The flow direction in the coolant channels may be either up or down, thereby permitting the analysis of two-pass as well as single-pass fuel elements. MANTA is designed for single-pass steam flow. MANTA analyzes mixing between coolant channels, allows for temperature variant conductivity in admittance calculations, and multiple stacked segments through the fuel region for a 7-element cluster analysis over a length of up to 8 feet. It was designed to analyze fuel element configuration in the superheat development program. MANTA is a program which provides a thermal-hydraulic nodal analysis in the steady state.
Both reactors are now in their second cycle of operation with ANF clips. Estimation of the clip removal force indicated the clips were firmly attached to the rods, thus confirming the adequacy of the clip design. Clip removal at the end of the cycle was carried out on schedule. No more baffle-jetting failures have been reported.
#Duke simply fortran full
Both reactors have operated one full cycle with ANF clips. Installation of ANF fuel-rod clips in the McGuire-1 and McGuire-2 reactors by Duke Power has proven successful in eliminating baffle-jetting damage. The most promising approach was the proven fuel-rod clips more » designed by Advanced Nuclear Fuels Corporation (ANF) on assemblies exposed to baffle jetting. Duke Power performed a study of possible methods of modifying a fuel assembly to eliminate baffle-jetting damage. Prevention of further baffle-jetting damage was essential to forestall increased reactor and coolant contamination, maintain fuel assembly integrity, and minimize the impact on core operating power. The cladding of these three fuel rods had failed due to fretting resulting from baffle jetting. Duke Power determined that the debris resulted from three failed fuel rods from one peripheral assembly.
= ,ĭuring the Duke Power Company McGuire-1 end-of-Cycle-3 refueling outage, debris, including loose fuel pellets, were found.
0 kommentar(er)
