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Jane Teas,Lewis E. Braverman,Mindy S. Kurzer,Sam Pino,Thomas G. Hurley,James R. Hebert 한국식품영양과학회 2007 Journal of medicinal food Vol.10 No.1
Seaweeds and soy are two commonly eaten foods in Asia. Both have been reported to affect thyroid function,seaweed because of its iodine content and soy because of its goitrogenic effect. Twenty-five healthy postmenopausal women(mean age 58 years) completed a double-blinded randomized crossover study. Ten capsules (5 g/day) of placebo or seaweed(Alaria esculenta), providing 475 .g of iodine/day, were consumed daily for 7 weeks. A powdered soy protein isolate (So-lae Co., St. Louis, MO), providing 2 mg of isoflavones/kg of body weight, was given daily during the last week of each treat-ment arm. On average, this provided 141.3 mg of isoflavones/day and 67.5 g of protein/day. Blood samples and 48-hour urinesamples were collected before and after each intervention period, and urinary I/C (.g of iodine/g of creatinine) and serumthyroxine, free thyroxine index, total triiodothyronine, and thyroid stimulating hormone (TSH) were measured. Seaweed in-gestion increased I/C concentrations (P. .0001) and serum TSH (P. .0001) (1.69. 0.22 vs. 2.19. 0.22 .U/mL, mean.SE). Soy supplementation did not affect thyroid end points. Seven weeks of 5 g/day seaweed supplementation was associatedwith a small but statistically significant increase in TSH. Soy protein isolate supplementation was not associated with changesin serum thyroid hormone concentrations.
IDENTIFICATION AND ASSESSMENT OF AGING-RELATED DEGRADATION OCCURRENCES IN NUCLEAR POWER PLANTS
최인길,준영선,김민규,JINSUO NIE,JOSEPH I. BRAVERMAN,CHARLES H. HOFMAYER 한국원자력학회 2012 Nuclear Engineering and Technology Vol.44 No.3
Aging-related degradation of nuclear power plant components is an important aspect to consider in securing the long term safety of the plant, especially the seismic safety, since the degradation of the components affects not only their seismic capacity but their response. This can cause a change in the seismic margin of a component and the overall seismic safety of a system. To better understand the status and characteristics of degradation of components in Nuclear Power Plants (NPPs), the degradation occurrences of components in the U.S. NPPs were identified by reviewing recent publicly available information sources and the characteristics of these occurrences were evaluated and compared to observations from the past. Ten categories of components that are of high risk significance in Korean NPPs were identified, comprising anchorage, concrete, containment,exchanger, filter, piping systems, reactor pressure vessels, structural steel, tanks, and vessels. Software tools were developed to expedite the review process. Results from this review effort were compared to previous data in the literature to characterize the overall degradation trends.
IDENTIFICATION AND ASSESSMENT OF AGING-RELATED DEGRADATION OCCURRENCES IN NUCLEAR POWER PLANTS
Choi, In-Kil,Choun, Young-Sun,Kim, Min-Kyu,Nie, Jinsuo,Braverman, Joseph I.,Hofmayer, Charles H. Korean Nuclear Society 2012 Nuclear Engineering and Technology Vol.44 No.3
Aging-related degradation of nuclear power plant components is an important aspect to consider in securing the long term safety of the plant, especially the seismic safety, since the degradation of the components affects not only their seismic capacity but their response. This can cause a change in the seismic margin of a component and the overall seismic safety of a system. To better understand the status and characteristics of degradation of components in Nuclear Power Plants (NPPs), the degradation occurrences of components in the U.S. NPPs were identified by reviewing recent publicly available information sources and the characteristics of these occurrences were evaluated and compared to observations from the past. Ten categories of components that are of high risk significance in Korean NPPs were identified, comprising anchorage, concrete, containment, exchanger, filter, piping systems, reactor pressure vessels, structural steel, tanks, and vessels. Software tools were developed to expedite the review process. Results from this review effort were compared to previous data in the literature to characterize the overall degradation trends.