Thread Content
The accuracy of SIL software in performing calculations is on par with that of E*da exSILentia – RiskCloud, the risk management solution from WuYou. Regarding RiskCloud (risk5u.com), it is a risk analysis software independently developed by Shanghai Gelue Software Technology Co., Ltd. (hereinafter referred to as “Gelue”); it features a proprietary risk analysis method (**Patent: CN201710121334). RiskCloud is by far the only risk analysis software in the world that integrates web-based HDM custom analysis methods, intelligent HAZOP analysis and LOPA rating, as well as SIL assessment based on the Markov algorithm (SIL verification and SIL calculation). Gelue RiskCloud is also the only domestic software to be represented by a renowned company in the field of operational risk management in North America as a risk analysis tool. 1. Introduction As is well known, Shanghai Guelue’s RiskCloud is a highly renowned software in China for HAZOP analysis, LOPA classification, and SIL assessment, and it has received positive reviews from many users. This paper calculates the PFDAvg value using RiskCloud and E*da exSILentia respectively and compares the results. Both software tools employ the Markov model algorithm; with the rapid updates to RiskCloud, the parameters taken into consideration by RiskCloud have become similar to those of exSILentia. The calculation results are also extremely close to exSILentia. RiskCloud’s voting methods support not only modes such as 1oo1, 1oo1D, 1oo2, 1oo2D, 1oo3, 1oo4, 2oo3, 2oo4, 4oo4, 5oo5, 6oo6, 7oo7, and 8oo8, but also take a very comprehensive range of parameters into account, making it the best in China. It furthermore supports the PVST function for valves, as well as modes such as Diverse and MooN. The specific types of comparison are shown in the figure below. The parameters such as Mission Time, Startup Time, MTTR, PTI, and PTC are as shown in the RiskCloud diagram. 2 1oo1 Sensor failure data: λSD=0, λSU=99FIT, λDD=377FIT, λDU=45FIT. For 1oo1, the calculation results are as follows: the PFD calculated in RiskCloud is 4.81E-4, while the PFD calculated in exSILentia is 4.82E-4; the difference between the two is only 0.21%. RiskCloud calculation results -->