報告書番号

U87028

タイトル（和文）

地下式原子力発電所の立地評価－横型方式のレイアウトと調査試験の例示－

タイトル（英文）

SITING ESTIMATION OF UNDERGROUND NUCLEAR POWER PLANT -LAYOUT AND EPLORATION FOR UNDERGROUND NUCLEAR POWER PLANT OF TUNNEL TYPE CAVERNS

概要 （図表や脚注は「報告書全文」に掲載しております）

原子力発電所の在来地上立地は，用地難から早晩非常に困難になることが予想され，新立地方式の確立が長期の電力需要より極めて重要な課題となる。すでに，新立地方式の一つである地下立地方式について，立地に際して耐震設計上必要となる各種調査，試験，解析，安定性評価の一連の手法の提案を行い，将来の建設時の立地技術評価のための手引きの資料を作成した。本研究は，上記研究成果に基づき仮想地点を選定し，ケーススタディーとして具体的な立地評価手法の例示を行い，立地評価技術の体系化を図るものであり，本報告では，レイアウトおよび調査試験の例示について述べた。仮想立地の選定にては，我が国の一般的な山岳地形に多い２種類の地形を設定し，それら地点の成立性を評価後，横型全地下式，横型部分地下式のレイアウトを設定した。さらに，地質調査，原位置試験，地圧測定結果について例示した。

概要 （英文）

IT IS URGENT TO ESTABLISH NEWLY DEVELOPED NUCLEAR POWER PLANT SITING METODS SUCH AS UNDERGROUND SITING,GUATERNARY GROUNG SITING OR OFF-SHORE SITING. IN THE COMPREHENSIVE PAPER NO.UOL SITING EXPLORATION AND SEISMIC STABILITY ESTIMATION OF UNDERGROUND NUCLEAR POWER PLANT ,WE PRESENTED THE METHODS OF EXPLORATION AND SEISMIC STABILITY ESTIMATION OF UNDERGROUND NUCLEAR PLANT . THIS REPORT IS A COMPANION VOLUME TO THE COMPREHENSIVE REPORT AND DISCRIBES TWO EXAMPLES OF LAYOUT AND TECHNICAL EVALUTION OF ROCK FOUNDATION FOR UNDERGROUND NUCLEAR POWER PLANT WITH TWO MODEL SITES WHICH WE MADE IMAGINARITY. TWO EXAMPLES OF THE LAYOUT INCLUDE THE CASE OF A FULL UNDERGROUND PLANT SYSTEM (COSE NO.1) FOR A SITE WITH STEEP SLOPE AND THE OTHER CASE OF A PARTIALLY UNDERGROUND PLANT SYSTEM (CASE NO.2) FOR A SITE WITH MODERATE SLOPE. IN THE LAYOUTS,WE HAVE INTENDED TO OBTAIN MODERATE DISTANCE AND SIZES OF MAIN CAVERNS. IN THE CASE OF THE SITE WITH STEEP SLOPE,GEOLOGICAL INFORMATION WAS OBTAINED BY DRILLING CORES OF FOURTEEN BORELING HOLES AND BY EXPLORATION OF TWO ADITS. AS THE RESULTS OF THE SURVEY,THE ROCK FOUNDATION AROUND THE MAIN CAVERN WERE CLEARED TO BE CONSISTED OF HARD GRANITE (CH CLASS).BUT,THERE EXISTED TWO FAULTS AROUND THE MAIN CAVERN.THE MECHANICAL PROPERTIES OF ROCK FOUNDATION AROUND MAIN CAVERS WERE EVALUTED BY IN-SITU TESTS IN THE ADIT (E.L.70M). AS THE RESULT OF THESE TESTS,THE PROPERTIES OF THE ROCK FOUNDATION AROUND THE MAIN CAVERN WERE ESTIMATED AS FOLLOWS. YOUNG S MODULUS:E=10 20*10000(KGF/SQUARE CM) SHEAR STRENGHT:C=20+SIGMA TAN(56)(KGF/SQUARE CM) THE MAGNITUDE OF THE INITIAL ST RESS WAS NEARLY EQUAL TO THE DEAD WEIGHT OF THE ROCK FOUNDATION OVERLAYING THE MAIN CAUERN.

報告者

キーワード