2805 高速炉の直管型2重管蒸気発生器管板の熱応力評価 : (2)大規模詳細熱応力解析(S10-2 熱応力(2),S10 熱応力,応力特異性と強度評価)

概要

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A new concept of double-wall-tube steam generator (SG) is being introduced and investigated as an innovative technology to realize next-generation sodium-cooled fast breeder reactors (FBRs) for commercialization. This new concept is posing great challenges in the engineering design of a tubesheet which must bundle over 7000 double-wall tubes under severe mechanical and thermal loads. R & D efforts concerning the development of a feasible design and establishment of design-by-analysis methods for the new-concept tubesheet structure have been begun at JAEA. As a first step, an attempt at identifying the high stress locations and their magnitudes through large-scale numerical simulations using Geometrical models in accord with reality are reported.
2007-09-07