C control rod in severe accident of LWRShirasu, Noriko 
; Kurata, Masaki ; Ogawa, Toru*
In the accident of Fukushima-Daiichi Nuclear Power Plant, degraded fuels containing Zircaloy probably reacted with BC control blades containing stainless steel cladding or blade sheath. Since light elements like B and C are able to react easily with various elements and form various chemical species, several concerns are pointed out, such as variation in volatility and heat generation by oxidation of B and C. The chemical states of degraded fuel were evaluated on the assumption of thermodynamic equilibrium under various conditions of oxygen potential and temperature. The chemical behavior of B affects significantly the variation in oxygen potential with progressing severe accident, and many kinds of volatile compounds are formed by oxidation. The behavior of B causes the changes of volatility of FPs, such as Sr, Cs and Mo.
Language |
: | English |
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Volume |
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Number |
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Pages |
: | 6 Pages |
Publication Year/Month |
: | 2014/09 |
Meeting title |
: | 2014 Water Reactor Fuel Performance Meeting/ Top Fuel / LWR Fuel Performance Meeting (WRFPM 2014) |
Held date |
: | 2014/09 |
Location (city) |
: | Sendai |
Location (country) |
: | Japan |
Paper URL |
: |
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Keywords |
: | thermodynamic evaluation; nuclear severe accident; fission product; B |
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