Beaver Valley Unit 1 commenced a Technical Specification required shutdown at
1415 hours0.0164 days <br />0.393 hours <br />0.00234 weeks <br />5.384075e-4 months <br /> due to Train B Solid State Protection System
inoperable. The condition was discovered during testing and the Unit is required to be in Mode 3 by
1846 hours0.0214 days <br />0.513 hours <br />0.00305 weeks <br />7.02403e-4 months <br />. Train A of Solid State Protection System remains
operable and in service. Investigation of the Solid State Protection problem is in progress.
The licensee believes that the problem is caused by a faulty memory card. They are continuing to investigate the problem. The unit was at 18% power at 1727 EDT on the way to mode 3.
The licensee notified the NRC Resident Inspector.
- * * UPDATE ON 5/27/06 AT 0114 EDT FROM R. GREEN TO A. COSTA * * *
Beaver Valley Unit 1 entered mode 3 at 1831 hours0.0212 days <br />0.509 hours <br />0.00303 weeks <br />6.966955e-4 months <br /> on 5/26/06. Train B Solid State Protection was repaired and tested satisfactorily. It was returned to OPERABLE status at 1915 hours0.0222 days <br />0.532 hours <br />0.00317 weeks <br />7.286575e-4 months <br /> on 5/26/06. The failure was in the memory portion of the universal logic card in the low power trip block circuitry. A root cause investigation is ongoing. All technical specifications action statements were exited when Train B Solid State Protection was declared OPERABLE. Reactor start up is planned for 0500 on 5/27/06.
The licensee will notify the NRC Resident Inspector. Notified R1DO (M. Gray).