05000335/LER-2019-003, Inoperability of Emergency Diesel Generator Due to Cracked Crankshaft
| ML19301D252 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 10/28/2019 |
| From: | Deboer D Florida Power & Light Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| L-2019-195 LER 2019-003-00 | |
| Download: ML19301D252 (4) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(ii)(A), Seriously Degraded 10 CFR 50.73(a)(2)(viii)(A) 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2)(viii)(B) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(ix)(A) 10 CFR 50.73(a)(2)(iv)(A), System Actuation 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor 10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(i) |
| 3352019003R00 - NRC Website | |
text
U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555 Re:
St. Lucie Unit 1 Docket No. 50-335 Reportable Event 2019-003-00 Date of Event: August 30, 2019 October 28, 2019 Inoperability of Emergency Diesel Generator due to Cracked Crankshaft L-2019-195 10 CFR 50.73 Licensee Event Report 2019-003 is being submitted pursuant to the requirements of 10 CFR 50.73 to provide notification of the subject event.
Respectfully, Daniel DeBoer Site Director St. Lucie Plant DD/res Attachment cc:
St. Lucie NRC Senior Resident Inspector St. Lucie NRC Program Manager Florida Power & Light Company 650i S. Ocean Drive, Jensen Beach, FL 34957
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION (04-2018)
LICENSEE EVENT REPORT (LER)
(See Page 2 for required number of digits/characters for each block)
(See NUREG-1022, R.3 for instruction and guidance for completing this form http://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1022/r3/)
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- 1. FACILITY NAME St. Lucie Unit 1
- 2. DOCKET NUMBER 05000335
- 3. PAGE 1 OF 3
- 4. TITLE Inoperability of Emergency Diesel Generator due to Cracked Crankshaft
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED MONTH DAY YEAR YEAR SEQUENTIAL NUMBER REV NO.
MONTH DAY YEAR FACILITY NAME n/a DOCKET NUMBER 05000 8
30 2019 2019 -
003
- - 00 10 28 2019 FACILITY NAME n/a DOCKET NUMBER 05000
- 9. OPERATING MODE
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR §: (Check all that apply) 1 20.2201(b) 20.2203(a)(3)(i) 50.73(a)(2)(ii)(A) 50.73(a)(2)(viii)(A) 20.2201(d) 20.2203(a)(3)(ii) 50.73(a)(2)(ii)(B) 50.73(a)(2)(viii)(B) 20.2203(a)(1) 20.2203(a)(4) 50.73(a)(2)(iii) 50.73(a)(2)(ix)(A) 20.2203(a)(2)(i) 50.36(c)(1)(i)(A) 50.73(a)(2)(iv)(A) 50.73(a)(2)(x)
- 10. POWER LEVEL 20.2203(a)(2)(ii) 50.36(c)(1)(ii)(A) 50.73(a)(2)(v)(A) 73.71(a)(4) 100%
20.2203(a)(2)(iii) 50.36(c)(2) 50.73(a)(2)(v)(B) 73.71(a)(5) 20.2203(a)(2)(iv) 50.46(a)(3)(ii) 50.73(a)(2)(v)(C) 73.77(a)(1) 20.2203(a)(2)(v) 50.73(a)(2)(i)(A) 50.73(a)(2)(v)(D) 73.77(a)(2)(i) 20.2203(a)(2)(vi) 50.73(a)(2)(i)(B) 50.73(a)(2)(vii) 73.77(a)(2)(ii) 50.73(a)(2)(i)(C)
OTHER Specify in Abstract below or in Page 3 of 3 Safety Significance of the Event The EDGs are required for accident mitigation and safe shutdown during loss of offsite power (LOOP) scenarios. During the time period of assumed inoperability, Offsite power remained available, and the St. Lucie station blackout (SBO) crosstie remained operable, so the Unit 2 EDGs were available if needed. Based on the diverse methods for supplying alternating current (AC) power at the site, this condition had no major impact on the health and safety of the public.
Corrective Actions
- 1. The 1B2 engine was repaired, inspections were completed satisfactorily on the 1B1 engine, and the 1B EDG was returned to service.
- 2. Extent of conditions inspections for potentially affected EDGs are scheduled.
Failed Components Identified Name:
DIESEL GENERATOR 1B Manufacturer:
GM Electro-Motive Division (EMD)
Model:
General Motors Series 645 Stationary Diesel Power Unit Tag:
DSL GEN 1B Part:
Crankshaft (12 cylinder)
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