PHEBUS FPT1 Containement Chemistry: Activity and Mass of the main Elements, Dose from them to the Liquid and Gaseous Phases, Formation of Nitric Acid-Part a.2-a.3-a.4 (Concerning Dose, Nitric Acid Formation, Conclusions)

This paper reports an approximate calculation on the fission product distribution in the FPT1 containment. It is the completion of the comprehensive assessment on activity, mass and dose at present into execution at Casaccia Centre on the FPT1 experience. The part a.1 has been published on January 21, 1999. The paper is constituted by three parts: Part a.2 - It reports the results of an estimation about the dose rate to air and water from the Xe, Kr, Cs, I and Te isotopes during the experience. Data are showed as a function time from the degradation phase to 503000 seconds. The dose estimation concerns three different parts of the containment: gas phase, liquid phase,elliptical bottom. Part a.3 - It reports the amount of nitric acid produced by dose in the gas and liquid phases. Part a.4 - It introduces a brief discussion of the results obtained. A number of figures and tables present activity, amount and dose at pre-established times for each fission product.