* Record $16 bln 30Y bond sale concludes November refunding

* Fed's Plosser sees no near-term inflation threat

* Weekly jobless claims fall more than expected

* Mortgage applications rise as refinancings jump

(Updates market action, adds quote, byline)

By Richard Leong

NEW YORK, Nov 12 (Reuters) - U.S. government debt prices rose on Thursday as investors prepare for a record supply of 30-year bonds, the last leg of this week's $81 billion quarterly refunding.

Most analysts predict solid demand for the $16 billion in 30-year Treasuries, the longest U.S. government debt maturity, following strong results at the auctions of three-year and 10-year notes earlier this week.