05000366/LER-2019-004, High Pressure Coolant Injection System Inoperable Due to Brief Loss of Power to HPCI Pump Flow Controller
| ML19289E222 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 10/16/2019 |
| From: | Dean E Southern Nuclear Operating Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NL-19-1264 LER 2019-004-00 | |
| Download: ML19289E222 (5) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(v)(0) 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability |
| 3662019004R00 - NRC Website | |
text
~ Southern Nuclear OCT 1 6 2019 Docket Nos.: 50-366 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 E. D. Dean Ill VIce President-Plant Hatch Edwin I. Hatch Nuclear Plant Unit 2 Licensee Event Report 2019-004-00 l'lant Edwin I. Hw.:h 11028 HaJch l'altway Nnnh lla.<tley,GA 31513
!112.537.5859 tel 912.360.2077 fax NL-19-1264 High Pressure Coolant Injection System Inoperable Due to Brief Loss of Power to HPCI Pump Flow Controller Ladies and Gentlemen:
In accordance with the requirements of 10 CFR 50. 73(a)(2)(v)(D), Southern Nuclear Operating Company hereby submits the enclosed Licensee Event Report.
This letter contains no NRC commitments. If you have any questions, please contact the Hatch Licensing Manager, Jimmy Collins at 912.537.2342.
Respectfully submitted, E. D. Dean Vice President - Hatch EDD/JEUSCM Enclosure: LER 2019-004-00 Cc:
Regional Administrator, Region II NRR Project Manager-Hatch Senior Resident Inspector - Hatch RTYPE: CHA02.004
Edwin I. Hatch Nuclear Plant Unit 1 and 2 Licensee Event Report 2019-004-00 High Pressure Coolant Injection System Inoperable Due to Brief Loss of Power to HPCI Pump Flow Controller Enclosure LER 201 9-004-00
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3.Page Edwin I. Hatch Nuclear Plant Unit 2 1
OF 3
05000 366
- 4. Title High Pressure Coolant Injection System Declared Inoperable Due to Brief Loss of Power to HPCI Pump Flow Controller
- 5. Event Date
- 6. LER Number
- 7. Report Date
- 8. Other Facilities Involved Month I
Sequential I Rav Doy Year Fadllly Name Docket Number Illy Yoar Year Number No.
Month 05000 Foclllly Name Docket Number 08 22 2019 2019. 004. 00 10 Ilo
~OI'f 05000
- 9. Operating Mode
- 11. This Report Is Submitted Pursuant to the Requirements of 10 CFR §: (Check all that apply)
D 20.22D1(b) 0 20.2203(a)(3)(i)
D 50.73(aX2)(iiXAl D S0.73(aX2)(viii)(A) 1 D 2o.2201(d)
D 20.2203(a)(3)(il) 0 S0.73(a)(2)(ii)(B) 0 S0.73(aX2)(viii)(B)
D 20.2203<*><1>
0 20 2203(aX4)
D S0.73(a)(2)(Ui)
D so 73(aX2)(ix)(A)
D 2D2203(a)(2)(i)
D 5D.36(c)(1)(i)(A) 0 S0.73(a)(2)(iv)(A) 0 50.73(aX2l(x)
- 10. Power Level 0 20.22D3(a)(2)(il) 0 SD.36(c)(1)(11)(A) 0 S0.73(a)(2)(v)(A)
D 73.71(a)(4) 0 2D.22D3(a)(2)(iii)
D 50 36(C)(2)
D S0.73(a)(2)(Y)(B) 0 73.71(a)(5) 0 20.2203(a)(2Xiv)
D 50 46(a)(3)(ii)
D S0.73(a)(2Xv)(C)
D 73.77(a)(1) 100 0 2D.2203(a)(2)(v) 0 S0.73(a)(2)(iXAl 0 50.73(a)(2)(v)(0) 0 73.77(aX2l(l)
D 2D.2203(B)(2Xvil 0 S0.73(a)(2)(iXBl 0 50.73(a)(2)(vii)
D 73.77(a)(2Xiil
-~l I~To-
- ~: I
' ~ ~ !*.. ~~ D S0.73(a)(2)(i)(C}
D Other (Specify In Abstract below or in
CORRECTIVE ACTIONS
The cause of the capacitor failure was not determined. Ceramic capacitors of this type are not known to fail at a specific frequency, and are not recommended for replacement on a periodic basis.
The HPCI turbine speed control power supply was removed from service, replaced, and the new power supply tested satisfactorily.
PREVIOUS SIMILAR EVENTS
A similar event. in which the Unit 1 HPCI system was declared inoperable due to a degraded inverter. occurred on February 8, 2017.
The HPCI inverter supplies power to the HPCI flow controller and power supply. HPCI was declared inoperable due to the degraded voltage condition. The degraded inverter was removed from service and replaced, and HPCI was returned to operable status. It should be noted that the only similarity between the event on February 8, 2017 and the referenced event is the degraded voltage condition. The causes of the degraded voltage condition were different NRC FORM 3&IA (IW*201B)
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