[Esr-users] Fw: Weather response update

[David Kashy]

Hi All,
Please see the email below for possible changes in cryogenic support at JLab.
Dave

________________________________
From: Jonathan Creel <creel at jlab.org>
Sent: Wednesday, January 19, 2022 11:27 AM
To: Stuart Henderson <stuart at jlab.org>; Allison Lung <lung at jlab.org>; Bob McKeown <bmck at jlab.org>; Cynthia (Thia) Keppel <keppel at jlab.org>; Rusty Sprouse <sprouse at jlab.org>; Steve Suhring <suhring at jlab.org>; Camille Ginsburg <ginsburg at jlab.org>; Will Oren <oren at jlab.org>; Tim Michalski <michalsk at jlab.org>; Andrei Seryi <seryi at jlab.org>; Steven Hoey <hoey at jlab.org>; Brian Hanlon <hanlon at jlab.org>; Michael Maier <mmaier at jlab.org>; David Kashy <kashy at jlab.org>; Shawn Frierson <frierson at jlab.org>; Paul Vasilauskis <vasilaus at jlab.org>; Ken Baggett <baggett at jlab.org>; Douglas Higinbotham <doug at jlab.org>; Bob Sperlazza <sperlazz at jlab.org>
Cc: Joe Wilson <jwilson at jlab.org>
Subject: Weather response update

This email is just to inform.

When we are operating the CEBAF machine the cryogenic plants have a voracious appetite for power and liquid nitrogen so we are always monitoring the weather to understand how it might effect our plant operations.

As you might know we are facing potential snow storms heading our way. The predicted impact of these storms varies wildly. These storms have the ability to effect power and operations at the lab and can effect our ability to get liquid nitrogen from our vendor in Hopewell. Ice and snow effect power and the operation of the vendors LN2 plant. It can effect their ability to get truck drivers to work, the condition of the roads from Hopewell to JLab, and the condition of the roads and fill stations here on site.

Facilities Management has a plan and will have personnel on standby to clear the site roads with priority given to accessing the LN2 fill stations.

We are working with our LN2 vendor to have our dewars topped up before the storms arrive. We will communications with them as the situation evolves to understand their ability to deliver our LN2.

If we develop issues with receiving LN2 deliveries for a wide enough window that places us at risk of exhausting our on site storage then we will take action to reduce our consumption to make the on site storage last longer to keep the cryo plants running to protect the helium inventory.

Our typical reaction plan to LN2 issues ramps up in the following steps
Phase 1
Shutdown beam
Transition CHL1 plant to 4.5K
Ramp Hall magnets to zero current
Warmup cryogenic targets

Phase 2
Transition CHL2 plant to 4.5K

Phase 3
Shutdown and secure the CTF plant

None or all of these actions might be required we just want to keep people informed as we move forward.

We will make decisions based on the best information we can get from our vendor and our projections of LN2 consumption.

Regards,
Jonathan

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