[Dsg-rich] RICH N2 system automatic backup

William Crahen wcrahen at jlab.org
Thu Jan 10 13:52:47 EST 2019 

That is great- the system is safer in that configuration. If your test 
apparatus works as intended, let Bob and I  know when this is ready to 
be installed in the hall. Bob, will Morgan be doing this work?

On 1/10/2019 10:12 AM, George Jacobs wrote:
>
> Hi Bill,
>
>
> 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
>
>
> We have successfully tested for proper pnuematic valve operation. The 
> equipment is now labeled and ready to install.
>
>
> Thanks,
>
> George
>
>
> -- 
> George Jacobs
> Jefferson Lab (TJNAF)
> STE 12
> 12000 Jefferson Ave.
> Newport News, VA 23606
>
> (office) 757-269-7021
>
> (cell)   757-876-0480
>
> (email) jacobsg at jlab.org
>
> (website) https://userweb.jlab.org/~jacobsg
>
>
>
> ------------------------------------------------------------------------
> *From:* William Crahen <wcrahen at jlab.org>
> *Sent:* Tuesday, January 8, 2019 1:29 PM
> *To:* George Jacobs
> *Cc:* Bob Miller; David Kashy
> *Subject:* Re: [Dsg-rich] RICH N2 system automatic backup
>
> 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.
>
> On 1/7/2019 2:06 PM, George Jacobs wrote:
>>
>> Hi Bill,
>>
>>
>> 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.
>>
>>
>> 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.
>>
>>
>> Thanks,
>> George
>>
>>
>> -- 
>> George Jacobs
>> Jefferson Lab (TJNAF)
>> STE 12
>> 12000 Jefferson Ave.
>> Newport News, VA 23606
>>
>> (office) 757-269-7021
>>
>> (cell)   757-876-0480
>>
>> (email) jacobsg at jlab.org <mailto:jacobsg at jlab.org>
>>
>> (website) https://userweb.jlab.org/~jacobsg 
>> <https://userweb.jlab.org/~jacobsg>
>>
>>
>>
>> ------------------------------------------------------------------------
>> *From:* William Crahen <wcrahen at jlab.org> <mailto:wcrahen at jlab.org>
>> *Sent:* Friday, January 4, 2019 4:19 PM
>> *To:* George Jacobs
>> *Cc:* Bob Miller; David Kashy
>> *Subject:* Re: [Dsg-rich] RICH N2 system automatic backup
>>
>> 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.
>>
>> On 1/4/2019 2:32 PM, George Jacobs wrote:
>>>
>>> Hi William,
>>>
>>>
>>> Can you give the DSG an estimate on when the back up N2 supply will 
>>> be ready for testing and installation in Hall B?
>>>
>>>
>>> Thanks,
>>>
>>> George
>>>
>>>
>>> -- 
>>> George Jacobs
>>> Jefferson Lab (TJNAF)
>>> STE 12
>>> 12000 Jefferson Ave.
>>> Newport News, VA 23606
>>>
>>> (office) 757-269-7021
>>>
>>> (cell)   757-876-0480
>>>
>>> (email) jacobsg at jlab.org <mailto:jacobsg at jlab.org>
>>>
>>> (website) https://userweb.jlab.org/~jacobsg 
>>> <https://userweb.jlab.org/~jacobsg>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>> *From:* Dsg-rich <dsg-rich-bounces at jlab.org> 
>>> <mailto:dsg-rich-bounces at jlab.org> on behalf of George Jacobs 
>>> <jacobsg at jlab.org> <mailto:jacobsg at jlab.org>
>>> *Sent:* Monday, December 17, 2018 4:56 PM
>>> *To:* Bill Crahen; Tyler Lemon; Bob Miller; dsg-rich
>>> *Subject:* Re: [Dsg-rich] RICH N2 system automatic backup
>>>
>>> Hi William,
>>>
>>>
>>> Please find attached files; updated and expanded components list, 
>>> updated P&I diagram, and annotated pic of assembly (for ref)
>>>
>>>
>>> Please let me know if you need any additional info.
>>>
>>>
>>> Happy Holidays!
>>>
>>>
>>> -- 
>>> George Jacobs
>>> Jefferson Lab (TJNAF)
>>> STE 12
>>> 12000 Jefferson Ave.
>>> Newport News, VA 23606
>>>
>>> (office) 757-269-7021
>>>
>>> (cell)   757-876-0480
>>>
>>> (email) jacobsg at jlab.org <mailto:jacobsg at jlab.org>
>>>
>>> (website) https://userweb.jlab.org/~jacobsg
>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>> *From:* William Crahen <wcrahen at jlab.org> <mailto:wcrahen at jlab.org>
>>> *Sent:* Friday, December 14, 2018 2:43 PM
>>> *To:* George Jacobs; Tyler Lemon; Bob Miller; dsg-rich
>>> *Subject:* Re: [Dsg-rich] RICH N2 system automatic backup
>>>
>>> George, I need more information about this system- please provide 
>>> the following:
>>>
>>> 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).
>>>
>>> there is a relief valve on this system- where is the sizing calculation?
>>>
>>> what is the pressure system number associated with this system?
>>>
>>> where is this system physically located?
>>>
>>> Are there actual mechanical drawings of this system?
>>>
>>>
>>> On 12/14/2018 1:18 PM, George Jacobs wrote:
>>>>
>>>> Please find attached files for the RICH N2  purge back-up supply.
>>>>
>>>>
>>>> -- 
>>>> George Jacobs
>>>> Jefferson Lab (TJNAF)
>>>> STE 12
>>>> 12000 Jefferson Ave.
>>>> Newport News, VA 23606
>>>>
>>>> (office) 757-269-7021
>>>>
>>>> (cell)   757-876-0480
>>>>
>>>> (email) jacobsg at jlab.org <mailto:jacobsg at jlab.org>
>>>>
>>>> (website) https://userweb.jlab.org/~jacobsg
>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>> *From:* Dsg-rich <dsg-rich-bounces at jlab.org> 
>>>> <mailto:dsg-rich-bounces at jlab.org> on behalf of Tyler Lemon 
>>>> <tlemon at jlab.org> <mailto:tlemon at jlab.org>
>>>> *Sent:* Friday, December 14, 2018 12:40 PM
>>>> *To:* Bob Miller; Bill Crahen; dsg-rich
>>>> *Subject:* Re: [Dsg-rich] RICH N2 system automatic backup
>>>>
>>>> Hello George,
>>>>
>>>>
>>>> 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?
>>>>
>>>>
>>>> Bill will be the DA for it.
>>>>
>>>>
>>>>
>>>> Best regards,
>>>>
>>>> Tyler
>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>> *From:* Bob Miller <rmiller at jlab.org> <mailto:rmiller at jlab.org>
>>>> *Sent:* Friday, December 14, 2018 9:25 AM
>>>> *To:* Tyler Lemon
>>>> *Cc:* Bill Crahen; Amrit Yegneswaran
>>>> *Subject:* Fwd: Re: [Dsg-rich] RICH N2 system automatic backup
>>>>
>>>> Hi Tyler,
>>>>
>>>>
>>>> Please send the drawings, pressure systems number, and whatever 
>>>> documentation you have to Bill Crahen and myself.
>>>>
>>>>
>>>> Bill will be the DA on this project.
>>>>
>>>>
>>>> Regards,
>>>>
>>>> Bob
>>>>
>>>>
>>>>
>>>> -------- Forwarded Message --------
>>>> Subject: 	Re: [Dsg-rich] RICH N2 system automatic backup
>>>> Date: 	Wed, 12 Dec 2018 19:39:33 -0500
>>>> From: 	Amrit Yegneswaran <yeg at jlab.org> <mailto:yeg at jlab.org>
>>>> To: 	Marco Contalbrigo <mcontalb at fe.infn.it> 
>>>> <mailto:mcontalb at fe.infn.it>, Patrizia Rossi <rossi at jlab.org> 
>>>> <mailto:rossi at jlab.org>, Bob Miller <rmiller at jlab.org> 
>>>> <mailto:rmiller at jlab.org>
>>>> CC: 	dsg-rich <dsg-rich at jlab.org> <mailto:dsg-rich at jlab.org>
>>>>
>>>>
>>>>
>>>> bob,
>>>>
>>>> please assign a design authority for the analysis and approval of 
>>>> the system.
>>>>
>>>> thanks
>>>>
>>>> amrit
>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>> *From:* Dsg-rich <dsg-rich-bounces at jlab.org> 
>>>> <mailto:dsg-rich-bounces at jlab.org> on behalf of Marco Contalbrigo 
>>>> <mcontalb at fe.infn.it> <mailto:mcontalb at fe.infn.it>
>>>> *Sent:* Wednesday, December 12, 2018 3:33 PM
>>>> *To:* Patrizia Rossi
>>>> *Cc:* dsg-rich
>>>> *Subject:* Re: [Dsg-rich] RICH N2 system automatic backup
>>>> Dear Tyler,
>>>> thank to DSG for this nice upgrade!
>>>> Marco.
>>>>
>>>> On Wed, 12 Dec 2018, Patrizia Rossi wrote:
>>>>
>>>> > Very appreciated Christmas gift!! Thank you Tyler and DSG people!!
>>>> > Patrizia
>>>> >
>>>> > Sent from my iPhone
>>>> >
>>>> > On Dec 12, 2018, at 3:13 PM, Tyler Lemon <tlemon at jlab.org> 
>>>> <mailto:tlemon at jlab.org> wrote:
>>>> >
>>>> > Hello,
>>>> >
>>>> >
>>>> >       DSG has developed a system to automatically switch RICH to 
>>>> a back up
>>>> > bank of nitrogen in the event that Hall B's main nitrogen supply is
>>>> > stopped.
>>>> >
>>>> >
>>>> >       The system is designed to use a pneumatic valve operated 
>>>> using the
>>>> >
>>>> > pressure from the main N2 supply line that will open if that supply
>>>> > pressure drops. The open pneumatic valve will then allow N2 to 
>>>> flow to
>>>> > RICH from a bank of nitrogen bottles. Attached is a revised RICH
>>>> > nitrogen system diagram showing the new automatic switch-over
>>>> > components.
>>>> >
>>>> >
>>>> > George has assembled the new components and DSG would like to 
>>>> test them
>>>> >       at the beginning of next year after the holidays. To be 
>>>> able to do any
>>>> > sort of testing, the components and test procedure will need to 
>>>> undergo
>>>> >       a pressure systems analysis by a Design Authority (DA).
>>>> >
>>>> >
>>>> >       DSG will provide the necessary documentation to the DA once 
>>>> one is
>>>> > requested and assigned.
>>>> >
>>>> >
>>>> > Best regards,
>>>> >
>>>> > Tyler
>>>> >
>>>> > <RICH-N2-valve panel-REV2..pdf>
>>>> >
>>>> > _______________________________________________
>>>> > Dsg-rich mailing list
>>>> > Dsg-rich at jlab.org <mailto:Dsg-rich at jlab.org>
>>>> > https://mailman.jlab.org/mailman/listinfo/dsg-rich
>>>> Dsg-rich Info Page <https://mailman.jlab.org/mailman/listinfo/dsg-rich>
>>>> mailman.jlab.org
>>>> 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
>>>>
>>>>
>>>> >
>>>> >
>>>> >
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_rich/attachments/20190110/69281392/attachment-0002.html>

More information about the Dsg-rich mailing list