[Testlablcwusers] Test Lab LCW System Low Flow

[Carroll Jones]

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.

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

Sincerely,

Carroll W. Jones


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