Dosimetry of noble gas fission products /
| Main Author: | |
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| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1989.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Abstract: | In the first minutes and hours following a reactor accident, personnel at the reactor facility, and possibly members of the public at off-site locations may be subjected to significant radiation dose from exposure to the entire spectrum of noble gas fission products and their daughter radionuclides. In order to measure the immersion dose of noble gas fission products following the reactor accident, an atmosphere of the entire spectrum of noble gas fission products was created in the laboratory environment. Beta particle and gamma-ray immersion doses w ere measured using a plastic scintillation detector, thermoluminescence detectors, an extrapolation chamber, and an ionization chamber. The experimental results agree quite well with theoretical calculations. Because of that, theoretical calculations can be employed to reliably predict the actual dose in such a radiation environment. In the semi-infinite immersion geometry, the beta: gamma dose ratios for short-lived noble gas fission products at 0, 300, 1000 mg/cm² depth are 0.82, 0.28, and 0.04 respectively. In a finite volume (1000 m³) of immersion, the beta: gamma dose ratios for short-lived noble gas fission products at 0, 300, 1000 m g/cm² depth are 32, 10, and 1.4 respectively. Normally the immersion cloud is not semi-infinite. The finite size of immersion will be more realistic. Therefore, during the brief period following a reactor accident, the immersion dose from short-lived species, whose decay produces high-energy beta particles (up to 5 M eV), is the most important factor |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Nuclear Engineering." |
| Physical Description: | x, 76 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |