The T1 cooling package inlet pressure (P1) has been dropping since approximately May 5, 2013 from the regular operating pressure of approximately 75psi to the present value of 47psi.  An increase in the rate of decrease started around August 5th as well as increased noise in the signal.  Plots attached below.  No corresponding change in the outlet pressure, and no change in the water flow rate (also no change in inlet and oulet temperatures) leads to the conclusion that the transducer is failing or gas is trapped in the lines leading to the transducers in the BL1A tunnel.

Jamie Cessford and Ron Kuramoto are aware of the situation.  The issue will be addressed during the September mini-shutdown.