In March 2002, Unit 2 Reactor Zone Supply
Secondary Containment Isolation
Damper 2-DMP-64-14 failed in the open position due to the use of an improper lubricant in its
solenoid valve. During an extent of condition review of this
condition adverse to quality (i.e., defective material), the licensee determined that many of the
solenoid valves used to control the
secondary containment isolation
dampers for Units 1, 2, and 3 were the same model, and susceptible to the same failure mode, as the
solenoid valve for 2-DMP-64-14. According to
10 CFR 50, Appendix B, Criterion XVI, Corrective Action, requires that
conditions adverse to quality, such as defective material and equipment, are to be promptly identified and corrected. However, contrary to Criterion XVI, the licensee failed to correct this adverse condition to quality on Unit 1 when they inadvertently omitted replacing the Unit 1
solenoid valves when the Unit 2 and 3
solenoid valves were replaced. The licensee identified this omission during surveillance testing in September 2008, when both of the Unit 1 Reactor Zone Exhaust
Secondary Containment Isolation
Dampers failed open (1- DMP-64-42 and 43) due to the improper lubricant in their
solenoid valves. This finding was considered to be of very low safety significance because it only represented a degradation of the radiological barrier function of the reactor building
secondary containment. The licensee entered this finding into the
CAP as PER 152333
