1 - Alaska Energy Data Inventory

I. Computer Models.(1) Computer Program "WHAMO" - "WHAMO" (water hammer and massoscillation) is a digital computer program originally prepared for theMissouri River Division in the 1960s. The program was updated by the firmof Camp, Dresser and McKee of Waltham, Massachusetts, in 1978 and is nowavailable to the Alaska District on its Harris Computer System. There is amore recent version of "WHAMO" (1984) which is capable of calculatingtransients for a compressed air surge tank and also has an electricgovernor option, but this version is available only on the Amdahl system inPortland. We used the 1978 version because of the convenience of theHarris System here in Anchorage.(2) Cornputer Program "MSURGE II - was used for stab il i ty runs andto check reject run results from "WHAMO". "MSURGE" is based on theArithmetic Integration procedure as described in reference 14 and isavailable on the Harris System in the Alaska District.J. Stab il ity By "WHAMO".(1) Results of "WHAMO" Runs - "WHAMO" was used to calculatecritical surge tank diameters for the nominal horseshoe tunnel diameter of11.0 ft and for the expected tunnel diameter of 12.4 ft. "WHAMO" producedcritical surge tank diameters of 6.0 ft and 7.3 ft for the smaller (11 ft)and larger (12.4 ft) tunnels, respectively. The analysis was based onminimum hydraulic losses, a pool elevation of 858.4 ft, and a tailwaterelevation of 11.4 ft. Power settings were increased from 38,000 to 38,500HP for the 11 ft diameter tunnel and from 38,500 to 39,000 HP for the 12.4ft diameter tunnel.It is 1 ikely that a somewhat larger critical surgetank diameter could have been calculated if a wide variety of power settingand reservoir elevations had been tried, but, it is apparent that therecommended 10 ft surge tank diameter wi 11safety.provide an adequate factor ofBl-31