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박인규 선문대학교 ·중소기업기술지원연구소 1996 선문공대 연구/기술 논문집 Vol.1 No.1
지난 1994년 11월에 발생한 고리 1호기 증기발생기의 세관 누설에 대한 원인 조사결과, 손상원인은 ODSCC로 밝혀졌다. 즉, 국부적인 염기도 상승과 부식전위 상승에 따른 Caustic ODSCC이다. 약간의 IGA도 관찰되었으나, 결함은 대부분 IGSCC로 나타났다. 이에 따른 단기적인 손상완화 대책으로는 (1) TiO_2 보론산을 첨가한 틈새 세척, (2) TiO_2를 첨가한 하이드라진 담금, (3) Na^+/Cl^- 몰비 조절, (4) 용존산소 제거, (5) T_HOT 감소 등을 들 수 있다. During 1994 unscheduled outage to repair steam generator(S/G) tube leakage, a S/G tube was removed from Kori Unit 1. The results of destructive examinations confirmed the presence of Outside Diameter Stress Corrosion Cracking at locations indicated by the in-service Eddy Current Testing. Remedial measures taken in the field are (i) pH reduction via crevice flushing and molar ratio control (ii) corrosion potential reduction through hydrazine soaking and dissolved oxygen removal, and (iii) T_HOT reduction by power reduction to 85% using auto-mode.
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박인규 선문대학교 2001 공학계열 논총 Vol.4 No.-
증기발생기의 총 누설 한계는 방사능 누출에 따른 10 CFR 100 제한치의 미소량에 국한되어야 한다. 증기발생기 당 누설 제한치는 주증기배관 파열과 LOCA 발생시에도 전열관의 건전성을 확보하는 범위 내에서 설정된다. EPRI 절차에 따른 누설율 분석 평가 결과에 의하면 울진 발전소의 현재 허용 누설율 한계치인10ℓ/hr는 전열관의 건전성을 확보하고 있다. 그러므로 누설율 한계치를 하향 조정할 필요가 없으며, 현재까지의 운전 경험을 바탕으로 독자적인 허용 누설율 기준을 설정하여 운전할 필요가 있다. The total steam generator leakage limit for all steam generators ensures that dosage contribution from the tube leakage will be limited to a small fraction of 10 CFR 100 limits. The leakage limit per steam generator is intended to assure that steam generator tube integrity is maintained in the event of a main steam line rupture or under LOCA conditions. Analytical assessments through EPRI procedures revealed that the present leakage limit of 10 ℓ/hr have assured the steam generator tube integrity of Ulchin nuclear power plant. Therefore it is not necessary to lower the allowable leak rates further but to establish its own allowable leak limits based on the plant operation history.
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박인규,박성학,김태헌,김용주,강덕식,이원호 慶北大學校 醫科大學 1985 慶北醫大誌 Vol.26 No.3
1984년 2월부터 1985년 9월까지 경북대학교 의과대학 부속병원에서 음낭종괴로 초음파 검사를 시행한 환자중 조직학적으로나 임상적으로 확진된 12명을 대상으로 하여 초음파 소견을 분석하여 다음과 같은 결론을 얻었다. 음낭의 고해상력 초음파 검사는 고환의 병변과 고환내 병변을 쉽게 구별할 수 있고, 큰 음낭수종이나 음낭의 동통성 종창으로 인해 이학적 검사를 할 수 없는 고환의 검사와, 초음파 소견을 분석해서 어느 정도 조직학적 진단을 내릴수 있으므로 아주 유용한 검사방법이라 하겠다. Ultrasonograpic studies of twelve patients with scrotal mass histologically or clinically proven at Kyungpook National University Hospital from Feb. 1984 to Sep. 1985 were respectively analized. High-resolution sonography of the scrotum readily distinguished testicular lesions from extratesticular lesions. Sonography is particularly useful in evaluation of the testis, which is obscured by a large hydorcele or painful scrotal swelling.
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국소진행된 두경부암에서 유도화학요법 및 방사선치료의 병용요법과 방사선단독요법의 비교
박인규,박준식 慶北大學校 醫科大學 1992 慶北醫大誌 Vol.33 No.2
In order to determine the efficiency of induction chemotherapy (CT) for unresectable or inoperable, locally advanced head and neck cancer, the authors conducted a retrospective study. Fifty-four patients were treated with CT and radiotherapy (RT) (CT-RT group). This group wad compared with a group of 42 patients treat ed with RT alone(RT alone group). The CT regimens used were CVB(Cyclophosphamide, Vincristine and Bleomycin), CF(Cis-platinum and 5-fluorouracil), CAP(Cyclophosphamide, Adriamycin and Prednisolone) or PVBM(Cis-platinum, Vincristin, Bleomycin and Methotrexate). Toxicity from induction chemotherapy was minimal, and toxicity was United primarily to nausea and vomiting, mucositis, alopecia and myelosuppres-sion. The complete response rate(CR) to CT was 14.8% and the partial response(PR) rate was 48.2% for an overall major response rate of 63%. The major response rate at the completion of locoregional therapy was 88.9% (48/54) with 32CR(59.3%) and 16PR(29.6%) for CT-Rt group and 80.9% (34/42) with 19CR(45.2%) and 15PR(35.7%) for RT alone group(p=0.3387). Median survival was 36 months for CT-RT group and 63 months for RT alone group. The overall survival rate at 2 year, 3 year, 5 year, respectively was 59.9 %, 47.8%, and 41.2% for CT-RT group, and 51.5%, 51.5% and 51.5% for RT alone group(p=0.3838). Comparison between patients in both groups, stratified by overall stage, T and N stage, site and pathology, all failed to show any significant difference in survival rate. We conclude the this retrospective study failed to demonstrate an advantage for induction chemotherapy in unresectable or inoperable locally advanced head and neck cancers.
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박인규 한국중앙영어영문학회 2008 영어영문학연구 Vol.50 No.1
This paper investigates how Korean learners of English produce coronal stop-lateral sequences in words like potluck and padlock, explores what factors can have an effect on their production, and gives a constraint-based account of L2 phonological variations. The main findings are that Korean learners of English transferred coronal stop lateralization, thus turning English coronal stop-lateral sequences to lateral-lateral ones. Vowel epenthesis also occurred. This is attributed to Korean phonological system in which a stop is assumed to appear syllable-initially if it is voiced. Voicing and gender played a role in coronal stop lateralization, and voicing and word boundary had significant effects on vowel epenthesis. These L2 variations could be accounted for by using Davis and Shin (1999)’s constraints and Park (2006)’s *V[-pal, -lab, -low], and by taking up the idea of floating constraints that produce the variable rankings apparent in L2 phonology.
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박인규 圓光大學校 1995 論文集 Vol.30 No.2
3상 전압원 인버터를 위한 개선된 반송과 펄스 폭 변조 방법을 제안한다. 제안하는 방법의 기본 착상은 톱니 반송과 방법에서의 불필요한 1/3의 스위칭을 제거하는 것이다. 이 방법은 (변조율이 클 때의) 잔류 고조파의 최저 주파수가 종래의 삼각 반송파 방법보다 약 50% 더 높으며, 또한 최대 변조 전압도 15% 더 높다. 이 방법은 특히 MOSFET 인버터와 선형궤환 전류 제어에의 적용에 유용할 것으로 기대된다. An improved carrier PWM method for three phase voltage source inverters is proposed. The basic idea of the proposed method is deleting unnecessory 1/3 of switchings in the saw tooth carrier PWM method. The lowest frequency of the remained harmonics of this method (when the modulation index is large) is about 50% higher than that of the triangular carrier method, and also the maximum modulated voltage is about 15% higher. This method is expected to be useful especially in the application to the MOSFET inverters and the linear feedback current control.
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