THE LID TANK SHIELDING FACILITY AT OAK RIDGE NATIONAL LABORATORY. PART II. DETERMINATION OF THE FISSION RATE OF THE SOURCE PLATE
BS>Following the installation of the second Lid Tank Shielding Facility source plate, a thin uranium disk identified as SP-2, a series of experiments were performed to determine its fission rate. Three independent methods were used one based on the rate of absorption of the thermal neutrons incident on the plate, another based on the rate of fast-neutron production within the plate, and a third one based on the power dissipation within the plate. Discussions of the methods, all of which yielded consistent results, are presented, along with a description of the source plate. A weighed average of the fission rates determined by the three methods gave a result of 1.66 x 10/sup 11/ fissions/sec plus or minus 5% for the standard incident thermal-neutron flux. With an assumed energy dissipation of 200 Mev/fission a typical reactor having tbis fission rate would release 5.22 watts of heat power. The calibration of the SP-2 allowed a re-evaluatjon of the power of the first LTSF source plate, the SP-1. The revised effective'' neutron power for SP-1 is 1.7 watts plus or minus 11%. (auth)
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-13-018236
- OSTI ID:
- 4260525
- Report Number(s):
- ORNL-2350
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- United States
- Language:
- English
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