Sensitivity of the afterheat from /sup 235/U and /sup 239/Pu thermal fission to errors in fission product nuclear data

Conference · Wed Oct 01 04:00:00 EDT 1975 · Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States)

OSTI ID:7291000

Devillers, C ^[1]; Nimal, B; Fiche, C; Noel, J P

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1. CEN de Saclay, Gif-sur-Yvette, France

Calculational results are presented on the decay heat associated with the thermal fission of /sup 235/U and /sup 239/Pu. Calculations are based on the summation of the energies which are released by individual fission products. Two cases have been considered: the first corresponds to one instantaneous fission, the other to a 900 days irradiation time. In both cases the sensitivities of the afterheat to respectively independent yields, half-lives, average beta plus gamma energies of 512 instable fission products have been derived. This information has been used to calculate the afterheat uncertainties from experimental and evaluated nuclear data errors, when available. Results relating to the instantaneous fission of /sup 235/U and /sup 239/Pu are compared to calorimetric measurements between 100 and 10/sup 5/ second cooling time. Errors in the afterheat corresponding to a 900 days irradiation time have been estimated for cooling times ranging from 1 to 1000 seconds which are appropriate for Loss of Coolant Accident analyses in light water reactors. The computer programmes which have been developed can be applied to any irradiation and cooling time condition.

• OSTI ID: 7291000
• Conference Information: Journal Name: Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States) Journal Volume: 1
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
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651722 -- Nuclear Properties & Reactions
A=90-149
Experimental-- Radioactive Decay-- (-1987)
652026 -- Nuclear Properties & Reactions
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Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
AFTER-HEAT
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
ERRORS
EVEN-ODD NUCLEI
FISSION
FISSION PRODUCTS
HADRON REACTIONS
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NEUTRON REACTIONS
NUCLEAR DATA COLLECTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PLUTONIUM 239
PLUTONIUM ISOTOPES
RADIOACTIVE MATERIALS
RADIOISOTOPES
REACTORS
THERMAL FISSION
THERMAL REACTORS
URANIUM 235
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES