05000374/LER-2012-001, Regarding 2B Diesel Generator Declared Inoperable Due to Excessive Air Start Receiver Blowdown Caused by a Degraded Drain Valve
| ML12318A187 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 10/30/2012 |
| From: | Vinyard H Exelon Generation Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RA12-053 LER 12-001-00 | |
| Download: ML12318A187 (4) | |
| 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)(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 |
| 3742012001R00 - NRC Website | |
text
,1Exelon Generation LaSalle Station 2601 North 21st Road Marseilles, IL 61341 815 415 2000 Telephone www.exeloncorp.comn 10 CFR 50.73 RA12-053 October 30, 2012 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 LaSalle County Station, Unit 2 Facility Operating License No. NPF-18 NRC Docket No. 50-374
Subject:
Licensee Event Report 2012-001-00 In accordance with 10 CFR 50.73(a)(2XvXD), Exelon Generation Company (EGC), LLC, is submitting Unit 2 Licensee Event Report Number 2012-001-00.
There are no regulatory commitments in this report. Should you have any questions concerning this report, please contact Mr. Stephen T. Shields, Acting Regulatory Assurance Manager at (815) 415-2811.
Respectfully, Harold T. Vinyard Plant Manager LaSalle County Station
Enclosure:
Licensee Event Report cc:
Regional Administrator - NRC Region III NRC Senior Resident Inspector - LaSalle County Station
-~~
0-li
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 10/31/2013 (10-2010)
, the NRC may digits/characters for each block) not conduct or sponsor, and a person is not required to respond to, the digis/carater foreac blck)information collection.
- 3. PAGE LaSalle County Station, Unit 2 05000374 1 OF 3
- 4. TITLE 2B Diesel Generator Declared Inoperable Due to Excessive Air Start Receiver Blowdown Caused by a Degraded Drain Valve
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED S
IFACILITY NAME DOCKET NUMBER MNhIDY YA YERSEQUENTIAL REV MONTH DAY YEAR N/A N/A MONTH DAY YEAR YEAR NUMBER NO.
M Y
FACILITY NAME DOCKET NUMBER 08 31 2012 2012 001 00 10 30 2012 N/A N/A
- 9. OPERATING MODE
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR §: (Check all that apply)
El 20.2201(b)
[I 20.2203(a)(3)(i)
[I 50.73(a)(2)(i)(C)
El 50.73(a)(2)(vii) 001 El 20.2201(d)
[l 20.2203(a)(3)(ii)
[I 50.73(a)(2)(ii)(A)
C] 50.73(a)(2Xviii)(A) o 20.2203(a)(1)
[I 20.2203(aX4)
[I 50.73(a)(2)(ii)(B)
[I 50.73(a)(2)(viii)(B)
El 20.2203(a)(2)(i)
[I 50.36(c)(I1Xi)(A) 0 50.73(a)(2)(iii)
El 50.73(a)(2)(ix)(A)
- 10. POWER LEVEL El 20.2203(a)(2Xii) 0l 50.36(c)(1)(ii)(A)
CD 50.73(a)(2)(iv)(A)
[] 50.73(a)(2)(x)
[I 20.2203(a)(2)(iii)
El 50.36(c)(2)
[I 50.73(a)(2)(v)(A)
El 73.71(a)(4) 100 C1 20.2203(a)(2)(iv) 0l 50.46(a)(3)(ii)
[I 50.73(a)(2)(v)(B)
El 73.71(a)(5)
[I 20.2203(a)(2)(v)
[I 50.73(a)(2)(i)(A)
Cl 50.73(a)(2)(v)(C)
El OTHER 0l 20.2203(a)(2)(vi)
[3 50.73(a)(2)(i)(B) 0 50.73(a)(2)(v)(D)
Specify in Abstract below or in
E. CORRECTIVE ACTIONS
The receiver drain valve was fully closed, and the A train starting air compressor repressurized the A system receiver.
The receiver drain valve was replaced on September 14, 2012.
F.
PREVIOUS OCCURRENCES
A search of the LER database going back 10 years found no previous occurrences where low starting air pressure caused the 2B DG to be declared inoperable.
G. COMPONENT FAILURE DATA
3/4 inch, 2-way ball valve, Pittsburgh Brass MFG, Part # SPE-D5Q-G