Development of an optimal mitigation strategy by estimating the conditional core damage probability with time-dependent recovery actions

2020 ◽  
Vol 142 ◽  
pp. 107381
Author(s):  
In Seop Jeon ◽  
Hyun Gook Kang
Keyword(s):  
Mitigation Strategy ◽  
Time Dependent ◽  
Damage Probability ◽  
Core Damage

Analysis of Operator Responses to Mitigate Temperature Rise in Electrical Auxiliary Building

2010 ◽  
Author(s):  
M. James Hardy ◽  
Matthew F. King ◽  
Ryan Bigelow
Keyword(s):  
Air Temperature ◽  
Temperature Rise ◽  
Air Conditioning ◽  
South Texas ◽  
Balance Equations ◽  
Damage Probability ◽  
Core Damage ◽  
Computational Fluid Dynamics Cfd ◽  
Building Heat ◽  
Simulation And Validation

The loss of air conditioning in the electrical auxiliary building at South Texas Project (STP) has been shown in previous work to result in relatively rapid air temperature rise. The heat up is a concern in the Probabilistic Risk Assessment (PRA) because it may be associated with high conditional core damage probability. As a consequence, operator responses to mitigate the building heat up have been developed and proceduralized at STP. The plant’s current loss of electrical auxiliary building HVAC operator procedure was analyzed and improvements have been recommended. This was done using a commercial computational fluid dynamics (CFD) package that modeled the transient air temperature rise of the building and qualitatively assessed the effectiveness of operator actions. A possible methodology for validating the CFD results was developed using coupled energy balance equations for individual rooms. The methodology is a conservative approach to compare the effectiveness operator actions and provide steps for future higher fidelity simulation and validation. While the specific approach is applicable to STP, the overall methods and approaches described should be applicable to other sites that may be subject to excessive room heat up due to loss of air conditioning in critical rooms.

Effect of the Surveillance Test Frequency of SDS1 on the Core Damage Probability

2008 ◽  
Vol 161 (2) ◽  
pp. 98-107 ◽  
Author(s):  
Sungwhan Cho ◽  
Jin Jiang
Keyword(s):  
Test Frequency ◽  
The Core ◽  
Damage Probability ◽  
Core Damage

Transformation of classical PSA and DSA into the form of conditional event tree: An approach of human action in time dependent core damage risk

2022 ◽  
Vol 165 ◽  
pp. 108662
Author(s):  
Alireza Najafi ◽  
Athena Shahsavand ◽  
Seyed Ali Hosseini ◽  
Amir Saeed Shirani ◽  
Faramarz Yousefpour ◽  
...  
Keyword(s):  
Human Action ◽  
Time Dependent ◽  
Event Tree ◽  
Conditional Event ◽  
Core Damage ◽  
Damage Risk

ON THE TIME-DEPENDENT SPECIFIC HEAT OF GLASSES AT LOW TEMPERATURES

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-970-C6-972 ◽  
Author(s):  
R. Rammal ◽  
R. Maynard
Keyword(s):  
Specific Heat ◽  
Low Temperatures ◽  
Time Dependent
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