High-/sup 240/Pu fuel worth in the Fast Test Reactor Engineering Mockup
Reactivity effects associated with the replacement of low-/sup 240/Pu fuel with high-/sup 240/Pu fuel were calculated and compared to measurements made in the FTR Engineering Mockup Critical (EMC). When the Pu and U isotopic compositions were changed in a way that increased the amounts of /sup 240/Pu and /sup 241/Pu and reduced the amounts of /sup 239/Pu and /sup 238/U while conserving total fissile mass and total fertile mass, the reactivity effect was positive. Calculation-to-experiment bias factors were obtained for this type of change and for the replacement of Fe/sub 2/O/sub 3/ with U/sub 3/O/sub 8/ in subassembly-size zones of the EMC. The k/sub e/--k/sub c/ bias decreased when high-/sup 240/Pu fuel was introduced and increased when Fe/sub 2/O/sub 3/ was replaced with U/sub 3/O/sub 8/. When the two changes were combined, their effects on the k/sub e/ --k/sub c/ bias tended to cancel out. The work described is related to plans for the utilization of light water reactor discharge Pu in the FTR.
- Research Organization:
- Hanford Engineering Development Lab., Richland, Wash. (USA)
- DOE Contract Number:
- E(45-1)-2170
- OSTI ID:
- 7348293
- Report Number(s):
- HEDL-TME-76-31
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
220600* -- Nuclear Reactor Technology-- Research
Test & Experimental Reactors
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
EPITHERMAL REACTORS
EVEN-EVEN NUCLEI
FAST REACTORS
FFTF REACTOR
FUEL CYCLE
FUEL ELEMENTS
HEAVY NUCLEI
ISOTOPE RATIO
ISOTOPES
LIQUID METAL COOLED REACTORS
MOCKUP
MULTIPLICATION FACTORS
NUCLEI
PLUTONIUM 240
PLUTONIUM ISOTOPES
PLUTONIUM RECYCLE
RADIOISOTOPES
REACTIVITY WORTHS
REACTOR COMPONENTS
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
SODIUM COOLED REACTORS
STRUCTURAL MODELS
TEST REACTORS
YEARS LIVING RADIOISOTOPES