• Nuclear Engineering and Technology
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• v.50 no.2
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• pp.297-305
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• 2018

Fuel assembly (FA) bow in pressurized water reactor (PWR) cores is considered to be a complex process with a large number of influencing mechanisms and several unknowns. Uncertainty and sensitivity analyses are a common way to assess the predictability of such complex phenomena. To perform such analyses, a structural model of a row of 15 FAs in the reactor core is implemented with the finite-element code ANSYS Mechanical APDL. The distribution of lateral hydraulic forces within the core row is estimated based on a two-dimensional Computational Fluid Dynamics model with porous media, assuming symmetric or asymmetric core inlet and outlet flow profiles. The influence of the creep rate on the bow amplitude is tested based on different creep models for guide tubes and fuel rods. Different FA initial states are considered: fresh FAs or FAs with higher burnup, which may be initially straight or exhibit an initial bow from previous cycles. The simulation results over one reactor cycle demonstrate that changes in the creep rate and the hydraulic conditions may have a considerable impact on the bow amplitudes and the bow patterns. A good knowledge of the specific creep behavior and the hydraulic conditions is therefore crucial for making reliable predictions.

• Korean Journal of Social Welfare
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• v.40
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• pp.38-67
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• 2000

The study aims to understand the traditional context of the social policies in Germany by reviewing the course of transition of the traditional, ancient and/or medieval social policies or ideas of social policy in the country as a typical example of such transitions, which started being passed over to the modern civic society at the end of the medieval age, that is, during the 15th and 16th centuries. One of the reasons why the domestic interest in the German social policy is higher than the actual research achievements and frequently discussed seems explainable because a social security or welfare policy through a social insurance was initiated in Germany for the first time over the world in the 19th century. Notwithstanding, however, that all of us know that such a policy was not made in a day, cases are sometimes visible where focuses are easily drawn only to the periodic and economical phenomena in the 19th century and the strategic option of Preussen. Moreover, no literature which integrates thoroughly or publicly the social policies in Germany has been introduced at home, and some research books or study papers, if any, are inclined to concentrate merely on the social policies after the 19th century. Indeed, there are views, not rare, that a social policy of a national dimension was initiated along with the establishment of capitalism or an industrial society. According to such views, an industrial society or capitalism was begun to shape in the 19th century, and it is accordingly so national to lay our focuses on the social policies after the century. But from the fact that a national social policy existed much farther before the capitalism was established, it can be inferred that such policies were inevitable in all societies where a social issue existed. In the case of our country which experienced a more serious separation from the tradition than other countries by her rapid industrialization and Westernization, it is true that some traditional traces remain still regardless of their actual realization.

• The Korean Journal of Archival Studies
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• no.17
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• pp.85-114
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• 2008

One of the features of record management during the Gabo Reform is that the documents office controled producing and distribution of records. The records completed the operations were sent the record office and classified and arranged. previous researches understood this record management system during Gabo Reform were introduced from Japan. This article clarifies that new record management system settled through Meiji Restoration were introduced from German(Prussian) registry system at the time. However, German registry system managed current records and this system was based on modern record management system which open the records to the public with archives. Japan accepted only registry system, current record management system of German, and didn't established archives at Meiji regime. It is same with Joseon Dynasty during the Gabo Reform regime. Therefore, the record related regulation at the Gabo Reform regime could not be judged to be a modern system. The regulations on records at Gabo Reform regime had no terms about people's right or open the records to the public which decides modern record regulations. The meaning of record system during Gabo Reform regime is that the value of records and name of organizations coincides with record life cycle. The documents office managed current records and record office classified and filed closed records. Concept of "current record=document=documents office, non-current record=record= record office" didn't succeed to today. The term 'record' is used as current record or non-current record without difference.