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Sam</div>
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I just went up there at 9am and throttled it back to where the bypass has historically been. Closing down the bypass increases pressure everywhere else and back roughly to where should be. </div>
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I documented the 70 GPM back in 2019 when the klystrons were running and Leonard told me that was the proper flow. If it is 35-40gpm is correct, then that's fine, your the expert. Therefore the S/R needs to be adjusted as well. </div>
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Phil</div>
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<div id="divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Sam Holben <holben@jlab.org><br>
<b>Sent:</b> Monday, July 29, 2024 9:41 AM<br>
<b>To:</b> Philip Denny <denny@jlab.org>; Michael Drury <drury@jlab.org>; David Kashy <kashy@jlab.org>; Carroll Jones <jonesc@jlab.org>; testlablcwusers@jlab.org <testlablcwusers@jlab.org><br>
<b>Cc:</b> Mike Sprouse <msprouse@jlab.org>; David Sulouff <sulouff@jlab.org>; James Beason <beason@jlab.org><br>
<b>Subject:</b> Re: Test Lab LCW System Low Flow</span>
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Phil,</div>
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It looks like the bypass is barely open. The flow inside the HPA is a lot higher than it should be. 65+ gpm. The nominal flow in the HPA should be 35 to 40 gpm. I am not sure why the flow is so high. We can not adjust the flow inside the HPA due to the
safety pause, but it can be regulated with the valve outside at the supply manifold. This high flow rate in the HPA may explain the low pressure in the system. There is new signage that states the flow should be 70 gpm. I do not know who added this signage
or for what reason. Our part of the system only requires 35 to 40 gpm. Mike do you have any input as to the reason for the flow increase?</div>
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Sam</div>
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<div id="x_divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Philip Denny <denny@jlab.org><br>
<b>Sent:</b> Monday, July 29, 2024 8:39 AM<br>
<b>To:</b> Michael Drury <drury@jlab.org>; Sam Holben <holben@jlab.org>; David Kashy <kashy@jlab.org>; Carroll Jones <jonesc@jlab.org>; testlablcwusers@jlab.org <testlablcwusers@jlab.org><br>
<b>Cc:</b> Mike Sprouse <msprouse@jlab.org>; David Sulouff <sulouff@jlab.org>; James Beason <beason@jlab.org><br>
<b>Subject:</b> Re: Test Lab LCW System Low Flow</span>
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<div style="direction: ltr;">I believe they want to keep a small amount of flow through the klystron hx when not in use. I will go upstairs and throttle it back to where I believe it should be.</div>
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<div id="x_x_ms-outlook-mobile-signature" dir="auto">Get <a href="https://aka.ms/AAb9ysg" id="OWAd9cd71b9-4de5-de27-6ccb-cdb796577521" class="OWAAutoLink" data-auth="NotApplicable">
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<div id="x_x_divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Testlablcwusers <testlablcwusers-bounces@jlab.org> on behalf of Michael Drury <drury@jlab.org><br>
<b>Sent:</b> Monday, July 29, 2024 8:34:12 AM<br>
<b>To:</b> Sam Holben <holben@jlab.org>; David Kashy <kashy@jlab.org>; Carroll Jones <jonesc@jlab.org>; testlablcwusers@jlab.org <testlablcwusers@jlab.org><br>
<b>Cc:</b> Mike Sprouse <msprouse@jlab.org>; David Sulouff <sulouff@jlab.org>; James Beason <beason@jlab.org><br>
<b>Subject:</b> Re: [Testlablcwusers] Test Lab LCW System Low Flow</span>
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<div style="direction: ltr;">I am unaware of a need to have the bypass open. </div>
<div style="direction: ltr;">Mike D. </div>
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<div id="x_x_x_ms-outlook-mobile-signature" dir="auto">Sent from my T-Mobile 5G Device<br>
Get <a href="https://aka.ms/AAb9ysg" id="OWAc97900fd-12ad-d088-c52a-7926f8036816" class="OWAAutoLink" data-auth="NotApplicable">
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<div id="x_x_x_divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Testlablcwusers <testlablcwusers-bounces@jlab.org> on behalf of Sam Holben <holben@jlab.org><br>
<b>Sent:</b> Monday, July 29, 2024 8:02:42 AM<br>
<b>To:</b> David Kashy <kashy@jlab.org>; Carroll Jones <jonesc@jlab.org>; testlablcwusers@jlab.org <testlablcwusers@jlab.org><br>
<b>Cc:</b> James Beason <beason@jlab.org>; David Sulouff <sulouff@jlab.org>; Mike Sprouse <msprouse@jlab.org><br>
<b>Subject:</b> Re: [Testlablcwusers] Test Lab LCW System Low Flow</span>
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Carroll,</div>
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At this time there should not be any reason for the CMTF LCW bypass to be open. That said, check with Mike Drury and his group to see if there has been a need for the bypass to be open. We only open the bypass when the HPA LCW valves are closed. Our understanding
is there is a possibility for the system to be "dead headed" if there is no flow upstairs. Hence the need for the bypass. I hope this answers some questions.</div>
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Sam</div>
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<div id="x_x_x_x_divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Testlablcwusers <testlablcwusers-bounces@jlab.org> on behalf of David Kashy <kashy@jlab.org><br>
<b>Sent:</b> Monday, July 29, 2024 7:38 AM<br>
<b>To:</b> Carroll Jones <jonesc@jlab.org>; testlablcwusers@jlab.org <testlablcwusers@jlab.org><br>
<b>Cc:</b> Mike Sprouse <msprouse@jlab.org>; David Sulouff <sulouff@jlab.org>; James Beason <beason@jlab.org><br>
<b>Subject:</b> Re: [Testlablcwusers] Test Lab LCW System Low Flow</span>
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Hi Test Lab LCW Users,</div>
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Yes, we see the low supply pressure here in the MOLLER area of the test lab too. The supply/return pressurses as read on the gages outside the control room now read 78/30 psig. At 40psid we would not be able to run our magnet testing program. We will not need
to do that for many months, but we all need to be good stewards of the system and use the minimum necessary to allow flexibility for all to operate as needed. With that said we (MOLLER) when we do run the magnets will likely take enough flow to drag down the
supply pressure and thus we plan on giving 4 week notice or more to allow us all to share this critical resource.</div>
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Please check your systems for open bypass valves or other load which could be throttled when not in use.</div>
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Thanks</div>
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Dave Kashy</div>
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<div id="x_x_x_x_x_divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Testlablcwusers <testlablcwusers-bounces@jlab.org> on behalf of Carroll Jones <jonesc@jlab.org><br>
<b>Sent:</b> Friday, July 26, 2024 5:21 PM<br>
<b>To:</b> testlablcwusers@jlab.org <testlablcwusers@jlab.org><br>
<b>Cc:</b> James Beason <beason@jlab.org>; David Sulouff <sulouff@jlab.org>; Mike Sprouse <msprouse@jlab.org><br>
<b>Subject:</b> [Testlablcwusers] Test Lab LCW System Low Flow</span>
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Phil Denny informed me that there was a report of Test Lab LCW flow lower than normal. Supply pressure was confirmed significantly lower than normal (95 versus 130 PSIG). I checked the basement pump and piping. The bypass valve around the pressure control
valve was cracked a little which resulted in an increase of about 15 PSIG when closed or supply pressure of 110 PSIG. I then determine a little flow is leaking pass the control valve which if corrected could increase supply pressure about 4 PSIG, I will
have troubleshot by our controls subcontractor. The 4 PSIG will not restore the system to normal operating supply pressure so I continued looking at the system and valve configuration in the highbay area. I found the bypass between supply and return piping
south of the klystron racks on the mezzanine is fully open. I believe if the bypass valve is closed, system pressure will return to normal. I left the valve open in case it was opened for a reason that I am unaware. Recommend this valve be closed by user
supporting the klystron racks and system supply pressure checked.</div>
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For additional information or clarification, please contact me at 757-876-1778.</div>
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Sincerely,</div>
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Carroll W. Jones </div>
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