Andrew Nato

Alejandro Q. Nato, Jr., Ph.D.

Assistant Professor
Department of Biomedical Sciences
Joan C. Edwards School of Medicine
Marshall University

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Title: Environmental radioactivity measurements in the Philippines
Authors: Emerenciana B. Duran, Cecilia M. de Vera, Teofilo Y. Garcia, Fe M. dela Cruz, Alejandro Q. Nato, Jr., Dante E. Margate, and Antonio A. Asada, Jr.
Technical Report Institution: Philippine Nuclear Research Institute
Catalogued by: International Nuclear Information System
Publication Date: 1997
Volume: 29
Issue: 27
Technical Report Source: PNRI-F(PR)--98001
Technical Report Reference Number: 29036447
Abstract: Monitoring of terrestrial and marine environment for radioactivity arising from natural and artificial sources were conducted regularly as part of the environmental radiation surveillance program of the Institute. External gamma radiation in ambient air was measured in established monitoring stations surrounding PRR-1 facility using a High Pressure Ion Chamber. Samples offish and seawater were collected from the coasts of Surigao City, Surigao, Borongan, Eastern Samar and Basco, Batanes and were analyzed for 137Cs. The average ambient gamma dose rate observed around PRR-1 facility was 49 nGy/h which falls closely with the average ambient gamma dose rate of 45 nGy/h observed over the entire Philippines (Duran et al., 1996). The average 137Cs activity concentration of 4 Bq/m3 measured in seawater falls within the range of values (2 to 13 Bq/m3) reported for seawater collected from the Pacific Ocean (Duran et al., 1996) and those reported in FAO Area 61 (Aarkrog et al., 1996). The average 137Cs activity concentration of 4 Bq/kg dry (3 Bq/kg wet) observed in fish samples falls within the reported range of values (0.1 to 3 Bq/kg wet) for fish (Duran et al., 1996, Aarkrog et al., 1996).
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