mechanical arrangements of the equipment It became possible to standarice many items of piping to maxe equipment arrangements which were typical for the =niwetok and Parry plants. Later the arrangement of the equipment in the experiment island power plants was standardized. Parry Island. The Aeconnaissance Report set up the estimated population for Parry at 600 and the estimated power demand at 300 kw, On this basis, four 142 kw diesel generator units were ordered for this plant, two on July 5, 1949, and two on July 19, 1949. This order was split in two parts because it was not until July 19, 1949, that funds for fiscal year 1950 were made available to Holmes & Narver, The power plant wes similar in design and construction to the power plant on Eniwetok which has previously been described, This plant was designed for four 142 kw diesel generator units and a space for one future unit, Information contained in Supplement No. 1 to the Reconnaissance Report indicated an increase in maximum demand from 300 kw‘: 405 kw due to increase in the requirements for laboratories, Addition of the CMR (Stations 329 and 330) and contemplated enlarged water distillation requirements based upon an increase in population to 1060 people, resulted in the purchase of two additional 142 kw units in February of 199, Consideration was given to the location of these two additional generator units in the area adjacent to the CMR facilities. However, careful analysis led to the decision to place these two additional units in the main power plant, Space had been provided for one spare unit, and to accommodate the second additional unit, the power plant was lengthened 20 feet. This additional length provided space on the water distillation side of the plant for the installation of the additional distillation units, Power plant drawings were revised, and the extension to the power plant was started in November 1950, The final station installation of six 142 kw units provided a firm capacity of 710 kw (with one unit out of service) to handle the estimated maximum demand of 690 kw. The type of building for the power house on Parry and the mechanical equipment accessories and piping arrangements were generally the same as for Eniwetok Island. Figure 5,15-2 shows the power and water distillation plant and equipment and piping plan for Parry Island. Japtan Island. The power plant at Japtan was a typical single bay prefabricated alumimmm structure which housed the water distillation equipment as well as the power generating equipment. The por- tion of the building housing the generator unit was placed on a 6 foot concrete wall to provide the required headroom. Site electrical re- quirements were estimated to be 75 kw and therefore one 118 kw unit was designed and installed. Space was provided in the power plant for setting up a portable 75 kw unit which had been used on this site during the construction phase. This unit was rated at 208 volts and was installed to serve as a standby when the 118 kw unit was out of service for overhaul. Addition of electrical loads in the laboratory and shops revised the maximum demand to the extent that the 75 kw unit was not of suffi5-208