[Dsg-rich] OSP for CLAS 12 RICH

[Valery Kubarovsky]

Hi Marc, 
Do you have news about RICH OSP? 
thanks, 
Valery 

> From: "Marc McMullen" <mcmullen at jlab.org>
> To: "Timothy Whitlatch" <whitey at jlab.org>, "Valery Kubarovsky" <vpk at jlab.org>
> Cc: "Bob Miller" <rmiller at jlab.org>, "Will Oren" <oren at jlab.org>,
> dsg-rich at jlab.org
> Sent: Monday, November 7, 2016 4:21:46 PM
> Subject: Re: [Dsg-rich] Fwd: OSP for CLAS 12 RICH

> Hi Bob,

> The INFN collaborators request that you please provide some support on the
> design authority and ASME issues pertaining to the RICH OSP.

> Thanks,

> Marc

> On 11/7/2016 3:57 PM, Timothy Whitlatch wrote:

>> Hi Valery,

>> I spoke with Septarshi about some of the pressure systems questions. He stated
>> that there was no DA assigned and Bob Miller would assign one.

>> The pressure system hazards will be reviewed and mitigated by the DA and a
>> pressure system number assigned if needed.

>> I am rejecting this OSP since there will be additions to the THA and other
>> information on the procedure.

>> Please let me know when this is ready again and I will review again.

>> Thanks,

>> Tim Whitlatch
>> Hall D Engineer
>> Jefferson Lab
>> 600 KELVIN DR STE 5
>> Newport News, VA 23606-4468
>> 757-269-5087

>> From: "Marc McMullen" <mcmullen at jlab.org>
>> To: "Timothy Whitlatch" <whitey at jlab.org>
>> Sent: Wednesday, November 2, 2016 1:58:47 PM
>> Subject: Fwd: Re: [Dsg-rich] Fwd: OSP for CLAS 12 RICH

>> Hi Tim, Valery sent me a list of questions, which you asked. I have responded to
>> the questions inline, or at least pointed you to the person who could provide
>> an answer. Thanks, Marc McMullen Physics Division Detector Support Group 7738
>> ----- Forwarded Message ----- From: Marc McMullen To: dsg-rich at jlab.org Sent:
>> Tue, 01 Nov 2016 16:05:04 -0400 (EDT) Subject: Re: [Dsg-rich] Fwd: OSP for CLAS
>> 12 RICH

>> Hi Valery,

>> 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.

>> Thanks

>> Marc

>> On 11/1/2016 2:23 PM, Valery Kubarovsky wrote:

>>> Dear George and Marc,

>>> I submitted OSP for the RICH12 operation. It includes gas cooling system and
>>> nitrogen purge system that you designed.

>>> https://mis.jlab.org/mis/apps/mis_forms/operational_safety_procedure_form.cfm?ENTRY_ID=63644&approvalVersion=2

>>> I got a couple of questions from Timothy Whitlatch, who is reviewing this OSP.
>>> Please, send me the replies to all his questions.

>>> Thanks,
>>> Valery

>>> From: "Timothy Whitlatch" <whitey at jlab.org>
>>> To: "Valery Kubarovsky" <vpk at jlab.org>
>>> Cc: "Will Oren" <oren at jlab.org> , "Bert Manzlak" <manzlak at jlab.org>
>>> Sent: Tuesday, November 1, 2016 11:47:35 AM
>>> Subject: OSP for CLAS 12 RICH

>>> Good Morning Valery,

>>> I have been looking over your OSP in order to provide Pressure Systems approval.

>>> https://mis.jlab.org/mis/apps/mis_forms/operational_safety_procedure_form.cfm?ENTRY_ID=63644&approvalVersion=2

>>> I have a few questions;

>>> There are 2 pressure systems, air and nitrogen.

>>> Are there associated JLAB pressure system numbers assigned to these systems?

>>> Who is the JLAB DA (Design Authority) for each of these systems?

>> Saptarshi Mandal worked on the ASME documentation for the RICH. He may be able
>> to answer both of the first two questions.

>>> Are there associated personnel hazards with these systems? (nothing indicated on
>>> the THA form).

>> 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.

>> 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.

>>> Are there hazards associated with entering the enclosure with the air cooling
>>> system on?

>> You may want to ask Bob Miller this question.

>>> Is there an ODH hazard in the hall due to the nitrogen system?

>> 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.

>>> Are there detailed procedures for operating the nitrogen and air systems?

>> 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.

>>> 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.

>> This is another Hall B decision, they would be providing daily
>> operations/on-call support. Bob may be able to give you a list.

>>> 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?

>> 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.

>>> There are several "TBD"s for threshold values. Have these been determined?

>> 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.

>>> Thank you,

>>> Tim Whitlatch
>>> Hall D Engineer
>>> Jefferson Lab
>>> 600 KELVIN DR STE 5
>>> Newport News, VA 23606-4468
>>> 757-269-5087

>>> _______________________________________________
>>> Dsg-rich mailing list Dsg-rich at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/dsg-rich

>> --
>> Marc McMullen
>> Detector Support Group
>> 757-269-7738

> --
> Marc McMullen
> Detector Support Group
> 757-269-7738
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