Home > NRC Library > ADAMS Public Documents

Abnormal Occurrence 50-289/75-21:on 750625,coolant temp trip bistable channel C failed to trip during test of reactor protection sys.Caused by defective printed circuit board solder joint in signal converter.

Accession Number: ML19210A232

Date Released: Monday, August 12, 2019

Package Contents

The following links on this page are to Adobe Portable Document Format (PDF) files. To obtain a free viewer for displaying this format, see our Plugins, Viewers, and Other Tools.

• ML19210A231 - Abnormal Occurrence 50-289/75-21:on 750625,coolant temp trip bistable channel C failed to trip during test of reactor protection sys.Caused by defective printed circuit board solder joint in signal converter. (4 page(s), 7/3/1975)
• ML19210A235 - Abnormal Occurrence 75-21:on 750625,reactor protection sys channel C failed during surveillance test.Caused by coolant temp trip bistable failure to trip due to component failure in signal converter. (1 page(s), 6/25/1975)