Document: NUREG-0800
Document ID: a41f4aae-e975-45f3-aebc-5519bec72c6e
Document Type: srp
Title: CRITICALITY SAFETY OF FRESH AND SPENT FUEL STORAGE AND HANDLING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070570006.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.1.1
CFR Part: 
CFR Title: 

Content:
analysis method used to determine the maximum K(eff) values should be described in sufficient detail to permit verification that the method is appropriate and performed correctly. The validation study should address the following issues: i. Computational method used, including the following: (1) Computer codes, nuclear data, modeling options, and approximations ii. Critical experiment similarity to criticality analysis cases, including the following: (1) Description of the process and criteria used to select the critical experiments (2) List of critical experiments used for each bias determination iii. Incorporation of critical experiment uncertainties and biases related to the following: (1) Measurement of K(eff) and extrapolation or adjustment of physical parameters, such as critical water height, to criticality (2) Critical experiment physical description (3) Model uncertainties and biases related to assumptions and modeling approximations iv. Determination of maximum allowable K(eff) values v. Determination of area of applicability for maximum K(eff) values The reviewer verifies that the validation study description is complete and that the validation study used acceptable methods and was performed correctly. E. The reviewer evaluates the identification of normal conditions to verify that the scope of specified normal conditions is comprehensive. Descriptions should be provided that define normal conditions associated with the storage and handling of fresh and spent fuel. In addition to being used to evaluate the subcriticality of normal conditions, the described normal conditions serve as the basis of initial conditions for evaluating abnormal conditions. The reviewer verifies that the normal-conditions descriptions are comprehensive and that the logic used to envelop one or more classes of normal conditions is sound. F. The reviewer evaluates the normal-conditions models to verify that normal conditions are modeled correctly and that all modeling