[Utility Outage] Scheduled HVAC Outage - 12/30/2014 03:00

[Carroll W. Jones]

The following HVAC Outage has been Confirmed:

Outage:      Install Valves in Test Lab Basement Chilled Water Piping to Reduce UIM Impact
Proposed By: Carroll W. Jones
Start Time:  12/30/2014 03:00
End Time:    12/30/2014 22:00

Description/Impacts:
Six (6) butterfly valves and associated piping modifications are to be installed in the Test Lab basement chilled water piping to minimize future adverse impacts to lab operations during execution of the UIM CEBAF Center Cooling and Power Upgrade Project.  Prior to the upcoming holiday break, cooling will be switched from the Test Lab basement chillers to the CUP Chiller to enable the F-Wing Data Center not to be impacted by the required shutdown and draining of chilled water piping in the Test Lab basement.  All other areas cooled by the Central Chiller Plant System will not have chilled water flow the majority of Tuesday December 2014.  Areas impacted include the Test Lab TLA (including cleanrooms, labs, and UPW components cooled with chilled water), the Test Lab highbay, the Test Lab North Addition (includes HDIce area and the UHV Furnace), the EEL Building (all areas except the second floor office area - includes all cleanrooms), and the Accelerator service building chill
 ed water loop.  Work is being performed during the holiday break since the Accelerator and process areas will not be operational and ambient conditions should be cool and dry enough minimize impact to cleanrooms.  If the valves are not installed during this period, the chilled water system shutdown will have to occur during warmer more humid weather or possibly result in significant delay of UIM Project completion.  As much work as possible (welding weldolets for 12" taps and relocation of Process Cooling Water System makeup water and reservoir nitrogen supply piping will be performed prior to the actual chilled water system shutdown. Piping will be isolated and draining will begin Tuesday 12-30-14 about 3 AM.  Piping modifications and installation of valves will continue until the system can be restored to normal operation late Tuesday night.

For additional information or clarification, please contact Carroll Jones at 757-876-1778.  

Impacted Areas:
	Bldg 01: North LINAC
	Bldg 02: South LINAC
	Bldg 21: North Extractor Service
	Bldg 38: South Access
	Bldg 39: East Arc Service
	Bldg 40: West Arc Service
	Bldg 45: West Arc Service
	Bldg 49: East Arc Service
	Bldg 50: East Arc Service
	Bldg 53: Injector Service
	Bldg 56: West Arc Service
	Bldg 63: East Arc Service
	Bldg 67: North Access
	Bldg 68: West Arc Service
	Bldg 82: South Extractor Service
	Bldg 12: CEBAF Center
	Bldg 58: Test Lab
	Bldg 90: Experimental Equipment Lab

For more details, visit the webpage listed below:
https://cc.jlab.org/cgi-bin/infrastructure/Outage/OutageView?ident=8