Pumping Rates for Water Drainage in the Main Ring Tunnel: Scale Considerations of the SSC

摘要

The Fermilab site has water bearing, geologic units distributed uniformly above a flat bedrock surface. These units, i.e., glacial tills, sands, and gravels are seasonably fed by fluctuations in rainfall and melting snow. Since the overall site topography is flat, ground water settles, often saturates the soil, and creates a challenge to the relatively dry requirements of the accelerator tunnel. Subsurface pumping of the water is achieved by the operation of online sump pumps, one pump in each of the 24 service buildings which access the tunnel. Drainage overflows are exhausted into a network of interconnected ponds. The objective of this note is to calculate the pumping rate for water drainage in the Main Ring Tunnel, correct for statistical and engineering fluctuations, and to discuss pumping requirements on the SSC scale. (ERA citation 10:008997)