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  3. 6 rae pp 3132 problem 24 take information froim homework...

Question: 6 rae pp 3132 problem 24 take information froim homework...

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6. RAE, pp. 31-32, Problem 2.4. Take information froim homework statement from the RAE problem t, and answer the questions listed below in this a) Write an expresion for the Indvidual annual doce point vae a risk of an exposure accident, Rnd npression for information to calculate a , Rnd Note that with Consequence point value. Then use the given uence point vuenc o the absorbed dose point value by the numerical point value for the individual risk per year information about the uncertainties of these quantities, we could calculate a on uncertainties realistic estimate of the Risk, which would be based or distributions for each component in the Risk expression resulting in a Risk value with a total uncertainty or a uncertainties.r ideally a Risk distribution that incorporated the Toxicity Breathing Rate Absorption Fraction Exposure Timelyr Scenario Frequency] Death/gram-person Rind- b) Write an expression for and calculate a numerical point value for the societal risk, Rsoc, by using the information of the number of population exposed and the individual risk value calculated in a) for Rnd. We will use the fatality risk standard of 10tyr for involuntary risk of people in the community outside a plant or other facility. Comment on your calculated value with regard to acceptable for s 10lyr unaceptable for > 10 9yr based on this common involuntary fatality risk criterion. or c) Use the results of a) and b) to write an expression for and calculate, via the reciprocal of Risk, the odds of deathlyear due to exposure for Individual Risk and a similar expression and calculation of odds of death/year for Societal Risk. Societal Risk odds: 1/Rsoc Individual Risk odds: 1/Rn,-
d) Write an expression for and calculate to 3 sd (significant digits°, the f 10, the in units of hours corresponding to an individual annual fatality risk o common involuntary fatality risk criterion ifican t digits) the time exposure : 10 × 10-6gm( 5m)(0.1)(Time)| VE10 cancer death gm-person hr yr -)] Time
2 The Pailure Distibation 31 Useful life failures FIGURE 2.3 The bathtub curve 24 BATHTUB CURVE Ag important form of the hazard rate function is shown in Fig. 2.3. Because of its shape, it is commonly referred to as the bathtub curve. Systems having this haz- ard rate function experience decreasing failure rates early in their life cycle (infant ty). followed by a nearly constant failure rate (useful life), followed by an failure rate (wearout). This curve may be obtained, as shown later, as a composite of several failure distributions, or as shown in the following example, as of piecewise linear and constant failure rates. Table 2.1 summarizes some mortality), a function of the distinguishing features of the bathtub curv e. EXAMPLE 2.7. hazard rates: A simplified form of the bathtub curve is based upon linear and constant Ci Then 2c C1 2c1 where co. ci,2, and to are constants to be determined. Figure 2.4 portrays this hazard rate graphically. Appendix 2D derives R(t) from λ(t).
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