EXTENDED DRY STORAGE OF USED NUCLEAR FUEL: TECHNICAL ISSUES: A USA PERSPECTIVE

Mcconnell, Paul,Hanson, Brady,Lee, Moo,Sorenson, Ken Korean Nuclear Society 2011 Nuclear Engineering and Technology Vol.43 No.5

Used nuclear fuel will likely be stored dry for extended periods of time in the USA. Until a final disposition pathway is chosen, the storage periods will almost definitely be longer than were originally intended. The ability of the important-tosafety structures, systems, and components (SSCs) to continue to meet storage and transport safety functions over extended times must be determined. It must be assured that there is no significant degradation of the fuel or dry cask storage systems. Also, it is projected that the maximum discharge burnups of the used nuclear fuel will increase. Thus, it is necessary to obtain data on high burnup fuel to demonstrate that the used nuclear fuel remains intact after extended storage. An evaluation was performed to determine the conditions that may lead to failure of dry storage SSCs. This paper documents the initial technical gap analysis performed to identify data and modeling needs to develop the desired technical bases to ensure the safety functions of dry stored fuel.

D, H. Lawrence and the Frontier of the Self

Maggie McConnell 한국로렌스학회 2005 D.H. 로렌스 연구 Vol.13 No.2

EXTENDED DRY STORAGE OF USED NUCLEAR FUEL: TECHNICAL ISSUES: A USA PERSPECTIVE

PAUL MCCONNELL,BRADY HANSON,MOO LEE,KEN SORENSON 한국원자력학회 2011 Nuclear Engineering and Technology Vol.43 No.5

Used nuclear fuel will likely be stored dry for extended periods of time in the USA. Until a final disposition pathway is chosen, the storage periods will almost definitely be longer than were originally intended. The ability of the important-tosafety structures, systems, and components (SSCs) to continue to meet storage and transport safety functions over extended times must be determined. It must be assured that there is no significant degradation of the fuel or dry cask storage systems. Also, it is projected that the maximum discharge burnups of the used nuclear fuel will increase. Thus, it is necessary to obtain data on high burnup fuel to demonstrate that the used nuclear fuel remains intact after extended storage. An evaluation was performed to determine the conditions that may lead to failure of dry storage SSCs. This paper documents the initial technical gap analysis performed to identify data and modeling needs to develop the desired technical bases to ensure the safety functions of dry stored fuel.

D. H. 로렌스와 변경으로서의 자아

Maggie McConnell 한국로렌스학회 2005 D.H. 로렌스 연구 Vol.13 No.2

미국인들이 쟁취하려고 노력하는 미국의 꿈을 대표하는 개인성에 대한 여러 논의가 있어왔다. 그러나 실제로 개인성을 어떻게 확보할 수 있는지에 대한 설득력 있는 논의는 부족했다고 볼 수 있다. 로렌스가 평생을 두고 고민한 소설이란 무엇인가라는 화두는 이런 개인성에 대한 논의의 폭을 넓혀줄 수 있다. 로렌스는 소설쓰기의 역사를 새로운 자아를 획득해 가는 과정으로 보았다. 특히 그가 미국고전문학연구에서 고찰하는 미국소설이 형성되는 과정과 미국인들의 자아가 만들어져가는 과정에 대한 날카로운 비평은 오늘날 우리에게 미국의 꿈에 대해 반성할 기회와 통찰력을 제공한다. 본 논문은 로렌스가 이 자아란 말을 어떤 맥락에서 사용하는지를 역사적으로 살펴보고 미국소설가들에 대한 그의 비평들을 자세히 분석함으로써 그가 추구한 새로운 자아가 무엇인지를 밝히고자 한다.

The Oxidation of Odorants from Wastewater Sludge Using Four Different Oxidants

Susana Arispe,YongJun Heor,Laura McConnell,Hyunook Kim 한국냄새환경학회 2007 실내환경 및 냄새 학회지 Vol.6 No.1

The odorants from wastewater sludge treated with four different chemical oxidants, i. e., potassium ferrate, sodium hypochlorite, sodium permanganate, and calcium nitrate, were analyzed. The release of odorants from the treated sludge was not completely eliminated, only retarded, possibly due to the low one time doseof oxidants. In a comparison of the concentration profiles of methyl mercaptan and dimethyl sulfide, calcium nitrate was the best of the four different oxidants at reducing their emission. For methyl mercaptan, calcium nitrate gave the best result, while for dimethyl sulfide, potassium permanganate was found to be the best oxidant. From this study, it was found that the oxidation-reduction potential (ORP) would be an easy and inexpensive parameter for the monitoring of the release of offensive odors.

Port Security Measures : Case study of the Port of Houston

Elizabeth H,McConnell,Gary Scheibe 아시아경찰학회 2007 아시아경찰학회 국제학술회의 Vol.2007 No.-

No observed effect of a student-led mock objective structured clinical examination on subsequent performance scores in medical students in Canada

Lorenzo Madrazo,Claire B. Lee,Meghan McConnell,Karima Khamisa,Debra Pugh 한국보건의료인국가시험원 2019 보건의료교육평가 Vol.16 No.-

Student-led peer-assisted mock objective structured clinical examinations (MOSCEs) have been used in various settings to help students prepare for subsequent higher-stakes, faculty-run OSCEs. MOSCE participants generally valued feedback from peers and reported benefits to learning. Our study investigated whether participation in a peer-assisted MOSCE affected subsequent OSCE performance. To determine whether mean OSCE scores differed depending on whether medical students participated in the MOSCE, we conducted a between-subjects analysis of variance, with cohort (2016 vs. 2017) and MOSCE participation (MOSCE vs. no MOSCE) as independent variables and the mean OSCE score as the dependent variable. Participation in the MOSCE had no influence on mean OSCE scores (P=0.19). There was a significant correlation between mean MOSCE scores and mean OSCE scores (Pearson r=0.52, P<0.001). Although previous studies described self-reported benefits from participation in student-led MOSCEs, it was not associated with objective benefits in this study.

Lymphoid tissue inducer cells: architects of CD4 immune responses in mice and men

Kim, M.-Y.,Kim, K.-S.,McConnell, F.,Lane, P. Blackwell Publishing Ltd 2009 Clinical and experimental immunology Vol.157 No.1

<P>Summary</P><P>In this review, we summarize the current understanding of the multiple functions of the mouse lymphoid tissue inducer (LTi) cells in: (i) the development of organized lymphoid tissue, (ii) the generation and maintenance of CD4-dependent immunity in adult lymphoid tissues; and (iii) the regulation of central tolerance in thymus. By contrast with mouse LTi cells, which have been well described, the human equivalent is only just beginning to be characterized. Human LTi-like cells expressing interleukin (IL)-22 have been identified recently and found to differentiate into natural killer (NK) cells. The relationship of LTi cells to NK cells is discussed in the light of several studies reporting a close relationship in the mouse between LTi cells and transcription factor retinoid-related orphan receptor &ggr;t-dependent IL-22 producing NK cells in the gut. We also outline our data suggesting that these cells are present in adult human lymphoid tissues.</P>

자기공명혈관조영술을 이용한 관상동맥 크기 nitinol 스텐트의 평가

현민수,Masahiro Terashima,Michael V. McConnell 순천향의학연구소 2006 Journal of Soonchunhyang Medical Science Vol.12 No.2

Background. Artifacts from stainless steel stents prohibit the assessment of stent patency with magnetic resonance angiography (MRA). Nitinol stents have less artifacts. The use of high radiofrequency flip angle (FA) sequence may improve the signal within the stents. We evaluated coronary-size nitinol stent patency with high FA MRA in the rabbit aortic model. Methods. Coronary-size nitinol stents (3.0-4.0 mm x 14-30 mm, Radius™, Boston Scientific, Natick, MA) were deployed in the aorta of six New Zealand White rabbits and imaged with MRA at day 2. A 1.5 Tesla GE MRI system (Signa, GE Medical Systems, Milwaukee, WI) with a standard extremity coil and high-performance gradients (40 mT/m, 150 T/m/s) was used. A multi-slice interleaved spiral coronary MRA sequence was used with a specially designed RF pulse to allow FA up to 140˚. Parameters were typical for patient coronary MRA studies (20 cm FOV, 0.6 x 0.6 x 3 mm, 20 interleaves, TR = 1000 ms, TE=7ms, = 60˚ , 90˚ , 120˚ , and 140˚). In-stent lumen signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) compared to adjacent muscle were analyzed. Results. The spiral coronary MRA sequence clearly imaged within the nitinol stents in all cases. Both SNR and CNR of the lumen signal significantly improved with increasing FA. SNR increased significantly from 60˚ to 140˚ (23.1+6.1 to 41.6+9.0, p < 0.01). And CNR also increased significantly(1.9±3.3 to 25.2±9.4, p = 0.01). Condusion. We could image and evaluate the coronary-size nitinol stent patency with high FA MRA in the rabbit aortic model.

Interbody Fusion in Low Grade Lumbar Spondylolsithesis: Clinical Outcome Does Not Correalte with Slip Reduction and Neural Foraminal Dimension

Ujjwal K. Debnath,Atanu Chatterjee,Jeffrey R. McConnell,Deepak K. Jha,Tapas Chakraburtty 대한척추외과학회 2016 Asian Spine Journal Vol.10 No.2

Study Design: Prospective nonrandomized study. Purpose: To find a possible correlation between clinical outcome and extent of lumbar spondylolisthesis reduction. Overview of Literature: There is no consensus in the literature concerning whether a beneficial effect of reduction on outcome can be expected following reduction and surgical fusion for low grade lumbar spondylolisthesis. Methods: Forty six patients with a mean age of 37.5 years (age, 17–48 years) with isthmic spondylolisthesis underwent interbody fusion with cages with posterior instrumentation (TLIF). Clinical outcome was measured using visual analogue score (VAS) and Oswestry disability index (ODI). Foraminal dimensions and disc heights were measured in standard digital radiographs. These were analyzed at baseline and 1 year after surgery and changes were compared. Radiographic fusion was judged with computed tomography scans at 1 year. Results: Ninety percent of the patients had good or very good clinical results with fusion and instrumentation. Baseline and one-year postoperative mean VAS score was 6.33 (range, 5–8) and 0.76 (range, 0–3), respectively (p =0.004). Baseline and one-year postoperative, mean ODI score was 48 (range, 32–62) and 10 (range, 6–16), respectively (p <0.001). A mean spondylolisthesis slip of 32.1% was reduced to 6.7% at 1 year. Average anterior disc height, posterior disc height, vertical foraminal dimension), and foraminal) diameter improved from 9.8 to 11.7 mm (p =0.005), 4.5 to 5.8 mm (p =0.004), 11.3 to 12.6 mm (p =0.002), and 18.6 to 20.0 mm (p <0.001), respectively. The fusion rate was 75% with TLIF. There is no significant correlation between the improvements of ODI scores and the extent of slip reduction. Conclusions: Neural decompression and interbody fusion can significantly improve pain and disability but the clinical outcome does not correlate with radiological improvement in the neural foraminal dimension.