NOTICE THIS REPORT WAS PREPARED AS AN ACCOUNT OF WORK SPONSORED BY THE UNITED STATES GOVERNMENT. NEITHER THE UNITED STATES NOR THE UNITED STATES DEPARTMENT OF ENERGY, NOR ANYOF THEIR EMPLOYEES, NOR ANY OF THEIR CONTRACTORS, SUBCONTRACTORS, OR THEIR EMPLOYEES, MAKES ANY WARRANTY, EXPRESSED OR IMPLIED, OR ASSUMESANY LEGAL LIABILITY OR RESPONSIBILITY FOR THE ACCURACY, COMPLETENESS OR USEFULLNESS OF ANY INFORMATION, APPARATUS, PRODUCT OR PROCESS DISCLOSED, OR REPRESENTSTHAT ITS USE WOULD NOTINFRINGE PRIVATELY OWNED RIGHTS. PRINTED IN THE UNITED STATES OF AMERICA AVAILABLE FROM: NATIONAL TECHNICAL INFORMATION SERVICES NTIS U.S. DEPARTMENT OF COMMERCE 5285 PORT ROYAL ROAD SPRINGFIELD, VA. 22161 PRICE: PRINTED COPY $21.50 MICROFICHE: $3.00