The ANS Standards Committee has just published ANSI/ANS-19.6.1-2019, “Reload Startup Physics Tests for Pressurized Water Reactors” (revision of ANS-19.6.1-2011). The standard, approved December 19, 2019, provides guidance for verifying the nuclear characteristics of a commercial pressurized water reactor core following a refueling or other alteration of the reactor core for which nuclear design calculations are required. The standard provides the minimum acceptable startup physics test program, while recognizing that additional tests may be required by special design features of a particular core.
This 2019 revision of the standard moves discussion of the difference between review criteria and acceptance criteria from the appendix to the body of the standard, incorporates clarification on testing at the next power plateau, and includes other editorial changes. This standard does not reflect all test programs that have been approved by the U.S. Nuclear Regulatory Commission.
All ANS standards, including ANSI/ANS-19.6.1-2019, are available for purchase in the ANS Standards Store at www.techstreet.com/ans