MATERIALS TESTING REACTOR-ENGINEERING TEST REACTOR TECHNICAL BRANCHES QUARTERLY REPORT (FOR) OCTOBER 1-DECEMBER 31, 1959
As steps toward the eventual full experiment loading of the ETR, two loading arrangements of fuel elements containing 320 and 400 g U/sup 235/ were investigated in the ETRC. An improved coolant flow alarm-scram system for ETR using a band pass amplifier and differential pressure transducers has demonstrated its ability to maintain protection of the reactor, yet avoid nuisance scrams. Response of the RMF's servo-ionization chamber to gamma rays from a 400-curie in source in the experiment position was found to be less than 0.1% of the response to neutron flux at power. A comparison of burnup estimates in sample fuel plates based on RMF measurements to those based on destructive isotopic distribution analyses show very good agreement. The self-shielding factor for 40 mil Co wire for three MTR facilities was found to be 1.18 while resonance neutron self-shielding factor was found to be 2.20. The Cd ratio (fission) for U/sup 235/ was found to be 10.5 for 10 mil U-Al, based on measurements in four ETRC fuel positions. In the cross section measurement program, simultaneous total and fission cross section measurements on U/sup 233/ with the fast chopper were completed for the 16 m flight path, and the resonance parameters obtained from a multilevel analysis are presented. A value of 211 combination rat 5 barns was obtained for the 2200 m/sec cross section of Pu/sup 231/. Preliminary results were obtained in the determination of alpha for U/sup 235/ in a well thermalized spectrum. The isomer yield ratios for epi-Cd and thermal neutron capture in In/sup 115/, Cs/sup 133/, Ta/sup 181/ and Eu/sup 151/ were measured. Addition al measurements were made of the decay of 15 day Eu/sup 156/ and the decay scheme was revised accordingly. Further measurements on radiations following decay of Sm/sup 155/ have resulted in a revision of previous assignments of nuclear spins for the levels in Eu/sup 155/. (For preceding period see IDO-16580.) (W.L.H.)
- Research Organization:
- Phillips Petroleum Co. Atomic Energy Div., Idaho Falls, Idaho
- DOE Contract Number:
- AT(10-1)-205
- NSA Number:
- NSA-14-018711
- OSTI ID:
- 4142578
- Report Number(s):
- IDO-16620
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- United States
- Language:
- English
Similar Records
MATERIALS TESTING REACTOR-ENGINEERING TEST REACTOR TECHNICAL BRANCHES QUARTERLY REPORT, APRIL 1-JUNE 30, 1960
MATERIALS TESTING REACTOR-ENGINEERING TEST REACTOR TECHNICAL BRANCHES QUARTERLY REPORT, JANUARY 1-MARCH 31, 1961
Related Subjects
ALUMINUM- AMPLIFIERS- BURNUP- CADMIUM- CADMIUM RATIO- COOLANTS- CRITICAL ASSEMBLIES- DISTRIBUTION- ETR- ETRC- FUEL ELEMENTS- GAMMA RADIATION- GAMMA SOURCES- IONIZATION CHAMBERS- ISOTOPES- MATERIALS TESTING- MEASURED VALUES- MONITORING- NEUTRON FLUX- NEUTRONS- PERFORMANCE- PLATES- PRESSURE- REACTIVITY- REACTOR FUELING- REACTOR SAFETY- REACTORS- RESEARCH REACTORS- RESONANCE NEUTRONS- RMF- SHIELDING- SHUTDOWN- SPECTRA- URANIUM 235
BETA DECAY- ENERGY LEVELS- EUROPIUM 155- EUROPIUM 156- HALF- LIFE- MEASURED VALUES- SAMARIUM 155- SPIN
CAPTURE- CESIUM 133- CROSS SECTIONS- EPITHERMAL NEUTRONS- EUROPIUM 15