Contributions of Jyväskylä and Idaho TAGS to FP Decay-Heat Calculations: Their Complementarity and Problems Left Tadashi Yoshida Tokyo Institute of Technology.

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Presentation transcript:

Contributions of Jyväskylä and Idaho TAGS to FP Decay-Heat Calculations: Their Complementarity and Problems Left Tadashi Yoshida Tokyo Institute of Technology IAEA/NDS TAGS Meeting Vienna, Dec , 2014

1) Fission Yields: JEFF-3.1 2) Decay Chains and Branchings: JEFF-3.1 3) Decay Energies : JEFF-3.1 being assumed to be approximately equivalent to ENSDF Following calculations performed based on data files below along with the Jyväskylä & Idaho TAGS Data (E  and E  ) Aggregate FP Decay-Heat Calculations

Define Pandemonity Index Note: Calculations hereafter were carried out based on JENDL FP Decay & Yield Data File 2011

Fig. The top 30 FPs Contributing to U235 Decay Heat at 5 min Cooling after a Fission Green: Idaho TAGS Blue: Jyvaskyla TAGS Brown: On Request List in INDC(NDA)- 0551

From T.Arai, T.Yoshida, Proc. Nucl. Data Symp. 2010, JAEA-Conf , pp

Nuclide Q-Value (MeV) P-Index Fractional Contribution (%) Cooling Time Half-LifeComment Sb min2.34 min Nb-99m min2.6 min  - : 98% Tc min54.2 s I hour52.5 min Sb hour39.5 min Y day10.2 hr Fig. Important FP Nuclides with Large P-Index Contributing at Long Cooling Time after a U-235 Burst Fission (Complemental to the Previous Slide)

600 s

NuclideZA Gamma DH (Mev/Fiss.) Fractional Contribution( %) Cumulative Fraction (%) Half-Life Q-Value (MeV) P-FactorEtot/EgComment Sr E Rb E Kr E m Rb-90m E Y E Rb E Ba E Xe E m Ba E Mo E m Blachot 1991 Y E Cs E Tc E Ce E Sb E m I E m Te E m Cs E Sb-130m E m beta 100% Te-133m E m Tc E La E Y-93m E s0.76 inapplicabl e 1.1I.T. 100% Nb-99m E m beta 98% Sb E m Sn-129m E m beta 100% Sb E Br E m La E Sb-132m E m beta 100% Fig. The top 30 FPs Contributing to U233 Gamma DH at 10 min after a Fission Burst Green: Idaho TAGS Blue: Jyvaskyla TAGS Brown: On Request List in INDC(NDA)-0551

600 s

NuclideZA Gamma DH (Mev/Fiss.) Fractional Contribution (%) Cumulative Fraction (%) Half-Life Q-Value (MeV) P-FactorEtot/EgComment Sr E Rb E Y E Rb E Mo E m Kr E m Xe E m Ba E Tc E Rb-90m E Ba E Y E Te E m Cs E Sb E m Tc E Sb E m Ce E Sb E m Te E Cs E Sb-130m E m Sb-132m E m Te-133m E m Nb-99m E m I E m Y-93m E m0.76 inapplicabl e 1.1 IT, 95Sr:7.4m Sb E m La E La E Fig. The top 30 FPs Contributing to U235 Gamma DH at 10 min after a Fission Burst Green: Idaho TAGS Blue: Jyvaskyla TAGS Brown: On Request List in INDC(NDA)- 0551

600 s

NuclideZA Gamma DH (Mev/Fiss.) Fractional Contribution( %) Cumulative Fraction (%) Half-Life Q-Value (MeV) P-FactorEtot/EgComment Tc E Sr E Mo E m Tc E Y E Xe E m Ba E Tc E Ba E Cs E Sb E m Sb E m Rb E I E m Te E m Rh E s Ru:4.55 m Y E Sb-132m E m Sb-130m E m Ce E Rb-90m E Rb E Cs E m Kr E m Te-133m E m Nb-99m E m Ru E m Sb E m Sb E m Te E m Fig. The top 30 FPs Contributing to Pu-239 Gamma DH at 10 min after a Fission Burst Green: Idaho TAGS Blue: Jyvaskyla TAGS Brown: On Request List in INDC(NDA)- 0551

Recoverable Fission Energy K.E. of Fission fragment : 168 MeV Fission Neutron : 5 MeV Prompt Gamma : 7 MeV Delayed Gamma : 7 MeV Beta : 8 MeV Total 195 MeV Fission Gamma-Ray Spectrum from Operating Reactors

Thank you for Your Attention