Accession Number : ADA257714
Title : Probabilistic oil Outflow Analysis of Alternative Tanker Designs. Addendum 1.
Descriptive Note : Final rept.
Corporate Author : HERBERT ENGINEERING CORP SAN FRANCISCO CA
Report Date : Oct 1992
Pagination or Media Count : 34
Abstract : This report is an addendum to 'Probabilistic Oil Outflow Analysis of Alternative Tanker Designs', U.S. Department of Transportation, U.S. Coast Guard, Report No. CG-D-14-92, July 1992. It covers the effects of design modifications to the Double Hull, Mid-Deck and Under pressure (MARPOL) designs for the 272,000 DWT size, and clarifies the evaluation made of the under pressure concept. The design modifications were made so that these ships would meet the requirements of Regulation 23 of the MARPOL 73/78 Annex for hypothetical outflow of oil. Results for two other designs, the Coulombi Egg and POLMIS, are also presented. A probabilistic approach has been adopted for these analyses, utilizing statistical data for tanker casualties developed for the International Maritime Organization. Both side and bottom damage were considered. Loss calculations were based on hydrostatic balance principles. Initial oil loss at impact and dynamic losses due to current and waves were computed based on model tests. Plots illustrating the cumulative oil outflow for each damage condition are presented. Three 'figures of merit' were computed for each damage condition. These are: the probability of zero outflow, the mean outflow, and the extreme (1/10) outflow.
Descriptors : *FLUID FLOW , *OIL SPILLS , *TANKER SHIPS , TEST AND EVALUATION , REQUIREMENTS , TRANSPORTATION , SHIPS , IMPACT , DAMAGE , MODELS , SHIP DECKS , DYNAMICS , MODIFICATION , STATISTICAL DATA , MODEL TESTS , HYDROSTATICS , REGULATIONS , FIGURE OF MERIT
Subject Categories : Marine Engineering
Distribution Statement : APPROVED FOR PUBLIC RELEASE