Analysis of the thermal-hydraulic behavior of the EU-DEMO WCLL breeding blanket cooling systems during a loss of flow accident

被引：9

作者：

Ciurluini, Cristiano ^{[1
]}

Giannetti, Fabio ^{[1
]}

Martelli, Emanuela ^{[2
]}

Del Nevo, Alessandro ^{[3
]}

Barucca, Luciana ^{[4
]}

Caruso, Gianfranco ^{[1
]}

机构：

[1] Sapienza Univ Rome, DIAEE, Corso Vittorio Emanuele II 244, I-00186 Rome, Italy

[2] ENEA, Dept Fus & Nucl Safety Technol, I-00044 Rome, Italy

[3] ENEA CR Brasimone, ENEA FSN ING SIS, I-40032 Camugnano, BO, Italy

[4] Ansaldo Nucl, Corso Perrone 25, I-16100 Genoa, Italy

来源：

FUSION ENGINEERING AND DESIGN | 2021年 / 164卷

关键词：

DEMO; Primary heat transfer system; Balance of plant; RELAP5; Loss of flow accident; HEAT-TRANSFER;

D O I：

10.1016/j.fusengdes.2020.112206

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The water-cooled EU-DEMO Breeding Blanket (BB) is cooled by two independent circuits, the Breeder Zone (BZ) and the First Wall (FW) Primary Heat Transfer Systems (PHTS). The configuration under study foresees the presence of an Intermediate Heat Transfer System and an Energy Storage System to operate the turbine during both the pulse (2 h) and the dwell time (10 min) at almost constant load, despite the plasma power pulsation. Within the framework of the EUROfusion WPBOP research activity, a RELAP5/Mod3.3 model was developed to investigate the thermal-hydraulic behavior of the primary cooling systems during transient conditions belonging to the category of ?Decrease in Coolant System Flow Rate?. The nodalization includes the BB, the PHTS circuits, the BZ Once Through Steam Generators and the FW Heat EXchangers. The model was initially used to simulate the nominal conditions with the pulse and dwell phases. Then, starting from the pulse, a Loss of Flow Accident (LOFA) was selected to preliminary evaluate the PHTS behavior with the aim of the design improvement. LOFA analyses were performed considering the complete loss of both the FW and BZ PHTS main coolant pumps (MCPs). A sensitivity was carried out to assess the impact of the MCPs flywheel on the main PHTS parameters. Transient results highlighted the appropriateness of the current design with no need for further mitigation actions.

引用

页数：6

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