An Open Forum Now Available

The NRC welcomes comments on the topics we’re blogging about. But we realize there are other topics you might want to talk about. This post serves as the Open Forum section of the NRC Blog. You may post comments here on any topic relevant to the role and mission of the NRC. Comments here are still moderated and must adhere to the Comment Guidelines. If we determine a comment on another post is more appropriate here, we’ll move it over. This post will stay open for comments and not be subject to the 30-day comment period of other posts. You can always find this post by clicking on the Open Forum category on the side bar.

Holly Harrington
NRC Blog Moderator

It’s Mole Day for the Whole Day at the NRC

6946377219_6486264c6f_zChemistry fans often refer to Oct. 23 as “Mole Day,” since the numbers 10 and 23 are part of a basic constant in chemistry, the mole. This unit describes how many atoms exist in a given sample of any substance, so scientists use moles to simplify lots of calculations. For example, when an average nuclear reactor first starts up its core has about 120,000 kilograms of uranium in its fuel. A mole of uranium weighs about 238 grams, so a brand-new core has about 504,000 moles of uranium. A plant scientist or NRC specialist would base some core calculations on a more exact definition of moles in the core.