I don't know why you're so insistent on asking a non-lawyer for legal advice. The license says "NonCommercial means not primarily intended for or directed towards commercial advantage or monetary compensation", so it depends on your reasons for reading the code (and it doesn't matter whether you do it at work or elsewhere).

The part you quoted is from the definition of "NonCommercial". The way "NonCommercial" is then used is:

    the Licensor hereby grants You ... to ...

    a. reproduce and Share the Licensed Material,
       in whole or in part, for NonCommercial purposes

    b. produce, reproduce, and Share Adapted Material
       for NonCommercial purposes 

As you can see, it always talks about sharing the content which can only be done for NonCommercial reasons. If it wouldn't only apply to sharing but to any type of usage, why would sharing be mentioned in every paragraph?

Also, in my experience, a lawyer would use "or Share" and not "and Share" if they wanted to express that the act of "reproducing" alone (whatever that means) is enough to fall under the license, even if no sharing would occur.

So my feeling is still that the license deals with sharing. Not with act of using.