Hi Ed,
Thanks for the message.
There should be no problem. (
I don’t think Pablo/Carl can finish Power Supply short-circuit test by COB of Tuesday
😊
)
After the short-circuit test, Rob Karl’s guys
(mechanical group) will be responsible for reconnecting the braids --- CAS needs to detach the tapes first around the box.
Kin
From:
Edward O'Brien <eobrien AT bnl.gov>
Sent: Monday, October 17, 2022 3:33 PM
To: Yip, Kin <kinyip AT bnl.gov>; sphenix-magnet-l AT lists.bnl.gov; Schultheiss, Carl <carls AT bnl.gov>
Cc: Michnoff, Robert J <michnoff AT bnl.gov>; Rosas, Pablo J <rosas AT bnl.gov>; Feder, Russell <rfeder AT bnl.gov>; Pontieri, Chris <cpontieri AT bnl.gov>; Toldo, Frank A <fatoldo AT bnl.gov>
Subject: Re: [Sphenix-magnet-l] Magnet mapping installation and operation work plan --- LOTO procedure
Hi Kin and Carl,
We have some work to do inside the magnet bore
Tuesday during the day. Because of the new LOTO rules
for the sPHENIX Magnet power supply, we would like
to keep the magnet power leads to the 1008 valve box
disconnected, as they are now, until our work inside the
magnet bore is complete. We should be done by
COB Tuesday. We will let you know when we are done. Then
you can have your techs reattach the braids when you are done
with the PS short test. Is that OK? Thank you.
Ed
On 10/17/22 2:36 PM, Yip, Kin wrote:
Carl S. did another
hipot on the magnet when all voltage taps were connected and terminated end to end. At 520V, the leakage current is ~0 (< 10 microamp).
Before
hipot, Carl measured > 80 or even > 95
Mohm (depending on where he put the ground to).
This shows that after cool-down, there is no movement to cause short to ground. And also, the terminations in the voltage
tap box on the platform has no short to ground problem. (10 days ago or so, there was a 100 ohm to ground which turned out to be just that the wires in 1008B mezzanine were not terminated and shielded and so the freely hanging wires touched the shield).
We saw Tim and his colleague (working with Pablo) in 1008B and they even checked the quench relay and watchdog signals.
Carl faked a quench by setting threshold to 0 and the power supply saw the quench
🤗
Tim needs to look further into the watchdog signal as there are some miscommunication in the installation (which side us
supposed to drive the 24 V) as Tim doesn't see it now.
-------- Original message --------
Date: 10/17/22 1:08 PM (GMT-05:00)
Subject: RE: Magnet mapping installation and operation work plan --- LOTO procedure
Attached is the box (for LOTO locks) picture that we are talking about. Carl Schultheiss just put his lock (in addition
to CAS) before he went to hipot.
-------- Original message --------
Date: 10/17/22 9:52 AM (GMT-05:00)
Subject: RE: Magnet mapping installation and operation work plan --- LOTO procedure
Hello Russ and all,
45 minutes ago or so, I “caught” Pablo Rosas, Tim Costanzo et. al. before they drove to 1008B mezzanine
to continue the short-circuit test.
And I’ve also found Jon Sandberg.
Pablo told me that a formal LOTO procedure would take weeks and he’d get approval from Jon to write a
temporary one.
Jon agrees and he’ll talk with Pablo to have this LOTO procedure as soon as possible (even though Pablo
is busy).
Kin
PS:
This morning, when I said to Pablo to write a “simple” LOTO procedure, he laughed at me with the CAS Watch
colleagues and said “no LOTO
procedure is simple”
☹
From: Feder, Russell
<rfeder AT bnl.gov>
Sent: Sunday, October 16, 2022 9:30 AM
To: O'Brien, Edward
<eobrien AT bnl.gov>; Haggerty, John <haggerty AT bnl.gov>; Mills, James A
<mills AT bnl.gov>; Pontieri, Chris
<cpontieri AT bnl.gov>; Vasquez, Joel <jvasquez AT bnl.gov>; Toldo, Frank A
<fatoldo AT bnl.gov>; Yip, Kin
<kinyip AT bnl.gov>
Subject: Fw: Magnet mapping installation and operation work plan
I received this
sPHENIX LOTO justification memo written by Jon
Sanberg from Mike Danny late Friday afternoon. I had been emailing Mike Gaffney and Mike Danny about the Magnet Mapping work permit and trying to find a way to simplify safety controls on our work around
sPHENIX once the power supply is connected.
Jon
Sanberg wrote up this attached LOTO justification and scenario. We still need a complex LOTO procedure written by a qualified person.
This is only temporary, in place until mapping is done and we can disconnect
the power supply and also get outside the USI "bubble".
sPHENIX
Chief Mechanical Engineer
Russ,
I have already contacted Eric Johannsen and copied him on Jon Sandberg’s proposed LOTO scenario (attached). He will review but is out on business travel next week.
I’ll follow up.
M. Dany
That may be the easier way if there is one output valve.
With the LOTO issue, this is a compliance to OSHA and I would advise to get the expert involved in determining
if it falls under Service and Maintenance or Operational. Mike Dany know Eric Johannsen and before BSHO gets involved, it would be good to have an answer.
Michael Gaffney
Safety Engineer
Safety & Health Services Division
Brookhaven National Laboratory
gaffney AT bnl.gov
(631) 344-7468
Ok thank you for reminding about the "don't get tangled in the robot" hazard. That's a good catch.
Do you think we need to LOTO the compressor? This may not be practical because we need to connect air lines and see how things are working when the robot is sitting out on that extension shelf. People will need to be able to work on the robot with air pressure
to it. We could lock out the compressor for when people are in the bore if the robot gets stuck inside there for some reason. Let me ask the CERN guys what they have done at other installations.
The Complex LOTO scenario is a little confusing to me too, and I think it's overkill to be honest.
I understand what Ray is going for but I really think if we lock out the power supply and have Mike Rau or Joel or another qualified person just hold on to the lock, we will be in good shape. We are really setting ourselves up for a misstep and a violation
because of the number of people involved. On top of the this, the pole tip doors have interlocked limit switches. When the pole tip doors are open, the magnet can't turn on. Ray doesn't think this is sufficient for human safety, just machine protection.
I need someone qualified to write this Complex LOTO procedure which will clarify things.
sPHENIX Chief Mechanical Engineer
Under Dosimetry/Monitoring:
TLDs may be required.
Typically, area ODH monitoring/alarm systems isn’t in this section unless POMs are required. The ODH
alarm system is identified in the Safety and security concerns. (however, cryogenic may want to be checked if there is a leak, staff may be exposed to the cryogen)
Prior to energizing the magnet, a physical check of all unsecure objects that could be affected by
a magnetic field (this would include fasteners, tools, compressed gas cylinders) are removed. I verified that the air compressor tank is secure and should not be an issue.
The hazard of robot motion when staff in bore needs to be address (including entrapment/entanglement)
and mitigation documented (should be noted in the Safety and Security Concerns section of the work permit).
I do not understand “operations lockout” style lock. It needs to be verified that this is the appropriate
control level and not a “Service and Maintenance” activity which is covered by the LOTO subject area.
When will someone 5G magnetic fields be taken? The mapping station is a concern.
Michael Gaffney
Safety Engineer
Safety & Health Services Division
Brookhaven National Laboratory
gaffney AT bnl.gov
(631) 344-7468
Attached is a revised version of the magnet mapping installation and operation work plan.
After a few discussions with Ray Fliller and others we've added the requirement for a Complete LOTO for workers accessing the
sPHENIX bore once the magnet power supply is connected. I need to get a complex LOTO procedure written by a qualified person and I don't have that yet.
We want to start installing mapper mechanical equipment in the bore before the power supply is connected. I'd like to get this green
sheet work permit approved with the understanding that we will revise it once we get the complex LOTO procedure in hand. We will also not do this work in the bore if we don't have the LOTO procedure (and trained and briefed people) once the power supply is
connected. Can you please help me get this distributed and signed off? We want to start installing this equipment next week once we get the pole tip doors open.
The permit also covers other hazards like ODH that are already present.
sPHENIX Chief Mechanical
Engineer
From: Feder, Russell <rfeder AT bnl.gov>
Sent: Thursday, September 29, 2022 6:34 PM
To: Albanese, Marianna <malbanese AT bnl.gov>; Mills, James A <mills AT bnl.gov>; Gaffney, Michael <gaffney AT bnl.gov>;
Dany, Michael <mdany AT bnl.gov>; Feder, Russell <rfeder AT bnl.gov>; Haggerty, John <haggerty AT bnl.gov>; Yip, Kin <kinyip AT bnl.gov>;
Toldo, Frank A <fatoldo AT bnl.gov>; Pontieri, Chris <cpontieri AT bnl.gov>
Subject: Magnet mapping installation and operation work plan
Attached is a draft of the magnet mapping work planning package and the green sheet work permit. This link is to the PowerPoint version.
2022SEPT29_MAGNET_MAPPING_Work_Plan_V1
There is a separate operating procedure for the sPHENIX magnet, managed by Kin Yip. I have to update this work plan with that document number reference once I get it tomorrow.
Please review and comment and let me know if you have any questions, concerns, edits, updates, or things you want to talk about.
Go ahead and distribute this to others as well for review.
We should work to get this approved and signed off by 10/10.
sPHENIX Chief Mechanical
Engineer
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