Development of economic activity in Far East increases the number of vessels going around Japan. So oil spill in wrecking at sea is highly probable. Early oil recovery reduces the damages. It is important to respond immediately to the oil spill for saving economical and social activity in coastal zone and cities in Japan.
　This article reports about development of an oil spill response system package that can be transported on 2 trucks (if it is in categorized 4 ton class) in an emergency. The system is capable to be transported by a crane barges with the purpose of oil recovery operation in an emergency. There are about 900 crane barges which can be used for oil spill recovery in Japan. As a main system of the package, we developed “Bucket Oil Skimmer with Raking Device” and “Boom Extension Buoy System”. They were tested in our large tank (STORMS) using real oil with waves and their performances have been estimated. In 2006, the prototype models of the both systems were made in small scale and they were tested at Sakai Port in order to study their operational factor.
　As a result of tank tests under the condition of 2cm oil slick thickness, the oil recovery rate in the real size model of “Bucket Oil Skimmer with Raking Device” is estimated at 5.9 t/h, oil recovery efficiency estimated at 70%. These figures are superior to the recovery rate derived from the test data for a grab bucket
model. In case of operation by the grab bucket, the oil recovery rate is 5.7 t/h and the oil recovery efficiency 34%. In the prototype operation test, the system were appreciated that the operation and assembling at the site were enough easy to carry out the oil recovery operation.
　The following result is derived from the test in “Boom Extension Buoy System”; the stability of the extension shape of the boom can be preserved when current speed becomes more than 0.5 knt (25cm/s) in the tests employing. However, at the prototype field test in the sea, we found that the boom was affected by ship waves due to other vessels and consideration about wave direction in necessary for the
system stability. And it was revealed that the structure of the buoy should be improved for assembling at the site on the deck of the crane barge.