The British Steam Generating Heavy Water Reactor: A reassessment with thermal hydraulic-neutronic coupling

被引:2
作者
Billiet, Simon [1 ,2 ]
Cosgrove, Paul [2 ]
Read, Nathaniel [2 ]
机构
[1] Belgian Nucl Res Ctr SCK CEN, Inst Nucl Mat Sci, Boeretang 200, B-2400 Mol, Belgium
[2] Univ Cambridge, Dept Engn, Cambridge CP2 1PZ, England
关键词
Thermal hydraulic-neutronic coupling; Pressure tube reactor; Void and power coefficient of reactivity; D 2 O moderator; Serpent; CORE;
D O I
10.1016/j.nucengdes.2022.111880
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 Steam Generating Heavy Water Reactor (SGHWR) was of significant interest in the UK in the late 1960s and early 1970s but failed to be developed into a commercial programme. This paper reassesses the reactor physics of the SGHWR with modern day modelling tools: neutronics and thermal hydraulics are coupled using Serpent and THERMO. Such a coupling is required since the boiling coolant along the SGHWR pressure tube height will have a significant influence on the neutronics of the system. Results show that the coolant void coefficient is negative at nominal conditions. This is achieved by the important contribution of the coolant towards moderation. Plutonium build-up throughout burnup also has a beneficial effect on the void coefficient. Quasi-static analyses of mass flow changes, pressure changes, and overpower events are examined. Most importantly, the power coefficient is negative. Superheated steam coolant conditions are also simulated for a SGHWR pressure tube. Although the steam temperature coefficient is slightly positive, the power coefficient is also negative.
引用
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页数:17
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