Rolling Test Simulation of Sea Transport of Spent Nuclear Fuel Under Normal Transport Conditions

임재훈,최우석 한국방사성폐기물학회 2023 방사성폐기물학회지 Vol.21 No.4

In this study, the impact load resulting from collision with the fuel rods of surrogate spent nuclear fuel (SNF) assemblies was measured during a rolling test based on an analysis of the data from surrogate SNF-loaded sea transportation tests. Unfortunately, during the sea transportation tests, excessive rolling motion occurred on the ship during the test, causing the assemblies to slip and collide with the canister. Hence, we designed and conducted a separate test to simulate rolling in sea transportation to determine whether such impact loads can occur under normal conditions of SNF transport, with the test conditions for the fuel assembly to slide within the basket experimentally determined. Rolling tests were conducted while varying the rolling angle and frequency to determine the angles and frequencies at which the assemblies experienced slippage. The test results show that slippage of SNF assemblies can occur at angles of approximately 14° or greater because of rolling motion, which can generate impact loads. However, this result exceeds the conditions under which a vessel can depart for coastal navigation, thus deviating from the normal conditions required for SNF transport. Consequently, it is not necessary to consider such loads when evaluating the integrity of SNFs under normal transportation conditions.

소간암의 초음파진단 : 전향적 시도

임재훈 대한영상의학회 1986 대한영상의학회지 Vol.22 No.4

Small hepatoma is defined a s hepatocellular carcinoma less than 3 cm in maximum diameter and fewer than 3 in number. To assess the ability of ultrasound to detect small hepatomas, a prospective study was done in a group of patients with HBsAg-positive chronic hepatitis and liver cirrhosis. Herein, we present 4 hypoechoic small hepatomas detected on ultrasound and emphasized the role of real-time ultrasonography as a practical test form monitoring hepatoma high-risk subjects.

논문작성법 -잡지 게재용 논문의 원고작성을 중심으로-

임재훈 대한영상의학회 1987 대한영상의학회지 Vol.23 No.2

하부간열의 해부

임재훈 대한영상의학회 1988 대한영상의학회지 Vol.24 No.1

To assess the shape and frequency of the inferior accessory hepatic fissure authors observed 14 cadaveric liver and 100 abdominal CT scans. The inferior accessory hepatic fissure was present in eight of 14 cadaveric livers and eleven of 100 abdominal CT scans. A shallow notch was present in 46 of 100 CT scans and many of these notches may represent either shallow or deep fissures. The inferior accessory hepatic fissure is not a rare anatomic variation as the fissure was encountered in more than half of the cadavers and CT scans.

효과적인 강의 슬라이드

임재훈 대한영상의학회 1986 대한영상의학회지 Vol.22 No.4

" Lawyers, with their constant opportunity for practice , show a talent for public oratory that few doctors can equal. However, the physician, despite his more modest and hesitant delivery, has one great advantage over the most experienced lawyer . He is allowed to use slides, Slides of good quality conceal defects in oratory and they make for a confident speaker and a contented audience. By contrast, smudged, complicated or illprepared slides may draw attention to minor defects in delivery and make the audience inattentive." Zollinger and Hower and Howe

위암의 개복후 절제가능성에 관한 방사선학적 고찰

임재훈 대한영상의학회 1976 대한영상의학회지 Vol.12 No.2

As yet, only effective treatment in gastric cancer is early diagnosis and early curative gastric resection. However, almost all cases of gastric cancer, when diagnosed, are advanced cancer and large proportion of them are inoperable because of distant metastasis and peritoneal dissemination. Some half of explorated gastric cancers are unresectable because of extension into adjacent organs or regional lymphnodes. Authors analysed U.G.I. series in 30 cases of unresectable gastric cancer and 30 cases of resected advanced gastric cancer, explorated at Seoul National University Hospital. Results are as follows; 1. In unresectable cases, findings of gastric fixation is observed in 77% and normal in 23%, in contrast to 13% and 87%, respectively, in resectable cases. 2. Retrogastric space is widened in 97% of unresectable gastric cancer and is normal in only 3%, in contrast to 33% and 67%, respectively, in resectable cases. 3. In unresectable cases C-loop widening is observed much mor frequently than in resectable cases. 4. In unresectable cases gastric cancer is more frequent in the body portion, and more frequently infiltrative in type and more extensive in extent in comparison with that of resectable cases. 5. It may be said conclusively, findings of gastric fixation and retrogastric mass are indicative findings of unresectability in gastric cancer.

방사선과학 분양

임재훈 大韓消化器病學會 1988 大韓消化器病學會誌 Vol.20 No.3

췌장질환에 대한 전산화단층촬영과 초음파검사의 비교

임재훈 대한영상의학회 1984 대한영상의학회지 Vol.20 No.1

A retrospective comparative analysis was made to assess the relative efficacy and advantage of computed tomography (CT) and ultrasound in the diagnosis of pancreatic lesions in patients with 33 various pancreatic diseases. All patients underwent both CT and ultrasound examinations. CT has advantages in delineation of morphologic anatomy and its extent, and in identifying abnormal gas and calcification. On the other hand, ultrasound has advantages in evaluation of cystic lesion, pancreatic duct and bile duct. Authors recommend ultrasound as a screening test in the diagnosis of uncomplicated pancreatitis, pseudo-syst and pancreatic cancer producing jaundice, but recommend CT in the diagnosis of complicate pancreatitis, chronic pancreatitis and non- jaundiced patient with suspected pancreatic cancer, Ultrasound has additional advantage in ultrasound - guided aspiration biopsy.

간흡충증의 초음파진단

임재훈 대한영상의학회 1984 대한영상의학회지 Vol.20 No.3

In order to assess the reliability of ultrasonographic critria of clonorchiasis, a prospective study was performed in 14 patients who were diagnosed as clonorchiasis by ultrasonogram only, using the criteria of peripheral duct dilatation without dilatation of extrahepatic duct. Eleven out of 14 patients were turned out to be clonorchiasis, showing 93% accuracy. Authors intend to stress these ultrasonographic signs are very well correlated with the CT and ERCP findings and are proved to be highly reliable for clonorchiasis, and thus clonorchiasis could be diagnosed by ultrasonogram only.

췌장의 낭선종과 낭선암의 초음파촬영 및 전산하단층촬영

임재훈 대한영상의학회 1983 대한영상의학회지 Vol.19 No.2

Although cystic neoplasms of the pancreas are an uncommon disease, it occurs often enough that proper surgical management depends on accurate preoperative diagnosis. It is very difficult to diagnose accurately by conventional radiological methods alone. Angiographic findings are fairly characteristic for these tumors, but they are in no way specific. The imaging characteristics of ultrasonography and computed tomography are particularly useful in the diagnosis of this particular tumors. The report presents an analysis of 2 cases of cystandenoma and 3 cnases cystandenocarcinoma examined by ultrasonography and computed tomography. Ultrasonographic findings are complex multicytic mass in the pancreas with thick irregular wall, daughter cyst, septa and solid component. These septa and solid component are highly echogenic if the tumor is mucin producing. Computed tomographic findings are large cyst possessing irregular thick wall, solid component and septa which are enhanced by contrast infusion. Punctate or curvilinear calcification is seen occasionally. Tortuous or beaded vascular collaterals are seen around the cyst. On the other hand, pseudocyst is usually a single cyst possessing thin smooth wall, and solid component or septa are unusual in pseudocyst.