IAE R&D Program Progress Report Development Project of Supercritical-water Cooled Power Reactors Overview, Irradiation Test and Mechanical Property Test Shigeki Kasahara Hitachi, Ltd. Toshiba Corp. Hokkaido Univ. Univ. of Tokyo SCPR:S upercritical-water C ooled P ower R eactor
29
Embed
Development Project of Supercritical-water Cooled …silver.neep.wisc.edu/~scw/SCPR.Hitachi.pdf · Development Project of Supercritical-water Cooled Power Reactors Overview, Irradiation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
IAE R&D Program Progress ReportDevelopment Project of Supercritical-water Cooled Power Reactors
Overview, Irradiation Testand Mechanical Property Test
Shigeki Kasahara
Hitachi, Ltd.Toshiba Corp.Hokkaido Univ.Univ. of Tokyo
SCPR:Supercritical-water Cooled Power Reactor
Requirement on the Cladding MaterialsReliability, Durability, and Economy
Coolant flow: Outside of claddings, narrow gap (<1 mm)Bundle, Spacer
Specification
ConfigurationRod pitch9.5 mm
Rod dia. φ8 mm
Cladding
Thickness:0.8mm
Coolant(Supercritical
Water)
Fuel assembly : Dimensional accuracy required↓ ↓
Materials : Low swelling, high creep strength,corrosion resistance necessary
SCPR core environment (1)Neutron spectrum and flux(Case of thermal neutron SCPR: Similar to APWR)
→Fluence (Core)2x1025 n/m2/cycle (LWR)
≈2~3 dpa/cycle(Fe base, Ni base alloy)
⇓Max. damage = 15 dpa
The material database obtained under similar neutron irradiation condition can be applied to the evaluation of candidate materials for the cladding.
Yasteelhi Okano : Conceptual Design of a Supercritical Pressure Light Water Reactor using Double Tube Water Rods: Ph. D. dissertation, The University of Tokyo (1997)
Low Swelling Low radioactivation Good phase stability
DBTT shift(High Temp)
(Precipitates?)
DBTT shift(Low Temp) Improvement required
Low
Ni base alloy (High Ni SUS)
Excellent (B)
Low Swelling
High radioactivation He embrittlement
(Precipitates?)
Good~Excellent*)
Middle~ Expensive
Ti base alloy Good~
Excellent (B)
(Limited DB) Good~Excellent *) Expensive
A: Fossil Fired Plant B: SCWO *)Depend on the chemical compositions and thermal treatment
SummaryLiterature survey
It was almost finished, and the materials for the tests have been selected.
PlanningThe subjects of the development program was clarified.Test matrix of irradiation test and corrosion test were decided.
Preparation of examinationLoop facility for corrosion test was designed and manufactured. The materials for the tests have been purchased.
Irradiation Test (Simulation by electron irradiation)The tests have been started. The materials containing higher Ni tend to suppress the void formation.