Induced nuclear reactions: processes – systems – and elements – Fuel component structure – Plural fuel segments or elements
Patent
1986-09-17
1987-10-06
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
Fuel component structure
Plural fuel segments or elements
376438, 376443, G21C 334
Patent
active
046982043
ABSTRACT:
A BWR fuel assembly having an array of spaced fuel rods, an outer tubular flow channel surrounding the fuel rods to direct flow of coolant fluid therealong, and a central water cross extending through the channel and dividing the fuel rods into separate subassemblies which each has fuel rod support spacers being displaced from one another along the length of the subassembly, includes features in each subassembly which minimize degradation of CHF performance. These features relate to intermediate flow mixing nonsupport grids disposed along each subassembly between and in spaced relation from the uppermost pairs of the spacers. The grid includes first and second groups of mixing vanes disposed at its downstream side. The vanes of the first group are attached on portions of the outer strap and on respective portions of the inner straps which together with the outer strap portions define the perimeter cell openings. The vanes of the second group are attached on other portions of the inner straps which together with the respective portions thereof define the inner cell openings. Each mixing vane of both groups extends downstream and inwardly toward the respective cell openings for deflecting coolant flowing therethrough. The mixing vanes of the second group are substantially smaller in size than those of the first group so as to generate substantially less turbulence in coolant flow through the inner cell openings than through the perimeter cell openings.
REFERENCES:
patent: 3933584 (1976-01-01), Litt
patent: 4039379 (1977-08-01), Patterson
patent: 4061536 (1977-12-01), Creagan
patent: 4125434 (1978-11-01), Fromel
patent: 4578239 (1986-03-01), Steinke
patent: 4585616 (1986-04-01), DeMario
patent: 4649021 (1987-03-01), Taleyarkhan
Walsh Donald P.
Westinghouse Electric Corp.
LandOfFree
Intermediate flow mixing nonsupport grid for BWR fuel assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Intermediate flow mixing nonsupport grid for BWR fuel assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intermediate flow mixing nonsupport grid for BWR fuel assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2116452