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Volume 12 (1977)
- Issue 4 Pages 229-
- Issue 3 Pages 153-
- Issue 2 Pages 85-
- Issue 1 Pages 1-
Volume 12, Issue 2
Displaying 1-6 of 6 articles from this issue
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Hiroshi KAMINAGA, Toshishiro FURUTA, Shigeru KUMAZAWA, Hatsumi TATSUTA1977 Volume 12 Issue 2 Pages 85-93
Published: 1977
Released on J-STAGE: February 25, 2010
JOURNAL FREE ACCESSIn order to study a discrepancy in external dose measured by various types of personnel dosimeters, especially between a film badge and other dosimeters, the energy and directional dependence of 6 kinds of dosimeters was examined both in free air and on the phantom. On the basis of the experimental results, it was found that the backscattered radiation from the body has stronger influences on the dose by a film badge than that by other types of dosimeters and that the discrepancy is mainly caused by the scattered radiation. Therefore, it is suggested that a film badge should be calibrated on the phantom for diminishing the discrepancy.View full abstractDownload PDF (1135K) -
Junichiro FURUTA, Eiichi HIRAOKA, Masatoshi FUJISHIRO, Shinichi OKAMOT ...1977 Volume 12 Issue 2 Pages 95-103
Published: 1977
Released on J-STAGE: February 25, 2010
JOURNAL FREE ACCESSLow voltage accelerators with tritium target are widely used for obtaining versatile intensitive neutron sources in the both fields of industrial and scientific researches. However, recent reports on the contamination due to the tritium target have called an attention to careful handling of the target. In our experiences, a number of corroded spots was observed on the deposited tritium layer of the target after a few months. When it was bombarded with deutron beam, many fine cracks appeared on the target. Then the titanium layer was peeled off, which scattered active titanium fragments. Thus, our generator and its surroundings were contaminated. On this paper, microphotographic and autoradiographic observations of the tritium targets and the peeled off fragments were carried out.
Use of paper towel seemed most effective for the decontamination. It is not recommended to wash with water or soapless-soap.
The tritium target should be handled carefully as an unsealed radioisotope.View full abstractDownload PDF (6407K) -
Syozo HONGO1977 Volume 12 Issue 2 Pages 105-108
Published: 1977
Released on J-STAGE: February 25, 2010
JOURNAL FREE ACCESSDownload PDF (449K) -
Jiro INABA1977 Volume 12 Issue 2 Pages 109-116
Published: 1977
Released on J-STAGE: February 25, 2010
JOURNAL FREE ACCESSAs any radiation exposure may involve some degree of risk the International Commission of Radiation Protection recommends that any unnecessary exposure be avoided, and that all doses be kept ALARA, i. e., as low as is readily achievable, economic and social considerations being taken into account. To define the level at which it can be said that a dose is ALARA the use of cost- (or risk-) benefit analysis is required. In making a cost-benefit calculation the most difficult step is the conversion of positive and negative effect into a consistent set of units, i. e., conversion of man-rem into dollars. This paper presents the monetary value of population dose which appeared in the past reports (six papers reffered by ICRP Publication 22, BEIR Report and NRC-10CFR50, App. I).
We must be very careful in the application of cost-benefit analysis to decision making of individual cases, but the estimated risk in monetary term may help us at least to check whether we act in a consistent way.View full abstractDownload PDF (1266K) -
Yoshikazu YOSHIDA, Toshinori IIJIMA1977 Volume 12 Issue 2 Pages 117-126
Published: 1977
Released on J-STAGE: February 25, 2010
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Yukio EBINUMA1977 Volume 12 Issue 2 Pages 127-134
Published: 1977
Released on J-STAGE: February 25, 2010
JOURNAL FREE ACCESS
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