Risk Analysis and Management Problems: Fire Protection

According to the NFPA 59A standard: "Provisions shall be made as follows to minimize the possibility of damaging effects of fire reaching beyond a property line that can be built upon and that would result in a distinct hazard." (a) 5 kw/m2 at the nearest point located outside the owner's property line that, at the time of citing, is used for outdoor assembly by groups of 50 or more persons, for a fire over an impounding area containing volume V of LNG (liquid natural gas). (b) 30 kw/m2 at a property line that can be built upon for a fire over an impounding area containing a volume V of LNG." According to Lee's "Chemical Process Safety" ( see Handout #8) ) human and structural fra... click for more

Risk Analysis and Management: Fragility versus Loads and Fire Explosion Safety Issues

1. A propane tank is located 100 m away from the nearest buildings. The fragility to explosion can be expressed by p = 0 for I < 0.7 MPa • s p = aI for 0.7 < I < 1.3 MPa • s p = 1 for I > 1.3 MPa • s Accounting for various release and ignition scenarios, including uncertainties, the estimated probability distribution of impulses resulting from such explosions is given by the following set of values: I (MPa • s) 0.1 0.3 0.5 0.7 0.9 1.2 pload 0.06 0.1 0.4 0.3 0.1 0.04 Supposing that you can improve the building so that you can affect the threshold of damage, increasing it above 0.7 MPa • s, and supposing the high end at 1.3 MPa • s remains the same, and so is the linear in-... click for more

Risk Analysis and Management Fault tolerant systems Nuclear Power Plant Safety

2. A fault-tolerant nuclear reactor protection system consists of 3 processors and 6 memories. The system will fail if (a) any 2 of the 3 processors fail, or (b) any 2 of the 6 memories fail. The nominal failure rates of these processors and memories, provided by the manufacturers, are 1 per 10,000 hours and 1 per 2,000 hours respectively. (a) Calculate the probability that the system will fail in 3,000 hours. (b) Supposing no failure of any component occurs in 5,000 hours of operation. What would be your revised estimate of failure rates of the components in your system?

Rates of Drug Absorption: Pharmacokinetics

The body's absorption of medicine is often modeled by a formula that depends upon a person's weight. find such a model/formula. Using the formula, find expressions for the rate of absorption for each of the following weights: 100 lbs., 120 lbs., 150 lbs., and 200 lbs. Give your opinion regarding the accuracy/dependability of these types of models. Reorganize the formula so it is solved for the weight rather than the rate. Choose 5 different rates of absorption and use your formula to find the body weights that are associated with each rate. I have looked under pharmacokinetics for help, I really dont understand this, is it possible for this to be broken down.

Mass of Compound Needed to Prepare 1 oz of a 10% Solution

Hydroquinone, USP 1,4-Benzenediol; 1,4-Dihydroxybenzene C6H6O2 F.W. 110.11 CAS 123-31-9 Chemical Specifications: Assay (C6H6O2) 99.0-100.5% Melting Range 172°-174°C MAXIMUM LIMITS Residue on Ignition 0.5% Water 0.5% Organic Volatile Impurities To pass test Shipping Information: Hydroquinone, solid, 6.1, UN2662, PG III Storage Information: How much compound is needed to prepare 1 oz of 10% hydroquinone solution ?