Decay heating measurements and calculations for irradiated /sup 235/U, /sup 233/U, /sup 239/Pu, and /sup 232/Th (LWBR Development Program)

Gunst, S B; Conway, D E; Connor, J C

Title: Decay heating measurements and calculations for irradiated /sup 235/U, /sup 233/U, /sup 239/Pu, and /sup 232/Th (LWBR Development Program)

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Abstract

Samples of /sup 235/U, /sup 233/U, /sup 239/Pu and /sup 232/Th have been irradiated in high neutron fluxes (>10/sup 14/ n/cm/sup 2/-sec) and their decay heatings have been measured as functions of cooling time from 14 hours to 4500 hours after removal from the high flux. To measure the rate of heat emission, an underwater calorimeter has been developed. For the measured exposure histories, decay heatings have also been calculated for the concentrations of 190 fission products, all significant heavy isotopes, and structural nuclides. Account is taken of the energy carried by gamma rays that escape the calorimeter. Measurements and calculations of the decay heating captured within the calorimeter agree within two standard deviations for all samples and cooling times and, in general, agree within 2%. For the /sup 235/U sample, calculations based on the Proposed ANS Standard ANS-5.1 agree with the measurements within a few percent. 17 references. (NSA 30: 34244)

Authors:: Gunst, S B; Conway, D E; Connor, J C

Publication Date:: Mon Jul 01 00:00:00 EDT 1974

Research Org.:: Bettis Atomic Power Lab., Pittsburgh, PA (USA)

OSTI Identifier:: 6719235

Report Number(s):: WAPD-TM-1183

DOE Contract Number:: AT(36-1)-GEN-14

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

Subject:: 22 GENERAL STUDIES OF NUCLEAR REACTORS; PLUTONIUM 239; AFTER-HEAT; THORIUM 232; URANIUM 233; URANIUM 235; CALORIMETRY; LWBR TYPE REACTORS; ACTINIDE ISOTOPES; ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; BREEDER REACTORS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HEAVY NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MINUTES LIVING RADIOISOTOPES; NUCLEI; PLUTONIUM ISOTOPES; RADIOISOTOPES; REACTORS; THERMAL REACTORS; THORIUM ISOTOPES; URANIUM ISOTOPES; WATER COOLED REACTORS; WATER MODERATED REACTORS; YEARS LIVING RADIOISOTOPES; 220100* - Nuclear Reactor Technology- Theory & Calculation

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                    Gunst, S B, Conway, D E, and Connor, J C. Decay heating measurements and calculations for irradiated /sup 235/U, /sup 233/U, /sup 239/Pu, and /sup 232/Th (LWBR Development Program).  United States: N. p., 1974. 
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                    Gunst, S B, Conway, D E, & Connor, J C. Decay heating measurements and calculations for irradiated /sup 235/U, /sup 233/U, /sup 239/Pu, and /sup 232/Th (LWBR Development Program).  United States.

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                    Gunst, S B, Conway, D E, and Connor, J C. 1974.  
        "Decay heating measurements and calculations for irradiated /sup 235/U, /sup 233/U, /sup 239/Pu, and /sup 232/Th (LWBR Development Program)".  United States.

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@article{osti_6719235,

  title        = {Decay heating measurements and calculations for irradiated /sup 235/U, /sup 233/U, /sup 239/Pu, and /sup 232/Th (LWBR Development Program)},

  author       = {Gunst, S B and Conway, D E and Connor, J C},

  abstractNote = {Samples of /sup 235/U, /sup 233/U, /sup 239/Pu and /sup 232/Th have been irradiated in high neutron fluxes (>10/sup 14/ n/cm/sup 2/-sec) and their decay heatings have been measured as functions of cooling time from 14 hours to 4500 hours after removal from the high flux. To measure the rate of heat emission, an underwater calorimeter has been developed. For the measured exposure histories, decay heatings have also been calculated for the concentrations of 190 fission products, all significant heavy isotopes, and structural nuclides. Account is taken of the energy carried by gamma rays that escape the calorimeter. Measurements and calculations of the decay heating captured within the calorimeter agree within two standard deviations for all samples and cooling times and, in general, agree within 2%. For the /sup 235/U sample, calculations based on the Proposed ANS Standard ANS-5.1 agree with the measurements within a few percent. 17 references. (NSA 30: 34244)},

  doi          = {},

  url          = {https://www.osti.gov/biblio/6719235},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Mon Jul 01 00:00:00 EDT 1974},

  month        = {Mon Jul 01 00:00:00 EDT 1974}

}

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