05000317/LER-2004-002, Re Vital Bus Inoperable Due to Scaffold Installation
| ML043380018 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 11/29/2004 |
| From: | Holm D Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| LER 04-002-00 | |
| Download: ML043380018 (6) | |
| 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 |
| 3172004002R00 - NRC Website | |
text
Calvert Cliffs Nuclear Power Plant Constellation Generation Group, LLC 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 Constellation I
Energy Group November 29, 2004 U.S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
SUBJECT:
Document Control Desk Calvert Cliffs Nuclear Power Plant Unit No. 1; Docket No. 50-317; License No. DPR 53 Licensee Event Report 2004-002 Vital Bus Inoperable Due to Scaffold Installation The attached report is being sent to you as required under 10 CFR 50.73 guidelines. Should you have questions regarding this report, we will be pleased to discuss them with you.
Very truly your Dave A. Holm Plant General Manager DAH/JTJ/bjd
Attachment:
As stated cc:
J. Petro, Esquire J. E. Silberg, Esquire R. V. Guzman, NRC S. J. Collins, NRC Resident Inspector, NRC R. 1. McLean, DNR
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 06/3012007
, the NRC may digitscharacters for each block) noondut or sponsor, and a person is not required to respond to, the
- 3. PAGE Calvert Cliffs Nuclear Power Plant 05000 317 1 OF 005
- 4. TITLE Vital Bus Inoperable Due to Scaffold Installation
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED I iiFACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR SEQUENTIAL REV MONTH DAY YEAR 05000 MOT DAY YEA YEA NUMBER NO.
01 22 2004 2004 - 002 -
00 11 29 2004 I 05000
- 9. OPERATING MODE
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check allthat apply)
El 20.2201(b)
Cl 20.2203(a)(3)(i)
El 50.73(a)(2)(i)(C)
Dl 50.73(a)(2)(vii)
El 20.2201(d)
El 20.2203(a)(3)(ii)
El 50.73(a)(2)(ii)(A)
[I 50.73(a)(2)(viii)(A)
El 20.2203(a)(1)
El 20.2203(a)(4) 0 50.73(a)(2)(ii)(B)
El 50.73(a)(2)(viii)(B)
El 20.2203(a)(2)(i)
El 50.36(c)(1)(i)(A)
El 50.73(a)(2)(iii) 0 50.73(a)(2)(ix)(A)
- 10. POWER LEVEL 0 20.2203(a)(2)(ii)
El 50.36(c)(1)(ii)(A)
El 50.73(a)(2)(iv)(A)
E 50.73(a)(2)(x)
El 20.2203(a)(2)(iii)
El 50.36(c)(2)
El 50.73(a)(2)(v)(A)
El 73.71(a)(4) 0l 20.2203(a)(2)(iv)
El 50.46(a)(3)(ii)
D 50.73(a)(2)(v)(B)
El 73.71(a)(5) 100 El 20.2203(a)(2)(v)
Dl 50.73(a)(2)(i)(A)
El 50.73(a)(2)(v)(C)
El OTHER E 20.2203(a)(2)(vi) 0 50.73(a)(2)(i)(B)
El 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 (If more space is required, use additional copies of (if more space is required, use additional copies of NRC Form 366A) cause analysis performed for the September 14 event identified the following corrective actions that will apply to any scaffold built in safety-related areas.
- 1.
A CCNPP Supervisor will attend the pre-job brief to ensure the brief covers the manner in which scaffold is seismically secured.
- 2.
Prior to the newly erected scaffold being left unattended, the scaffold will be independently verified to be seismically braced by CCNPP supervision or design engineering.
- 3.
The CCNPP scaffold procedure is being changed to provide scaffold crews clearer guidance on bracing, distance to safety-related equipment, and thermal growth effects.
V.
ADDITIONAL INFORMATION
A.
Component Failures
Component 14A 480V AC Load Center IEEE 803 EIIS Function BU IEEE 805 System ID ED B.
Previous Occurrences
No other events of this type have occurred at Calvert Cliffs Nuclear Power Plant.