中广核自主污垢行为分析软件CAMPSIS1.0研发与验证

Development and Verification of CAMPSIS 1.0-A Crud Behavior Analysis Code

压水堆污垢行为涉及材料、化学、热工、中子学等多个学科,包含了较为复杂的物理过程,可能引发污垢导致功率偏移(CIPS)、污垢导致局部腐蚀(CILC)等潜在运行风险,也会影响一回路冷却剂及金属表面的放射性剂量。自2018年开始,历时3年中广核开发了自主污垢行为分析软件CAMPSIS1.0,它包含腐蚀释放、水化学、核素活化、污垢沉积等污垢行为模拟所需的核心模型,同时具备了CIPS、CILC风险分析和一回路腐蚀产物活化源项分析的能力。通过实验数据、电厂正常运行和停堆期间的测量数据对软件进行了系统验证。结果表明,CAMPSIS1.0初步具备了在工程上进行污垢行为分析的能力。

The crud behavior in PWRs involves complex physical processes that consist of several subjects including material science, chemistry, thermal hydraulics, neutronics, etc. It could induce CIPS(CRUD induced power shift) and CILC(CRUD induced localized corrosion)phenomena which will not only lead potential risks to plant operation, but also influence the radioactive dose of the moderator and metal surface. Internationally, the US developed code BOA is widely adopted to perform risk analysis of CIPS and CILC, and the PACTOLE or OSCAR code developed in FRANCE is utilized to perform source term analysis of the corrosion products. Since 2018, CGN took three years to develop its own crud behavior code CAMPSIS 1.0. The code contains the core models of corrosion release, water chemistry, nuclide activation and crud deposition which makes CAMPSIS capable to perform risk analysis of CIPS and CILC and source term analysis at the same time. CAMPSIS has been verified against experiment data, measurements in normal operational conditions and shutdown periods. Results showed that CAMPSIS 1.0 is capable to perform crud behavior analysis in engineering-level.