| Abstract: | To examine the performance of the high efficiency particulate air (HEPA) filter, demonstration tests were done in various conditions, such as; normal condition, high temperature and earthquake condition, using conventional deep-pleat filters, 610- × 610- × 292-mm in size. The authors found that the HEPA filter acted efficiently enough in various conditions supposed in the air purification system of a nuclear plant. Some empirical formulae were proposed to express the performance of the filter. The test results were summarized from these three points: (1) decontamination factor (DF) of intact filters, (2) mechanical strength and (3) pinholes, because these three points are important criteria in evaluating the performance of HEPA filter systems. |
