This report was prepared u an account of work sponsored by the United States Government. Neither the United States nor the United States Nuclear Regulatory Commission, nor any of their employees, nor any of their contractors, subcontracton, or their employees, makes any warrant)', express or implied, or assumes any legal liability or responsibility for the accuracy, completeness or usefuln~s of any information, apparatus, product or process disclosed, or represents that its use would not infringe privately owned rights.