Abstract
Effects caused by the Nuclear Power Plan Atucha I on the fish larvae of the Paraná de las Palmas River (Argentina), Certain effects caused by the Nuclear Power Plant AtuchaI (33°58' S-59° 12' W) on the fish larvae of the Paraná de las Palmas River (lower Paraná) were identified. Surveys were carried out every 45 days from March 1995 to August 1996. Larvae were sampled in five stations: upstream and downstream the plant, at the entrance and exit of the refrigerating circuit and at the exit of the central derivation channel. Physical and chemical variables were measured except for the last station. Larvae oft he families Curimatidae, Characidae, Sciaenidae and Pimelodidae were identified. Total larval average length was measured, as well as the average length for each particular taxon. Percentage of larvae impacted by thermal and mechanical effects was calculated through subsampling. Simulation bioessays were performed in order to assess the thermal impact caused by the nuclear plant. It was observed that the main factor which accounts for the larval mortality would not be the thermal impact but the mechanical impact produced upon larvae when passing through the plant refrigerating circuit. This impact consisted in rapid pressure changes, retention by the metal strainers which are used to filter water before entering the circuit, and the intense turbulence produced in it
Highlights
&stria& EEectscausedby the Nuclear Power Plant Atucha I onthe fishlarvae ofthe Parana delasPalmas Eiver (Argentina).Certain effectscaused by the Nuclear Power Plant Atucha I (3P58's -59" 12'W) on the Ash larvae of the Parand de las Palmas River were identified
Larvae were sampled in five stations: upstream and downstream the plant, at the entrance and exit of the refrigerating circuit and at the exit of the central derivation channel
Simulation bioessays were performed in order to assess the thennal impact caused hy the nuclear plant
Summary
La Argentina pricticamente no existen antece- peces Las larvas fueron trasiadadas abruptamente desde 20% a 3P6, que corresponden a Ias temperaturas medidas aguas arriba y a l a salida de la central en el momento del muestreo, sin pasar por temperaturas intermedias I,as larvas se mantuvieron a 31°C durante 10 minutos, que corresponde aproximadamente a1 tiempo de pasaje do 10s individuos por 10s circuitos refrigerantes de la central y s u posterior transito a travhs de la pluma tkrmica producida aguas abajo de la confluencia del canal de salida con el rio. La temperatura del agua en el Rio Parana de las Palmas y on el canal de captacidn del circuito de refrigeraci6n (El, EII, EIV) varid entre 14 (invierno)y 28°C (verano),mientras que a la salida do circuit0 de enfriamionto (EIII) se registr un rango de variacidn comprendido entre 22 y 38 "C (Tabla I). Parametros fisicos y quimicos medidos en aguas superficiales del Rio Parana de las Palmas en las estaciones I a IV, densidad de larvas de peces cada 100 m3, porcentaje de larvas impactadas (% imp.), longitud total promedio
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
