QUARTERLY REACTOR TECHNOLOGY REPORT NO. 3 FOR JULY, AUGUST, SEPTEMBER 1957

Technical Report · Fri Oct 31 00:00:00 EST 1958

OSTI ID:4335694

Burnup rate studies were made for dysprosium isotopes as s step in their evaluation as burnable poisons. The variational method was applied to the calculation of flux ratios in repeating slab arrays. Calculated values were compared with measurements made in the Flexible Plastic Reactor. A one- dimensional three-group code was modified to calculate the thermal fluxes obtained from three types of source distribution in a cylindrical reactor having an effective multiplication factor of 0.753. Resonance capture and Doppler effect curves were plotted for slab arrays of U/sup 238/ and H/sub 2/O. A general study of the use of medium-enriched fuel to reduce reactivity changes with life was carried out. The study included buildup and burnout of the U/sup 238/ chain through Pu/sup 241/. The mean slowingdown time was plotted for a pulse of fast neutrons in a subcritical multiplying H/sub 2/O-moderated medium. A number of one-group calculations were completed which show fractional changes in reactivity as a function of depth of insertion of a black central control rod. Other computer studies reported include criticality studies of a rectifier reactor, the effect of europium on the temperature defect of a water moderated thermal reactor, variational studies of resonance escape probability in lattices, and studies of cold water accidents with the SPY code. Further tests were conducted to determine the feasibility of continuous sampling. of unit cell effluent for fuel element failure detection. Results are reported from radiation effects studies of Gd/sub 2/O/sub 3/-stainless steel and Eu/sub 2/O/sub 3/- stainless ste el control materials. Studies of hydrogen diffusion and distribution in tin--zirconium and uranium--zirconium alloys were continued. A new method for measuring gases in reactor primary cooling water is described. (For preceding period see KAPL-1803.) (D.E.B.)

• Research Organization: Knolls Atomic Power Lab., Schenectady, N.Y. Page(s): 76
• DOE Contract Number: W-31-109-ENG-52
• NSA Number: NSA-12-007470
• OSTI ID: 4335694
• Report Number(s): KAPL-1868
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-58
• Country of Publication: United States
• Language: English

Related Subjects

PHYSICS
ACCIDENTS
BREEDING
BURNOUT
BURNUP
CAPTURE
COMPUTERS
CONFIGURATION
CONTROL ELEMENTS
CRITICAL ASSEMBLIES
CROSS SECTIONS
CYLINDERS
DIFFUSION
DISTRIBUTION
DOPPLER EFFECT
ENRICHMENT
EQUATIONS
EUROPIUM
EUROPIUM OXIDES
FAILURES
FAST NEUTRONS
FPR
FUEL ELEMENTS
FUELS
GADOLINIUM OXIDES
GASES
GROUP THEORY
HYDROGEN
INSPECTION
ISOTOPES
LIFETIME
MEASURED VALUES
MULTIPLICATION FACTORS
NEUTRON FLUX
NEUTRONS
PLANNING
PLUTONIUM 241
POISONING
PULSES
QUANTITATIVE ANALYSIS
RADIATION EFFECTS
REACTIVITY
REACTORS
RESONANCE ESCAPE PROBABILITY
RESONANCE NEUTRONS
RODS
SAMPLING
SLOWDOWN
SOLUBILITY
SPECTRAL SHIFT
STAINLESS