Nonlinear PRD components of EBR-II compared with bowing analyses

Conference · Wed Dec 31 23:00:00 EST 1986 · Trans. Am. Nucl. Soc.; (United States)

OSTI ID:6869953

Meneghetti, D; Kucera, D A

The nonlinear components of the power reactivity decrements (PRDs) for Experimental Breeder Reactor II (EBR-II) runs 85A, 93A, 99A, and 122A have been reported. These nonlinear components were deduced by subtraction of the calculated linear (and Doppler) components from the measured PRD curves. The linear (and Doppler) components of the PRDs were calculated using the EBRPOCO program together with an addition to the program (RODCO) that accounts for the effects of positionings of the control rods. Corresponding calculated bowing components of these runs have now been calculated assuming that the hex can ducts are unirradiated and thus have been assumed to have neither swelling nor bowing at the zero-power level in the analyses. Furthermore, the initial separations of the subassemblies at the contact-button levels are all assumed to be the unirradiated nominal 0.002 in. (0.051 mm). Comparison of these calculations with the bowing components deduced from the measurements enable the signs and magnitudes of the effects of the unknown initial conditions to be ascertained.

• Research Organization: Argonne National Lab., IL (USA)
• OSTI ID: 6869953
• 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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