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<p>Hi Valery,</p>
<p>George and I are discussing the questions and we will try to
answer or at least point out the appropriate Hall B staff to help
out. The answers are inline.</p>
<p>Thanks <br>
</p>
<p>Marc<br>
</p>
<br>
<div class="moz-cite-prefix">On 11/1/2016 2:23 PM, Valery Kubarovsky
wrote:<br>
</div>
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<div>Dear George and Marc,</div>
<div><br data-mce-bogus="1">
</div>
<div>I submitted OSP for the RICH12 operation. It includes gas
cooling system and nitrogen purge system that you designed. </div>
<div><br data-mce-bogus="1">
</div>
<div><a class="moz-txt-link-freetext" href="https://mis.jlab.org/mis/apps/mis_forms/operational_safety_procedure_form.cfm?ENTRY_ID=63644&approvalVersion=2">https://mis.jlab.org/mis/apps/mis_forms/operational_safety_procedure_form.cfm?ENTRY_ID=63644&approvalVersion=2</a></div>
<div><br data-mce-bogus="1">
</div>
<div>I got a couple of questions from Timothy Whitlatch, who is
reviewing this OSP. Please, send me the replies to all his
questions.</div>
<div><br data-mce-bogus="1">
</div>
<div>Thanks,</div>
<div>Valery</div>
<div><br data-mce-bogus="1">
</div>
<div><br data-mce-bogus="1">
</div>
<div><br>
</div>
<hr id="zwchr" data-marker="__DIVIDER__">
<div data-marker="__HEADERS__"><b>From: </b>"Timothy Whitlatch"
<a class="moz-txt-link-rfc2396E" href="mailto:whitey@jlab.org"><whitey@jlab.org></a><br>
<b>To: </b>"Valery Kubarovsky" <a class="moz-txt-link-rfc2396E" href="mailto:vpk@jlab.org"><vpk@jlab.org></a><br>
<b>Cc: </b>"Will Oren" <a class="moz-txt-link-rfc2396E" href="mailto:oren@jlab.org"><oren@jlab.org></a>, "Bert Manzlak"
<a class="moz-txt-link-rfc2396E" href="mailto:manzlak@jlab.org"><manzlak@jlab.org></a><br>
<b>Sent: </b>Tuesday, November 1, 2016 11:47:35 AM<br>
<b>Subject: </b>OSP for CLAS 12 RICH<br>
</div>
<div><br>
</div>
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<div>Good Morning Valery,<br>
</div>
<br>
<div>I have been looking over your OSP in order to provide
Pressure Systems approval.<br>
</div>
<br>
<div><a class="moz-txt-link-freetext" href="https://mis.jlab.org/mis/apps/mis_forms/operational_safety_procedure_form.cfm?ENTRY_ID=63644&approvalVersion=2">https://mis.jlab.org/mis/apps/mis_forms/operational_safety_procedure_form.cfm?ENTRY_ID=63644&approvalVersion=2</a></div>
<br>
<div>I have a few questions;<br>
</div>
<br>
<div>There are 2 pressure systems, air and nitrogen.<br>
</div>
<br>
<div>Are there associated JLAB pressure system numbers
assigned to these systems?<br>
</div>
</div>
</div>
</div>
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<div>Who is the JLAB DA (Design Authority) for each of these
systems?<br>
</div>
</div>
</div>
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</blockquote>
Saptarshi Mandal worked on the ASME documentation for the RICH. He
may be able to answer both of the first two questions.<br>
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<div>Are there associated personnel hazards with these
systems? (nothing indicated on the THA form).<br>
</div>
</div>
</div>
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Tyler Lemon is the DSG point of contact for the RICH interlocks, he
can assist you with any info on the interlock information. That is
with the exception of the RICH gas controls interface chassis. <br>
<br>
This is a chassis which is being assembled by the DSG, it contains
two power supplies (24VDC and +/- 15V) which are used to provide
power for the mass flow transducers, humidity and temperature
sensors. It also provides an interconnect for the sensors and
transducers to the RICH Interlocks cRIO. The chassis has circuit
protection fuses, is grounded, and the power supplies are completely
enclosed to eliminate any electrical shock hazards.<br>
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<div>Are there hazards associated with entering the
enclosure with the air cooling system on?<br>
</div>
</div>
</div>
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You may want to ask Bob Miller this question.<br>
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<div>Is there an ODH hazard in the hall due to the nitrogen
system?<br>
</div>
</div>
</div>
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Although the nitrogen in the system is a relatively small amount,
Bob Miller would have to provide the answer this question...as all
Hall Gas systems have to be considered in an ODH calculation.<br>
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<div>Are there detailed procedures for operating the
nitrogen and air systems?<br>
</div>
</div>
</div>
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</blockquote>
DSG will be providing software to control turning the compressors on
and off remotely, additionally there will be a local method. Once
defined, DSG will provide documentation and training to the Hall B
staff responsible for daily operation of the detector and any after
hours on-call support. Once on, the gas operation will not be
controlled by any instrumentation such as a mass flow controller,
the system is set up to always flow gas/air as long as everything is
in working order.<br>
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<div>Section 4.2 on the OSP procedure form states that the
individuals approved for the operations are listed on the
attached document. I do not see this list attached.<br>
</div>
</div>
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This is another Hall B decision, they would be providing daily
operations/on-call support. Bob may be able to give you a list.<br>
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<div>In Section 4.4, is there equipment specific training
required? Is pressure system awareness training (SAF130A)
required for people operating the air and nitrogen
systems?<br>
</div>
</div>
</div>
</div>
</blockquote>
Again, Saptarshi provided the documentation on the relief valves and
any other ASME pressure numbers. The piping and valve equipment is
all standard, we do not perceive any necessary adjustments to valves
once they are set. The tank is above the 15PSI limit and is
considered a pressure system, but there are engineer specified
relief valves in the design and there are no welds. Saptarshi can
probably give you more specifics, if you need them.<br>
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<div>There are several "TBD"s for threshold values. Have
these been determined?<br>
</div>
</div>
</div>
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The system is in early development. The tank regulator settings have
not been determined yet as they are directly related to the desired
temperature of the electronics.<br>
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<br>
<br>
<div>Thank you,<br>
</div>
<br>
<div>Tim Whitlatch<br>
Hall D Engineer<br>
Jefferson Lab<br>
600 KELVIN DR STE 5<br>
Newport News, VA 23606-4468 <br>
757-269-5087</div>
</div>
<br>
</div>
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<br>
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<pre wrap="">_______________________________________________
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Marc McMullen
Detector Support Group
757-269-7738</pre>
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