방사선 치료용 MM-22 의학용 마이크로트론 가속기

이동훈,박주식,Lee Dong-Hun,Bak Joo-Shik 대한방사선치료학회 1990 大韓放射線治療技術學會誌 Vol.4 No.1

The MM-22 medical microtron at Korea Cancer Center Hospital has been running for radiotherapy since it was installed in 1986. The microtron is a very flexible radiation therapy device with excellent radiation field for photon or electron therapy. The microtron accelerates elections from an energy of minimun 5.3MeV to an energy of maximum 22.5MeV. The electrons are led from the microtron to the treatment head via a beam transport system and are used for radiotherapy. Present paper describes the system structures and operating characteristics of the MM-22 microtron and its therapy unit.

Dosimetric Characteristics of the KCCH Neutron Therapy Facility

류성렬,노성우,정현우,조철구,고경환,박주식,줄리 인마,Yoo Seong Yul,Noh Sung Woo,Chung Hyun Woo,Cho Chul Koo,Koh Kyoung Hwan,Bak Joo Shik,Eenmaa Juri The Korean Society for Radiation Oncology 1988 Radiation Oncology Journal Vol.6 No.1

한국에너지연구소 원자력병원 싸이클로트론에 의해 생산되는 중성자를 임상에 적용시키기 위해, 이의 물리적 특성을 알기 위하여 방사선선량 측정실험을 시행하였다. 여기서 얻은 결과를 외국의 다른 치료기관에서 얻은 데이타와 비교 분석하였다. 중심축 선상의 심부선량백분율, build-up곡선, open과 쐐기등선량 곡선의 값이 4MV와 6MV X-ray값의 중간에 위치하였다. 최대선량의 build-up은 피부아래 1.35cm에 위치했으며 입사 선량은 약 $40\%$였다. 출력인자는 $6\times6cm$의 조사야에서 0.894, $30\times30cm$의 조사야에서는 1.187이었다. 중성자선의 X-ray오염도는 $10\times10cm$ 조사야에서 심부 2cm에서 $4.9\%$였다. For the physical characterization of neutron beam, dosimetric measurements had been performed to obtain physical data of KCCH cyclotron-produced neutrons for clinical use. The results are presented and compared with the data of other institutions from the literatures. The central axis percent depth dose, build-up curves and open and wedge isodose curve values are intermediate between that of a 4 and 6 MV X-rays. The build-up level of maximum dose was at 1.35cm and entrance dose was approximately $40\%$. Flatness of the beam was $9\%$ at Dmax and less $than{\pm}3\%$ at the depth of $80\%$ isodose line. Penumbra begond the $20\%$ line is wider than corresponding photon beam. The output factors ranged 0.894 for $6\times6cm$ field to 1.187 for $30\times30cm$ field. Gamma contamination of neutron beam was $4.9\%$ at 2 cm depth in $10\times10cm$ field.

KSTAR 헬륨냉동기의 압축시스템 시운전 결과

박동성(Dong-Seong Park),장현식(Hyun-Sik Chang),주재준(Jae-Joon Joo),문경모(Kyung-Mo Moon),조광운(Kwang-Woon Cho),김양수(Yang-Soo Kim),박주식(Ju-Shik Bak),권일근(Il-Keun Kwon),조면철(Myeon-Chul Cho),양승한(Seung-Han Yang) 대한설비공학회 2008 대한설비공학회 학술발표대회논문집 Vol.2008 No.2

The main components of the KSTAR helium refrigeration system (HRS) can be classified into the warm compression system (WCS) and the cryogenic devices according to the operating temperature levels. The WCS itself consists of the compressor station (C/S) and the oil removal system (ORS). The process helium is compressed from 1 bar to 22 bar maximum in the C/S and downstream, the ORS removes the oil mixed in the helium to less than 10 ppbw as per the operation criteria of the cryogenic devices of the KSTAR HRS. After the installation, the pre-commissioning and commissioning activities were started on July, 2007. Before the start-up of the C/S, vibration measurement and the skid reinforcement jobs were performed for stable operation of the C/S. The results of the WCS performance tests met the requirements of the KSTAR HRS but satisfied the vibration level criteria only at the compressors’ full load condition.

Dosinetric Characteristics of the KCCH Neutron Therapy Facility

Seoug Yul Yoo(류성렬),Sung Woo Noh(노성우),Hyun Woo Chung(정현우),Chul Koo Cho(조철구),Kyoung Hwan Koh(고경환),Joo Shik Bak(박주식),Juri Eenmaa(줄리 인마) 대한방사선종양학회 1988 Radiation Oncology Journal Vol.6 No.1

한국에너지연구소 원자력병원 싸이클로트론에 의해 생산되는 중성자를 임상에 적용시키기 위해, 이의 물리적 특성을 알기 위하여 방사선선량 측정실험을 시행하였다. 여기서 얻은 결과를 외국의 다른 치료기관에서 얻은 데이타와 비교 분석하였다. 중심축 선상의 심부선량백분율, build-up 곡선, open과 쐐기둥선량 곡선의 값이 4MV와 6MV X-ray값의 중간에 위치하였다. 최대선량의 build-up은 피부아래 1.35cm에 위치했으며 입사 선량은 약 40%였다. 출력인자는 6×6cm의 조사야에서 0.894, 30×30cm의 조사야에서는 1.187이었다. 중성자선의 X-ray 오염도는 10×10cm 조사야에서 심부 2cm에서 4.9%였다. For the physical characterization of neutron beam, dosimetric measuraments had been performed to obtain physical data of KCCH cyclotron-produced neutrons for clinical use. The results are presented and compared with the data of other institutions from the literatures. The central axis percent depth dose, build-up curves and open and wedge isodose curve values are intermediate between that of a 4 and 6 MV X-rays. The build-up level of maximum dose was at 1.35cm and entrance dose was approximately 40%, Flatness of the beam was 9% at Dmax and less than± 3% at the depth of 80% isodose line. Penumbra begond the 20% line is wider than corresponding photon beam. The output factors ranged 0.894 for 6×6cm field to 1.187 for 30×30cm field. Gamma contamination of neutron beam was 4.9% at 2cm depth in 10×10cm field.

KSTAR 토카막용 저온용기 개발

허남일(Nam-il Her),김병철(Byung-chul Kim),홍권희(Kwen-hi Hong),김근홍(Geun-hong Kim),신훈(Hoon Shin),박경호(Kyung-ho Park),박주식(Joo-shik Bak) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11

KSTAR cryostat is a 8.8 m diameter vacuum vessel that provides the necessary thermal barrier between the ambient temperature test cell and the supercritical helium cooled superconducting magnet providing the base pressure of 1 x 10-3 Pa. The cryostat is a single walled vessel consisting of central cylindrical section and two end closures, a flat base structure with external reinforcements and a dome-shaped lid structure. The base structure has 8 equally spaced support legs anchored on the concrete base. The cryostat vessel design was executed to satisfy the performance and operation requirements. The major loads considered in the structural analysis were vacuum pressure, dead weight, electromagnetic load driven by plasma disruption, and seismic load. Based on the fabrication and inspection procedures for the vessel, cryostat vessel was fabricated and inspected. It was confirmed that the inspection results were acceptable.

KCCH Medical Cyclotron Operation for Neutron Therapy and Isotope Production (1989) : - A Technical Report -

Kim,Byung-Mun,Kim,Young-Sear,Bak,Joo-Shik,Lee,Jong-Du,Yoo,Seong-Yul,Koh,Kyung-Hwan 대한방사선 방어학회 1990 방사선방어학회지 Vol.15 No.2

원자력병원에 설치된 MC-50의학용 싸이클로트론은 4년간의 장비 도입 계획, 장비 인수 및 설치 그리고 빔 특성조사를 거쳐서 1986년 11월부터 가동을 시작하였다. MC-50싸이클로트론은 현재 중성자 치료 및 방사성 동위원소 생산에 이용되고 있다. 1989년 12현재, 중성자선 치료는 총 179명(1852 sessions)의 환자에서 시행되었다. 핵의학 분야에 이용되는 방사성 동위원소의 생산은 표적운반, 표적용융, 빔 진단 그리고 화학적 처리과정에 관한 문제들을 해결하기 위한 다각적인 연구를 거친 수 1989년 3월부터 시작하였다. 이 논문은 중성자 치료와 동위원소 생산에 이용된 MC-50싸이클로트론의 운영 현황 및 장비의 특서에 대하여 기술하였으며, 또한 1989년도의 운영결과 및 제반 문제점들을 요약하였다. 1989년도 총 운전시간은 1252.5시간이었으며 이 중 중성자 치료에 400시간을 이용하였다(599 sessions). 동위원소 생산에는 832.5시간을 이용하여 총 1695mCi(Ga-67 : 1478mCi, Tl-201 :107 mCi, I-123 : 23mCi, In-111 :85mCi)를 생산하였다. 빔 특성실험 및 기타 연구에는 20시간을 이용하였다. 1989년도의 가동율은 88.2%이었으며 전년도의 71.0%에 비하여 현저히 향상되었다. After four years of planning, equipment acquisition, facility construction and beam testing, the KCCH cyclotron facility was put into operation in November 1986. Now the KCCH cyclotron(MC-50) has been used for four years in neutron therapy and radioisotope production. Up to December 1989, 179(1852 sessions) patients have undergone neutron therapy. Radioisotope production for nuclear medicine use was started from March 1989 after extensive work to overcome target transport, target melting, beam diagnostic and chemical processing problems-This status report introduces the cyclotron facility, and the experiences of neutron therapy and isotope production with the MC-50 cyclotron. Besides, the operation results and the general troublesof the MC-50 during 1989 are summarized. Total operation time was 1252.5 hours. Four hundred hours were used for neutron therapy of 599 treatment sessions and 832.5 hoursfor radioisotope production. Total amount of produced raioisotope was 1695 mCi(Ga-67 : 1478 mCi, Tl-201 : 107 mCi, 1-123 : 25 mCi, In-111:85 mCi). Twenty hours were used for scheduled beam testing. In 1989, 88.2% of the planned operation were performed on schedule snd this rats is improved remarkably compared to 71.0% in 1988.