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Development of In-Core Fuel Management Scoping Tools for PWR
Kim, Chang-Hyo,Kim, Teak-Kyum Korean Nuclear Society 1993 Nuclear Engineering and Technology Vol.25 No.1
This paper concerns with developing a simplified in-core fuel management scoping tool for PWR. For this purpose the point reactivity model is put into a fuel cycling decision code, FCYPRM. Modified Borresen's coarse-mesh diffusion theory and nodal expansion method are utilized to form a spatial neutron analysis code, CMSNAP. Numerical experiments are per- formed to determine a set of empirical shuffling rules for working out an automated fuel loading pattern search code, ALPS. The numerical examples are presented for verifying effectiveness and applicability of individual codes. By structuring and applying three codes for reload core design problem of a PWR, it is demonstrated that these codes provide an effective in-core fuel management scoping tool for PWR.
새만금 간척지에서 토양 염농도별 동계 사료작물의 생육 및 수량
백남현 ( Nam Hyun Back ),김택겸 ( Teak Kyum Kim ),양창휴 ( Chang Hyu Yang ),김선 ( Sun Kim ),남정권 ( Jeong Kwon Nam ),이상복 ( Sang Bok Lee ),최원영 ( Weon Young Choi ),김시주 ( Si Ju Kim ),이경보 ( Kyong Bo Lee ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.4
To examine the possibility of cultivation of winter fodder crops at Saemangeum reclaimed land, barley, rye, wheat, triticale, and oat were cultivated under the various ranges of saline soils from autumn 2009 to the spring 2011, and their growth and yields were evaluated. emergence and seedling stand rate were 84 and 79% at non-salinity soil plot, 64 to 73% at 0.2% saline soil plots, 40 to 52% at 0.3% saline soil plots, and 22 to 37% at 0.4% saline soil plot, respectively. those of rye, wheat, triticale, and barely were similar, however those of oats were relatively low. Yields of fresh and dry matter were 66 to 77% level at 0.2% saline soil plot and 30 to 61 % level at over 0.3% saline soil plots compared with the yields at non-saline soil plot. Fresh matter were high in order of rye>wheat>barely>triticale>oat. and dry matter were high in order of wheat>rye=barley>tricale>oat. Thus, considering these results, Soil salinity below 0.2% were available to cultivation of winter fodder corps and rye, wheat, barely and triticale were available crops in Saemangeum recalimed land.
연구보문 : 호남지역 전북통에서 벼 부분경운 건답직파시 강우 후 파종작업 가능일수
백남현 ( Nam Hyun Back ),김택겸 ( Teak Kyum Kim ),고종철 ( Jong Cheol Ko ),남정권 ( Jeong Kwon Nam ),최민규 ( Min Kyu Choi ),김선 ( Sun Kim ),양창휴 ( Chang Hyu Yang ),김영두 ( Yong Doo Kim ),김시주 ( Si Ju Kim ) 한국국제농업개발학회 2010 韓國國際農業開發學會誌 Vol.22 No.4
호남지역 전북통(미사질양토)에서 벼 부분경운 건답직파시 강우 후 파종작업 가능일수를 구명하기 위하여 2000~2001년에 걸쳐 국립식량과학원 벼맥류부 벼 시험포장에서 동력분무기를 이용하여 강우량을 달리 처리한후 경과일수에 따른 토양수분, 쇄토율, 입모 및 쌀 수량 등을 검토한 결과를 요약하면 다음과 같다. 1. 미사질양토에서 강우 후 토양수분함량이 35%이하로 낮아질 때까지의 소요일 수는 강우량 5mm일 때 6일, 10mm 및 15mm일 때 9일, 20mm일 때 12일, 30mm일 때는 15일 이후였다. 2. 토양수분함량이 26.3~34.5%에서는 쇄토율이 58~82%, 입모수가 88~162개/m2이었으나, 토양 수분함량이 36.6%에서는 쇄토율이 52%, 입모수가 80개/m2이었다. 3. 쌀 수량은 토양수분함량이 26.3~34.5%에서는 별 차이가 없었으나, 토양수분함량이 36.6%에서는 m2당 수수 및 립수가 적어 쌀 수량이 현저히 감소하였다. 4. 따라서 호남지역 전북통(보통답)에서 부분경운 건답직파시 강우 후 파종작업 가능일수는 토양수분함량, 쇄토율, 입모, 벼 생육 및 쌀 수량 등을 종합해 볼 때 강우량 5mm일 때 4~5일, 강우량 10mm일 때 6~7일, 15mm일 때 8~9일, 20mm일 때 12일, 30mm일 때 15일이었다. To establish the system of partial-tillage direct seeding cultivation of rice in Honam Plain Area, we investigated the related factors such as possible days of seeding work and limitation of soil moisture after rainfall. This experiment was conducted in Jeonbuk series(fluvio marine alluvial soil) at National Institute of Crop Science in Iksan from 2000 to 2001. For the proper harrowing practice and acceptable rice seedling stand rate under partial-tillage direct seeding cultivation, the higher limit of soil moisture content after rainfall was determined below 34.5 %. To reach the available seeding day after rainfall in which soil moisture dropped below 34.5 %, 4-5 days was required at 5mm rainfall, 6-7 days at 10mm, 8-9 days at 20mm, and 15 days at 25mm, respectively.