ASSESSMENT OF HUMAN ERROR IMPORTANCE IN PWR PSA

作者：Karimi Kaveh^*; Yousefpour Faramarz; Tehranifard Ali Abbaspour; Pourgol Mohammad Mohammad

来源：Romanian Journal of Physics, 2014, 59(7-8): 873-883.

• Human Reliability Analysis (HRA)
• Probabilistic Safety Assessment (PSA)
• Nuclear Power Plant Risk

Pilot errors have undeniable role in the total risk of engineering systems including Nuclear Power Plants (NPPs). Analysis of this role is the subject of this paper.
Human actions affecting the risk of a typical pressurized water reactor are identified using Probabilistic Safety Assessment (PSA) model. And Human Error Probabilities (HEPs) for each action is estimated by using Human Reliability Analysis (HRA) techniques. Thereafter, human actions are incorporated in the PSA model. Finally the total risk of NPP is calculated which becomes 1.99 E-05 per reactor critical year in terms of Core Damage Frequency (CDF).
Sensitivity analyses showed that highly reliable operator actions, defined to be actions with HEP of one order of magnitude lesser than normal value, would decrease the CDF up to 12.76% while, perfect human actions, defined as those actions with zero HEP, show a 14.29% decrease in the CDF.
The interesting point found in the sensitivity analyses is that less reliable actions would increase the CDF up to 563%. Just similar to highly reliable actions, less reliable actions are those actions with HEP of one order of magnitude higher than the normal value.
With no credit to all operator actions, i.e. setting all HEP=1, CDF would rise up to 3.65E-2 per reactor critical year.

• 出版日期2014