Development and Verification of Ph Calculation Model of in-Containment Refueling Water Storage Tank under Severe Accidents

Dai Wei; Jiang Pingting; Chen Peng; He Dongyu

doi:10.13832/j.jnpe.2023.04.0259

Volume 44 Issue 4

Aug. 2023

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Dai Wei, Jiang Pingting, Chen Peng, He Dongyu. Development and Verification of Ph Calculation Model of in-Containment Refueling Water Storage Tank under Severe Accidents[J]. Nuclear Power Engineering, 2023, 44(4): 259-266. doi: 10.13832/j.jnpe.2023.04.0259

Citation:

Dai Wei, Jiang Pingting, Chen Peng, He Dongyu. Development and Verification of Ph Calculation Model of in-Containment Refueling Water Storage Tank under Severe Accidents[J]. Nuclear Power Engineering, 2023, 44(4): 259-266. doi: 10.13832/j.jnpe.2023.04.0259

Citation:

Dai Wei, Jiang Pingting, Chen Peng, He Dongyu. Development and Verification of Ph Calculation Model of in-Containment Refueling Water Storage Tank under Severe Accidents[J]. Nuclear Power Engineering, 2023, 44(4): 259-266. doi: 10.13832/j.jnpe.2023.04.0259

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Development and Verification of Ph Calculation Model of in-Containment Refueling Water Storage Tank under Severe Accidents

doi: 10.13832/j.jnpe.2023.04.0259

China Nuclear Power Technology Research Institute, Shenzhen, Guangdong, 518000, China

Received Date: 2022-09-21
Rev Recd Date: 2022-11-20
Publish Date: 2023-08-15

Abstract

Abstract

In order to solve the problem of lacking tools for calculating the pH value of in-containment refueling water storage tank in nuclear power plants after the accident, this paper develops a direct modeling and in-time analysis model for pH value calculation. Based on Newton-Raphson method, by establishing the database of physical properties of key items and reactions, and by building a gas-liquid two-phase chemical equilibrium model, a pH value calculation software CalcpH with a complete database, the capability of high radiation calculation and the capability of coupling calculation with accident evolution is developed. The results of CalcpH are compared with the results calculated by ASTEC (a commonly used severe accident analysis software) and PHREEQC (a commonly used chemical equilibrium analysis software). For non-irradiation reactions, the difference between the calculation results of CalcpH and the results of PHREEQC is within 1.3%. For irradiation reactions, the difference between the results of CalcpH and the results of ASTEC is within 2.7%. While comparing the calculation results of CalcpH with experimental results, the difference is within 1%. The reliability of the calculation results is fully proved by software comparison and experimental comparison. Therefore, the numerical calculation model established by CalcpH can be used to predict the pH value of in-containment refueling water storage tank after the accident..
- Severe accident,
- Source term,
- pH value

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References(14)

References

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