----- MAINTENANCE ----- 
 
>> RBA (rule-based action) for error of omission (maintenance) 
Written materials: Yes 
Table 20-5 [preparation]: 
    Not relevant (written materials are licensed) 
Table 20-6 [administrative control]: 
    HEP that procedure will not be used (maintenance, item 7): 
    HEP = 3.00E-01, EF = 5.00E+00 selected 
Table 20-7 [procedural items]: 
    HEP when procedures are available but are not used (item 5) 
    HEP = 5.00E-02, EF = 5.00E+00 selected 
    Procedure used without checkoff 
    Short list (<=10 items) (item 3) 
    HEP = 3.00E-03, EF = 3.00E+00 selected 
=> HEP omission (procedure not used) = 1.50E-02, EF = 9.74E+00 
=> HEP omission (procedure used) = 2.10E-03, EF := 3.00E+00 
=> HEP omission (total) = 1.69E-02, EF = 9.12E+00 
 
>> RBA (rule-based action) for error of commission 
Table 20-13 (Valve selection) 
    Clearly labeled, not in a group that have same shape, size, state and tag (item 1) 
    HEP = 1.00E-03, EF = 3.00E+00 selected 
Table 20-14 (Stuck valve detection) 
    Operation with a rising stem but no position indicator (item 3) 
    HEP = 5.00E-03, EF = 3.00E+00 selected 
=> HEP commission = 6.32E-03, EF = 2.61E+00 
 
=> Joined HEP (omission + commission) for maintenance = 2.28E-02; EF = 7.70E+00 
 
>> PSF (performance shaping factors) 
Table 20-15 [tagging levels]: 
    Tags are not accounted for individually 
    Nominal HEP used (level 2) 
Table 20-16 [stress/experience] 
    Skilled person (>6 months experience) 
    Stress level: optimum, step-by-step (item 2) 
=> PSF-modified HEP = 2.28E-02, EF = 7.70E+00 
 
>> RF (recovery factors) 
Table 20-22 [recovery factors] 
    Without written materials (item 2) 
    HEP divided by 2 since maintenance (item 10) 
    THERP RF = 1.00E-01, THERP RF EF = 5.00E+00 selected 
ASEP recovery factors 
    Post-mainteance or post-calibration testing 
    Item 6 selected 
    ASEP RF = 1.00E-02, ASEP RF EF = 1.00E+01 selected 
    The ASEP recovery factor suits better the action type: using ASEP RF 
=> RF = 1.00E-02, EF = 1.00E+01 
 
=> HEP for maintenance = 2.28E-04; EF = 2.17E+01 
 
----- TESTS (SFT/IFT) ----- 
 
>> RBA (rule-based action) for error of omission (test) 
Written materials: Yes 
Table 20-5 [preparation]: 
    Not relevant (written materials are licensed) 
Table 20-6 [administrative control]: 
    HEP that procedure will not be used (test, item 6): 
    HEP = 5.00E-02, EF = 5.00E+00 selected 
Table 20-7 [procedural items]: 
    HEP when procedures are available but are not used (item 5) 
    HEP = 5.00E-02, EF = 5.00E+00 selected 
    Procedure used without checkoff 
    Long list (>10 items) (item 4) 
    HEP = 1.00E-02, EF = 3.00E+00 selected 
=> HEP omission (procedure not used) = 2.50E-03, EF = 9.74E+00 
=> HEP omission (procedure used) = 9.50E-03, EF := 3.00E+00 
=> HEP omission (total) = 1.31E-02, EF = 3.86E+00 
 
=> Joined HEP (omission + commission) for tests = 2.10E-02; EF = 2.90E+00 
 
>> PSF (performance shaping factors) 
Table 20-15 [tagging levels]: 
    Tags are not accounted for individually 
    Nominal HEP used (level 2) 
Table 20-16 [stress/experience] 
    Skilled person (>6 months experience) 
    Stress level: optimum, step-by-step (item 2) 
=> PSF-modified HEP = 2.10E-02, EF = 2.90E+00 
 
>> RF (recovery factors) 
Table 20-22 [recovery factors] 
    Without written materials (item 2) 
    THERP RF = 2.00E-01, THERP RF EF = 5.00E+00 selected 
ASEP recovery factors 
    No appropriate ASEP recovery factors available 
    ASEP RF = 1.00E+00, ASEP RF EF = 0.00E+00 selected 
    The THERP recovery factor suits better the action type: using THERP RF 
=> RF = 2.00E-01, EF = 5.00E+00 
 
=> HEP for tests = 4.20E-03; EF = 6.88E+00 
 
>> Equivalent HEP (combines test and maintenance) 
   Maintenance frequency = 1.00E-01 
   Test frequency = 2.00E+00 
 
=> Equivalent HEP = 4.06E-03, EF = 6.83E+00 
 
>> Reduction factor 
     Ratio fault occurence / fault detection frequencies = 2.1 / 1 => HEP reduction factor = 8.07E-01 
 
=> Final HEP (median) = 3.27E-03, EF = 6.83E+00 
=> Final HEP (mean)   = 6.47E-03, EF = 6.83E+00