Okay, im doing my Physics assignment on Pressurized Water Reactors and came across the statement:
"The use of water as a moderator is an important safety feature of Pressurized Water Reactors as any increase in temperature causes the water to expand and become less dense; thereby reducing the extent to which neutrons are slowed down and hence reducing the reactivity in the reactor. Therefore, if reactivity increases beyond normal, the reduced moderation of neutrons will cause the chain reaction to slow down, producing less heat. "
I thought the reduced moderation of neutrons would speed the chain reaction up, since wont the radioactive material react more quickly if the neutrons are moving quicker?
Please Help!!
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