[Code of Federal Regulations]
[Title 40, Volume 22]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR197.14]

[Page 63]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 197--PUBLIC HEALTH AND ENVIRONMENTAL RADIATION PROTECTION STANDARDS 
FOR YUCCA MOUNTAIN, NEVADA--Table of Contents
 
    Subpart B--Public Health and Environmental Standards for Disposal
 
Sec. 197.14  What is a reasonable expectation?

    Reasonable expectation means that NRC is satisfied that compliance 
will be achieved based upon the full record before it. Characteristics 
of reasonable expectation include that it:
    (a) Requires less than absolute proof because absolute proof is 
impossible to attain for disposal due to the uncertainty of projecting 
long-term performance;
    (b) Accounts for the inherently greater uncertainties in making 
long-term projections of the performance of the Yucca Mountain disposal 
system;
    (c) Does not exclude important parameters from assessments and 
analyses simply because they are difficult to precisely quantify to a 
high degree of confidence; and
    (d) Focuses performance assessments and analyses upon the full range 
of defensible and reasonable parameter distributions rather than only 
upon extreme physical situations and parameter values.