Abstract
The process of a power reactor spent fuel reprocessing pilot plant (hereinafter referred to as the “pilot plant”) had been completed through active commissioning. Operational and technological parameters, such as shearing, dissolution, feed clarification, co-decontamination cycle, uranium and plutonium purification cycle, and the uranium and plutonium finishing facility, were identified. In addition, technical devices including extraction and mechanical equipment, electrical installation as well as instrumentation, and auxiliary systems for safety and adaptability were also verified. The commissioning results indicated that the recovery rate and decontamination coefficients of each system satisfied the designed index requirements and the qualified productions, i.e. uranium trioxide and plutonium dioxide, were produced. Monitored values at various monitoring points in the radiological protection system were within the control range and the discharge of waste water and waste gas complied with the relevant standards. This shows that independent and innovative technology for power reactor spent fuel reprocessing had been developed by our country.
Highlights
Active commissioning1.1 Tasks for active commissioning (i) To verify the operational performance of the system and obtain operational parameters for radioactive feed by shearing and dissolution of spent fuel elements, settling centrifuge and feed preparation;
The process of a power reactor spent fuel reprocessing pilot plant had been completed through active commissioning
After nearly seven years of constant effort and through water commissioning, acid commissioning, cold uranium commissioning, followed by 5%, 50% and 100% active commissioning in succession, the active commissioning of a Chinese pilot plant for spent fuel reprocessing was successfully completed on December 21, 2010, using independent and innovative technology
Summary
1.1 Tasks for active commissioning (i) To verify the operational performance of the system and obtain operational parameters for radioactive feed by shearing and dissolution of spent fuel elements, settling centrifuge and feed preparation;. (ii) To acquire the operational parameters during the active commissioning stage; and to verify whether or not the operational performance of extraction equipment in the chemical separation section and the recovery rate, decontamination coefficient and uranium and plutonium separation coefficients in each system could satisfy the designed index;. (iii) To verify and choose the operational conditions and safe performance index of the medium-level liquid waste evaporator in the active commissioning stage;. (iv) To ensure that the key equipment in the uranium finishing facility, i.e. uranium concentration evaporator, electrolyzer and fluidized bed, could operate stably to meet the technological requirements;. (viii) To check the adaptability of equipment and facilities, such as mechanical equipment and electrical installation as well as instrumentation, etc., during the active commissioning
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