05000348/LER-2008-001, Regarding Emergency Diesel Generator 1B Exhaust Pipe Failure
| ML081300835 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 05/09/2008 |
| From: | Jerrica Johnson Southern Nuclear Operating Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| NL-08-0573 LER 08-001-00 | |
| Download: ML081300835 (7) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 10 CFR 50.73(a)(2)(v), Loss of Safety Function 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 |
| 3482008001R00 - NRC Website | |
text
May 9, 2008 Docket Nos.: 50-348 NL-08-0573 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Joseph M. Farley Nuclear Plant - Unit 1 Licensee Event Report 2008-001-00 Emergency Diesel Generator 1B Exhaust Pipe Failure Ladies and Gentlemen:
In accordance with the requirements of 10 CFR 50.73(a)(2)(i)(B) and 10 CFR 50.73(a)(2)(v)(D), Southern Nuclear Operating Company (SNC) is submitting the enclosed Licensee Event report.
This letter contains no NRC commitments. If you have any questions, please advise.
Sincerely, J. R. Johnson Vice President - Farley JRJ/CHM
Enclosures:
Unit 1 Licensee Event Report 2008-001-00 J. R. Johnson Vice President - Farley Southern Nuclear Operating Company, Inc.
Post Office Drawer 470 Ashford, Alabama 36312-0470 Tel 334.814.4511 Fax 334.814.4728
U. S. Nuclear Regulatory Commission NL-08-0573 Page 2 cc:
Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. J. R. Johnson, Vice President - Farley Mr. D. H. Jones, Vice President - Engineering RTYPE: CFA04.054; LC # 14747 U. S. Nuclear Regulatory Commission Mr. V. M. McCree, Acting Regional Administrator Mr. R. A. Jervey, NRR Project Manager - Farley Mr. E. L. Crowe, Senior Resident Inspector - Farley
Joseph M. Farley Nuclear Plant - Unit 1 Licensee Event Report 2008-001-00 Emergency Diesel Generator 1B Exhaust Pipe Failure Enclosure Unit 1 Licensee Event Report 2008-001-00
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION (9-2007)
LICENSEE EVENT REPORT (LER)
APPROVED BY OMB: NO. 3150-0104 EXPIRES: 08/31/2010
, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.
- 1. FACILITY NAME Joseph M Farley Nuclear Plant - Unit 1
- 2. DOCKET NUMBER 05000 348
- 3. PAGE 1 of 4
- 4. TITLE Emergency Diesel Generator 1B Exhaust Pipe Failure
- 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 DOCKET NUMBER 05000 03 13 2008 2008 - 001 - 00 05 09 2008 FACILITY NAME DOCKET NUMBER 05000
- 9. OPERATING MODE 1
- 10. POWER LEVEL 100
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply) 20.2201(b) 20.2203(a)(3)(i) 50.73(a)(2)(i)(C) 50.73(a)(2)(vii) 20.2201(d) 20.2203(a)(3)(ii) 50.73(a)(2)(ii)(A) 50.73(a)(2)(viii)(A) 20.2203(a)(1) 20.2203(a)(4) 50.73(a)(2)(ii)(B) 50.73(a)(2)(viii)(B) 20.2203(a)(2)(i) 50.36(c)(1)(i)(A) 50.73(a)(2)(iii) 50.73(a)(2)(ix)(A) 20.2203(a)(2)(ii) 50.36(c)(1)(ii)(A) 50.73(a)(2)(iv)(A) 50.73(a)(2)(x) 20.2203(a)(2)(iii) 50.36(c)(2) 50.73(a)(2)(v)(A) 73.71(a)(4) 20.2203(a)(2)(iv) 50.46(a)(3)(ii) 50.73(a)(2)(v)(B) 73.71(a)(5) 20.2203(a)(2)(v) 50.73(a)(2)(i)(A) 50.73(a)(2)(v)(C)
OTHER 20.2203(a)(2)(vi) 50.73(a)(2)(i)(B) 50.73(a)(2)(v)(D)
Specify in Abstract below or in (If more space is required, use additional copies of (If more space is required, use additional copies of NRC Form 366A) (17) PRINTED ON RECYCLED PAPER)
Corrective Action
The exhaust pipes on EDG 1B were seal welded. EDG 1B was returned to service on March 16, 2008 at 02:54 hours following enhanced functional testing.
Work order planning sequences for the two remaining EDGs which are scheduled for exhaust system replacement have been enhanced to require field welding of these flanges and post maintenance testing of the connections.
The 1C EDG and the 2C Site Black Out Diesel Generator are both Fairbanks Morse 38TD8-1/8 Opposed Piston diesel generators rated at 2,850 kW. Industry experience has shown that the exhaust systems on these diesel generators are not susceptible to the decarbonization effect seen on the larger PC2 diesels. Therefore, SNC does not have plans at this time to replace the exhaust system on these diesel generators.
Operating experience (OE) entry was made (OE 26462) to the industry informing them of the method used by the vendor in shipping the diesel generator exhaust manifolds and the lack of clear indication on the vendor drawing that field welding of the flange joint was required.
Additional Information
LER 2005-002-00 Unit 1 Technical Specification 3.8.1 Violation due to 1F Bus Synchroscope Failure LER 2007-001-00 Unit 1 Technical Specification 3.8.1 Violation Due to Failure of Breaker /
Mechanism-Operated Cell Switch