Advanced nodal code, ARROTTA, normalization experience
Advanced nodal codes can be distinguished from older nodal codes by the following characteristics: (1) two neutron groups, (2) capability for explicit reflector region, (3) improved treatment of leakage to the surrounding orthogonal nodes; and (4) if heterogeneous nodes are to be represented, assembly discontinuity factors that can be analytically determined from a reference calculation easily produce agreement between coarse mesh nodal and fine mesh reference calculations. The ARROTTA advanced nodal code has the characteristics described above. It is intended for static and transient calculations as branches initialized from some depletion point of a standard core follow procedure. Thus, the same default core cycle data base generator, EPRI-PRESS, that provides input to standard nodal codes routinely used in pressurized water reactor (PWR) core representation, also provides the data base processed by the ARROTTA input generator, which is a revision of the BLEND code. This paper deals with the first step in the application of the data base to the representation within ARROTTA of two cores at beginning of life (BOL), Zion unit 2 and Catawba unit 1.
- OSTI ID:
- 6810056
- Report Number(s):
- CONF-8711195-
- Journal Information:
- Trans. Am. Nucl. Soc.; (United States), Journal Name: Trans. Am. Nucl. Soc.; (United States) Vol. 55; ISSN TANSA
- Country of Publication:
- United States
- Language:
- English
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