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Title: Fission-product afterheat: a review of experiments pertinent to the thermal-neutron fission of $sup 235$U

Technical Report ·
DOI:https://doi.org/10.2172/4428309· OSTI ID:4428309
; ;

Experimental data relating to beta and gamma energy release rates following thermal-neutron fission of /sup 235/U are reviewed. An afterheat function based on these experiments, for after-shutdown times from 1 s to 5 x 10/ sup 5/ s, is proposed and compared with the proposed ANS Standard ANS-5.1; and the uncertainty in the function proposed here is estimated. This proposed function varies between 0.98 and 1.08 times the proposed standard function; the standard deviation is estimated to be between 10% and 15%. (31 figures, 17 tables, 48 references) (auth)

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
US Atomic Energy Commission (AEC)
DOE Contract Number:
W-7405-ENG-26
NSA Number:
NSA-29-002093
OSTI ID:
4428309
Report Number(s):
ORNL-TM-4197
Resource Relation:
Other Information: Orig. Receipt Date: 30-JUN-74
Country of Publication:
United States
Language:
English

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*AFTER-HEAT- FUNCTIONS
*FISSION PRODUCTS- AFTER-HEAT
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ACCURACY
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URANIUM 235