A comprehensive assessment of safety related core design information needs was conducted. A basic hypothesis was that core performance under off-design and accident condirions will affect rhe choice of core design parameters. The konomic consequences of fuel failure effects and random accidents were compared with fault tree results based on a "mean-annualtost " concep t. I t is concluded that fuel failure effects dominate the expected cost penalties. Principal development r e c o m m m~n s are for integral tests of: 1) fuel failure propagation and 2) loss-ofcooling consequences. GEAP 13639 3. Mechanical perturbations in excess of design loads. Three basic loading mechanisms considered were excess spacer contact loads, bending loads due to spacer restraint, and shock pulse loads.
Superheat Average Gap for the Reference Case as a Function of Time and Gap Coefficient. .. . Comparison of Mid-Plane Temperatures w ii Fu~~ction of Timc and Gnp Conductance. 14 Clad Temperature as a Function of Time and Axial Position for the Reference Case. .
Telephone: (703) 487-4650 A-6001-400.2 <09/94) UEF256 I SUPPORTING DOCUMENT I 1. Total Pages 28 2. T i t l e Tank SY-101 Void Fraction Instrument Functional Design Criteria 5. Key Words 3. Number 4 . Rev No. Organization/Charge Code e NZBH3 7. Abstract T k 4 This document presents the functional design criteria for design, analysis, fabrication, testing, and installation o f a void fraction instrument for Tank I SY-101. This instrument will measure the void fraction in the waste in Tank SY-101 ABSTRACT This document presents the functional design criteria for design, analysis, fabrication, testing, and installation o f a void fraction instrument for use on Tank SY-101. The void fraction instrument will determine the compressible gas fraction of the waste in Tank SY-101 at various elevations. It will be installed in a 4-inch penetration riser and be provided with a decontamination spray system for cleanup upon removal. a d
The Experimental Breeder Reactor No. 11 (EBR-II) irradiation test Uninstrumented Fueled Accelerated (UFAC)-l of seven encapsulated thermionic test pins was analyzed with the code COBRA-SFS. The model predicted coolant and material temperatures for three conditions of interest: Steady state full power, response to the unlikely loss of flow transient, and decay heat cooling by forced down flow of argon. Modeling assumptions and a summary of results are included.
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