05000336/LER-2015-001, Regarding Historical Oil Leakage from C RBCCW Pump Bearings Challenged Meeting Mission Time
| ML15175A194 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 06/16/2015 |
| From: | Daugherty J Dominion, Dominion Nuclear Connecticut |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 15-287 LER 15-001-00 | |
| Download: ML15175A194 (6) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 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)(i)(A), Completion of TS Shutdown 10 CFR 50.73(a)(2)(v), Loss of Safety Function |
| LER closed by | |
| IR 05000245/2016004 (1 February 2017) | |
| 3362015001R00 - NRC Website | |
text
Dominion Dominion Nuclear Connecticut, Inc.
Rope Ferry Rd., Waterford, CT 06385 Mailing Address: P.O. Box 128 Waterford, CT 06385 dom.com JUN 16-2015 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Serial No.
MPS Lic/LES Docket No.
License No.15-287 RO 50-336 DPR-65 DOMINION NUCLEAR CONNECTICUT, INC.
MILLSTONE POWER STATION UNIT 2 LICENSEE EVENT REPORT 2015-001-00 HISTORICAL OIL LEAKAGE FROM "C" RBCCW PUMP BEARINGS CHALLENGED MEETING MISSION TIME This letter forwards Licensee Event Report (LER) 2015-001-00 documenting an event at Millstone Power Station Unit 2 on April 17, 2015. This LER is being submitted pursuant to 10 CFR 50.73(a)(2)(i)(B).
If you have any questions or require additional information, please contact Mr. Thomas G.
Cleary at (860) 447-1791 x3232.
Sincerely, John R. Daugherty Site Vice President - Millstone Attachments: 1 Commitments made in this letter: None A-1
Serial No.15-287 Docket No. 50-336 Licensee Event Report 2015-001-00 Page 2 of 2 cc:
U.S. Nuclear Regulatory Commission Region I 2100 Renaissance Blvd, Suite 100 King of Prussia, PA 19406-2713 R. V. Guzman NRC Project Manager Millstone Units 2 and 3 U. S. Nuclear Regulatory Commission One White Flint North Mail Stop 08 C-2 11555 Rockville Pike Rockville, MD 20852-2738 NRC Senior Resident Inspector Millstone Power Station
Serial No.15-287 Docket No. 50-336 Licensee Event Report 2015-001-00 ATTACHMENT LICENSEE EVENT REPORT 2015-001-00 HISTORICAL OIL LEAKAGE FROM THE "C" RBCCW PUMP BEARINGS CHALLENGED MEETING MISSION TIME MILLSTONE POWER STATION UNIT 2 DOMINION NUCLEAR CONNECTICUT, INC.
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 01/31/2017
- 02-2014)
- .**.a
ý02-2014)Estimated burden per response to comply with this mandatory collection request: 80 hours9.259259e-4 days <br />0.0222 hours <br />1.322751e-4 weeks <br />3.044e-5 months <br />.
Reported lessons learned are incorporated into the licensing process and fed back to industry.
Send comments regarding burden estimate to the FOIA, Privacy and Information Collections LICENSEE EVENT REPORT (LER)
Branch (T-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by internet e-mail to Infocollects.Resource@nrc.gov, and to the Desk Officer, Office of Information and (See Page 2 for required number of Regulatory Affairs, NEOB-10202, (3150-0104), Office of Management and Budget, Washington, DC 20503. If a means used to impose an information collection does not display a currently valid OMB digits/characters for each block) control number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.
- 3. PAGE Millstone Power Station Unit 2 05000336 1 OF 3
- 4. TITLE Historical Oil Leakage from "C" RBCCW Pump Bearings Challenged Meeting Mission Time
- 5. EVENT DATE
- 6. LER NUMBER
[
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED MONTH DAY YEAR YEAR SEQUENTIAL REV MD FACLT NAME DOCKET NUMBER NUMBER NO.
05000 IFACILITY NAME DOCKET NUMBER 04 17 2015 2015 -
001
- - 00 06 16 2015 05000
- 9. OPERATING MODE
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR §: (Check all that apply)
[1 20.2201(b)
[I 20.2203(a)(3)(i) 0 50.73(a)(2)(i)(C)
D 50.73(a)(2)(vii)
F1 20.2201(d)
[1 20.2203(a)(3)(ii)
[D 50.73(a)(2)(ii)(A)
L] 50.73(a)(2)(viii)(A) 1
[
20.2203(a)(1)
LI 20.2203(a)(4)
[:] 50.73(a)(2)(ii)(B)
Ej 50.73(a)(2)(viii)(B)
_ 20.2203(a)(2)(i)
El 50.36(c)(1)(i)(A)
[D 50.73(a)(2)(iii)
LI 50.73(a)(2)(ix)(A)
- 10. POWER LEVEL LI 20.2203(a)(2)(ii)
[: 50.36(c)(1)(ii)(A)
[D 50.73(a)(2)(iv)(A)
[_
50.73(a)(2)(x)
[
20.2203(a)(2)(iii)
D 50.36(c)(2)
[D 50.73(a)(2)(v)(A)
[D 73.71(a)(4) 10 20.2203(a)(2)(iv)
LI 50.46(a)(3)(ii)
[_
50.73(a)(2)(v)(B)
LI 73.71(a)(5) 100 Ej 20.2203(a)(2)(v)
Ej 50.73(a)(2)(i)(A)
[L 50.73(a)(2)(v)(C)
[]
50.73(a)(2)(i)(B)
LI 50.73(a)(2)(v)(D)
Specify in Abstract below or in E]__
2020()2(i 07()2(i()[1 "C" RBCCW pump's mission time, except during a 118 hour0.00137 days <br />0.0328 hours <br />1.951058e-4 weeks <br />4.4899e-5 months <br /> period between 0120 on September 22, 2013 and 2339 on September 26, 2013, when only one RBCCW loop was available to perform the required safety functions of the RBCCW system, because the "B" RBCCW pump was removed from service for planned maintenance. Only one RBCCW loop is required to meet the system's safety function, and the "A" RBCCW pump was available in that period of time to meet the safety functions.
4. CORRECTIVE ACTION
Procedure OP-AA-1 02 has been revised to specify that any time a pump's mission time cannot be met due to oil leakage, the pump should be declared inoperable due to a degraded or non-conforming condition.
Additional corrective actions are being taken in accordance with the station's corrective action program.
5. PREVIOUS OCCURRENCES
None
- 6. Energy Industry Identification System (EIIS) codes:
Pump-P RBCCW-CC