Date:

2025-04-30

Title of Paper:

Effects of superimposed cyclic operation on corrosion products activity in reactor cooling system of AP-1000

Journal:

NUCLEAR ENGINEERING AND TECHNOLOGY

Summary:

摘要

It is essential to predict the radioactivity distribution around the reactor cooling system (RCS) during obligatory cyclic operation of AP-1000. A home-developed program CPA-AP1000 is upgraded to predict the response of activated corrosion products (ACPs) in the RCS. The program is written in MATLAB and it uses state of the art MCNP as a subroutine for flux calculations. A pair of cyclic power profiles were superimposed after initial full power operation. The effect of cyclic operation is noticed to be more prominent for in-core surfaces, followed by the primary coolant and out-of-core structures. The results have shown that specific activity trends of Mn-56 and Na-24 promptly follow the power variations, whereas, Fe-59, Co-58, Mo-99 and Co-60 exhibit a sluggish power-following response. The investigations pointed out that promptly power-following response of ACPs in the coolant is vital as an instant radioactivity source during leakage incidents. However, the ACPs with delayed power-following response in the out-of-core components are perceived to cause a long-term activity. The present results are found in good agreement with those for a reference PWR. The results are useful for source term monitoring and optimization of work procedures for an innovative reactor design. (C) 2019 Korean Nuclear Society, Published by Elsevier Korea LLC.

作者关键词:Corrosion products activity; CPA-AP1000; Cyclic operation; Reactor coolant system; AP-1000

KeyWords Plus:TYPICAL PWR; TRANSPORT; TRANSIENTS; TERM

通讯作者地址: Hu, HS (通讯作者)
Xi An Jiao Tong Univ, Sch Nucl Sci & Technol, Xian 710049, Shaanxi, Peoples R China.
huasi_hu@mail.xjtu.edu.cn

基金资助致谢
1、China Scholarship Council，2016GXZO22
 
2、Major Project of National Science Technology  
MTR-ZB01K01W16-004 ，Shanghai Nuclear Engineering Research & Design Institute    
Nuclear Power Institute of China    

DOI: 10.1016/j.net.2019.02.006

Article history:
Received 18 November 2018
Received in revised form
30 January 2019
Accepted 6 February 2019
Available online 6 February 2019

Co-author:

Mahmood, Fiaz ; Hu, Huasi ; Lu, Guichi；Ni, Si ; Yuan, Jiaqi

Volume:

51（4）

Page Number:

1109-1116

Translation or Not:

No

Date of Publication:

2019-07-01