Develop an answer to each of the following explosive related questions, using at least 200 words total for parts a and b.
The DOT regulation at 49 C.F.R. §177.835(a) requires shippers and carriers to load and unload explosives from a motor vehicle only when the engine is not operating. What is the most likely reason DOT prohibits operation of the vehicle's engine during these processes?

During an inspection of an abandoned site, a fire marshal discovers the presence of several dynamite sticks within a locked shed attached to a warehouse. Although some sticks are packed within a wooden box, others are lying on shelves. On checking the city's records, the fire marshal discovers that the building was abandoned 22 years earlier. What immediate actions should the marshal take to protect public health, safety, and the environment? Aside from the explosive nature, discuss the health effects associated with its component nitroglycerin.

Discuss the nuclear reactions within the reactor of a nuclear power plant? Contrast the Three Mile Island, Chernobyl, and Fukushima Da-Ichi incidents with respect to the cause of the incident and radiation levels measured after the incident.

Your response must be at least 200 words in length.