05000338/LER-2008-001, Two Service Water Pumps Inoperable Greater than Technical Specification Allowed Completion Time
| ML081750526 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 06/13/2008 |
| From: | Stoddard D Virginia Electric & Power Co (VEPCO) |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 08-0338 LER 08-001-00 | |
| Download: ML081750526 (5) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 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 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications |
| 3382008001R00 - NRC Website | |
text
10CFR50.73 Virginia Electric and Power Company North Anna Power Station P. 0. Box 402 Mineral, Virginia 23117 June 13, 2008 U. S. Nuclear Regulatory Commission Serial No.:
08-0338 Attention: Document Control Desk NAPS:
JHL Washington, D1. C. 20555-0001 Docket Nos.: 50-338, 339 License Nos.:NPF-4, 7
Dear Sirs:
Pursuant to 10CFR50.73, Virginia Electric and Power Company hereby submits the following revised Licensee Event Report applicable to North Anna Power Station Units 1 and 2.
Report No. 50-338, 339/2008-001 -00 This report has been reviewed by the Facility Safety Review Committee and will be forwarded to the Management Safety Review Committee for its review.
Sincerely, Daniel G. Stoddard, P.E.
Site Vice President North Anna Power Station Enclosure Commitments contained in this letter: None cc:
United States Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW, Suite 23T85 Atlanta, Georgia 30303-8931 NRC Senior Resident Inspector North Anna Power Station
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSIO APPROVED BY OMB NO. 3150-0104 EXPIRES: 8/31/2010 (9-2007)
, the NRC may digits/characters for each block) not conduct or sponsor, and a person is not required to respond to, the information collection.
- 3. PAGE NORTH ANNA POWER STATION, UNIT 1 05000 338 1 OF4
- 4. TITLE Two Service Water Pumps Inoperable Greater Than Technical Specification Allowed Completion Time
- 5. EVENT DATE
- 6. LER NUMBER I_7.
MONTH DAY YEAR YEAR ISEQUENTIAL REV I MONTH NUMBER NO.I DOCUMENTNUMBER 05000339 04 1 17 1 2008 1 2008 001 00 1 06 DOCUMENTNUMBER 05000
- 9. OPERATING MODE 1
- 10. POWER LEVEL 100%
LI El El E]
El F-1 QI El El
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR §: (Check all that apply) 20.2201(b)
E]
20.2203(a)(3)(i)
E]
50.73(a)(2)(i)(C)
[]
50.73(a)(2)(vii) 20.2201(d)
LI 20.2203(a)(3)(ii)
L] 50.73(a)(2)(ii)(A)
E] 50.73(a)(2)(viii)(A) 20.2203(a)(1)
LI 20.2203(a)(4)
LI 50.73(a)(2)(ii)(B)
[]
50.73(a)(2)(viii)(B) 20.2203(a)(2)(i)
E]
50.36(c)(1)(i)(A)
LI 50.73(a)(2)(iii)
LI 50.73(a)(2)(ix)(A) 20.2203(a)(2)(ii)
L] 50.36(c)(1)(ii)(A)
LI 50.73(a)(2)(iv)(A)
L-50.73(a)(2)(x) 20.2203(a)(2)(iii)
E]
50.36(c)(2)
[]
50.73(a)(2)(v)(A)
I 73.71(a)(4) 20.2203(a)(2)(iv)
LI 50.46(a)(3)(ii)
LI 50.73(a)(2)(v)(B)
I 73.71 (a)(5) 20.2203(a)(2)(v)
LI 50.73(a)(2)(i)(A)
LI 50.73(a)(2)(v)(C)
LI OTHER 20.2203(a)(2)(vi)
M 50.73(a)(2)(i)(B)
LI 50.73(a)(2)(v)(D)
F
- 12. LICENSEE CONTACT FOR THIS LER FACILITY NAME
. TELEPHONE NUMBER (Include Area Code)
E. Hendrixson, Director Station Safety and Licensing1 (540) 894-2108CAUSE SYSTEM COMPONENT F
RMANU-REPORTABLE
CAUSE
SYSTEM COMPONENT MANU-REPORTABLE FACTURER TO EPIX FACTURER TO EPIX E
EK DG F010 Y
- 14. SUPPLEMENTAL REPORT EXPECTED
- 15. EXPECTED MONTH SUBMISSION LI YES (if yes, complete 15. EXPECTED SUBMISSION DATE)
[]
NO DATE ABSTRACT (Limit to 1400 spaces, i.e., approximately 15 single-spaced typewritten lines)
On March 24, 2008, with Units 1 and 2 in Mode 1 at 100% power, planned preventive maintenance commenced on the Unit 2 "H" (2H) Emergency Diesel Generator (EDG). On March 29, 2008, the 2H EDG was returned to operable. On April 1, 2008, the Unit 1 "B" SW pump was removed from service for maintenance. On April 5, 2008, excessive oil leakage was identified on the 2H EDG. The 2H EDG was declared inoperable. The oil leakage was due to 2-EG-P-4H, standby lube oil circulating pump, pushing oil to the engine upper crank line overfilling the engine upper pistons. With the 2H EDG inoperable, the Unit 2 "A" Service Water (SW) Pump was considered inoperable. Consequently, two SW pumps were inoperable for longer than the Technical Specification (TS) allowed completion time. Therefore, this event is reportable pursuant to 10 CFR 50.73(a)(2)(i)(B) as an operation or condition prohibited by Technical Specifications. The cause for having two SW pumps inoperable greater than the allowed TS completion time was not knowing that the 2H EDG was inoperable because of the installation of the incorrect gear set on standby lube oil circulating pump 2-EG-P-4H during the maintenance outage. Maintenance activities were completed on the Unit 1 "B" SW pump and 2H EDG and the equipment was returned to operable. A PRA analysis was performed and determined that the core damage probability associated with the event was low.
NRC FORM 366 (9-2007)
PRINTED ON RECYCLED PAPER (If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of NRC Form 366A) (17)
5.0 ADDITIONAL CORRECTIVE ACTIONS
Maintenance activities were completed on the Unit 1 "B" SW pump and 2H EDG and the equipment was returned to operable status.
6.0 ACTIONS TO PREVENT RECURRENCE Corrective actions associated with the incorrect gear set being installed in the standby lube oil circulating pump are being tracked with in the Corrective Action Program.
7.0 SIMILAR EVENTS
LER 50-338, 339/2000-002-00 dated April 27, 2000, identified that two service water
"'pumps were inoperable for a timeframe greater than the Technical Specification completion time due to inoperability of both Unit 1 EDGs.
8.0 ADDITIONAL INFORMATION
Description: Emergency Diesel Generators Manufacturer: Fairbanks Morse Model No.: 38TD8.125PRINTED ON RECYCLED PAPER