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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 52879 | 31 July 2017 18:00:00 | 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | Unanalyzed Condition for Hot Leg Injection Scenarios | At 1400 (EDT), St. Lucie completed a review of Unit 1 Hot Leg Injection scenarios. St. Lucie Unit 1 was licensed with a Hot Leg Injection capability that relies upon manual actions to accomplish the function. This review concluded that some postulated single electrical train failure scenarios were not fully addressed in plant procedures. Because of the potential to extend Hot Leg Injection initiation beyond the analysis start time, St. Lucie is reporting this condition under 10 CFR 50.72(b)(3)(ii)(B). The affected off-normal procedures were immediately revised to include necessary instructions to restore power to selected valves during a postulated loss of electrical power to restore the Hot Leg Injection strategy. Unit 1 remained at 100% power. The NRC Resident Inspector has been notified. A review found this condition was not applicable for Unit 2. | ||
| ENS 49662 | 19 December 2013 18:20:00 | 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | Unanalyzed Condition Affecting Unit 2 Emergency Diesel Generators | At 1320 ET on December 19, 2013, Florida Power and Light identified that atmospheric conditions that had sustained high winds exceeding approximately 50 miles per hour from the ENE direction could result in inadequate heat removal to support continuous operation of the Unit 2 emergency diesel generators. Upon identification of this condition, an adverse condition monitoring plan was issued requiring implementation of compensatory measures to assure adequate emergency diesel generator cooling to support continuous operation of the U2 emergency diesel generators, should weather forecasts identify conditions that would likely result in this condition. This condition is reportable pursuant to 10 CFR 50.72(b)(3)(ii)(B). The NRC Resident Inspector has been notified of this condition. | Emergency Diesel Generator |