
</blockquote>
No, a desiccant system of this capacity would not fit on the panel.
In fact, it would not fit on the forward carriage. But you could use
a moisture sensor to monitor air quality such as is used for the DC
and HTCC.<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>14.) Will we need a chiller to make the supplied
cooling air colder to increase cooling capacity?<br>
</div>
</div>
</div>
</div>
</blockquote>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>15.) Do we plan to monitor for condensation on the
air-cooling manifold?</div>
</div>
</div>
</div>
</blockquote>
No, the air cooling system utilizes ambient temperature air,
therefore, there would be no condensation and no need to monitor for
it.<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div>16.) Do we plan to install anything near the
air-cooling manifold to absorb any condensation to prevent
it dripping on the electronics?<br>
</div>
</div>
</div>
</div>
</blockquote>
What is the location of air cooling manifold you refer to? What is
the location of the electronics you refer to?<br>
<br>
<blockquote type="cite"
cite="mid:125247103.2487351.1507033116918.JavaMail.zimbra@jlab.org">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000">
<div data-marker="__QUOTED_TEXT__">
<div style="font-family: times new roman,new york,times,serif;
font-size: 12pt; color: #000000"><br>
<div>Please let us know any thoughts on the above questions.<br>
</div>
<br>
<div>Best regards,<br>
</div>
<div>Tyler</div>
</div>
<br>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Dsg-rich mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Dsg-rich@jlab.org">Dsg-rich@jlab.org</a>
<a class="moz-txt-link-freetext" href="https://mailman.jlab.org/mailman/listinfo/dsg-rich">https://mailman.jlab.org/mailman/listinfo/dsg-rich</a>
</pre>
</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>
</body>
</html>