05000318/LER-2006-001, Regarding Reactor Trip During Performance of Maintenance Clearance Order
| ML070180346 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 01/15/2007 |
| From: | Joseph E Pollock Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| LER 06-001-00 | |
| Download: ML070180346 (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)(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 |
| 3182006001R00 - NRC Website | |
text
Calvert Cliffs Nuclear Power Plant Constellation Generation Group 1650 Calvert Cliffs Parkway Lusby, Maryland 20657 0
Constellation Energy January 15, 2007 U.S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
SUBJECT:
Document Control Desk Calvert Cliffs Nuclear Power Plant Unit No. 2; Docket No. 50-318; License No. DPR 69 Licensee Event Report 2006-001 Reactor Trip During Performance of Maintenance Clearance Order is being sent to you as required by 10 CFR 50.73.
Should you have questions please contact Mr. Jay S. Gaines at (410) 495-5219.
The attached report regarding this report, Very truly yours, Joseph E. Pollock Plant General Manager JEP/ALS/bjd
Attachment:
As stated cc:
D. V. Pickett, NRC S. J. Collins, NRC Resident Inspector, NRC R. I. McLean, DNR C
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 06/3012007 (6-2004)
, the NRC may not conduct or sponsor, and a person is not required to respond to, the digits/characters for each block) information collection.
- 3. PAGE Calvert Cliffs Nuclear Power Plant, Unit 2 05000 318 1 OF 004
- 4. TITLE Reactor Trip During Performance of Maintenance Clearance Order
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED MONTH DAY YEAR YEAR SEQUENTIAL REV MONTH DAY YEAR 5FAC0LITYNAME DOCKET NUMBER NUMBER NO.
05000 FACILITY NAME DOCKET NUMBER 11 16 2006 2006 001 -
00 01 15 2007 05000
- 9. OPERATING MODE
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply)
[1 20.2201(b)
El 20.2203(a)(3)(i)
El 50.73(a)(2)(i)(C)
El 50.73(a)(2)(vii)
[] 20.2201(d)
[I 20.2203(a)(3)(ii)
El 50.73(a)(2)(ii)(A)
El 50.73(a)(2)(viii)(A)
El 20.2203(a)(1)
El 20.2203(a)(4)
[I 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)
El 50.73(a)(2)(ix)(A)
- 10. POWER LEVEL El 20.2203(a)(2)(ii)
[I 50.36(c)(1)(ii)(A)
Z 50.73(a)(2)(iv)(A)
El 50.73(a)(2)(x)
E-20.2203(a)(2)(iii)
[I 50.36(c)(2)
El 50,73(a)(2)(v)(A) 1-73.71(a)(4)
El 20.2203(a)(2)(iv)
[I 50.46(a)(3)(ii)
El 50.73(a)(2)(v)(B)
[3 73.71(a)(5) 100 El 20.2203(a)(2)(v)
[] 50.73(a)(2)(i)(A)
[1 50.73(a)(2)(v)(C)
El OTHER El 20.2203(a)(2)(vi)
El 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 NRC Form 366A)
B.
Interim compensatory actions were established to require additional controls whenever an electrical isolation device is used in support of any clearance order.
C.
The PORV (2ERV-402), PSV (2RV200), and Quench Tank #21 Rupture Disc, were replaced prior to returning Unit 2 to power.
V.
ADDITIONAL INFORMATION
A.
Component Identification IEEE 803 IEEE 805 Component EIIS Function System ID Main Turbine Governor Valves V
TA Main Turbine Intercept Valves V
TA Power Operated Relief Valves 20 AB Disconnect 2DISC2D1502 DISC EJ Quench Tank #21 Rupture Disc RPD AB Pressurizer Safety Valves RV AB B.
Previous Occurrences
A review of Calvert Cliffs' events over the past several years was performed. No previous occurrences were identified involving a reactor trip due to inadequate tagging clearances.