05000219/LER-2014-005, Regarding Secondary Containment Declared Inoperable
| ML14337A045 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 11/18/2014 |
| From: | Dostal J Exelon Generation Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| RA-14-096 LER 14-005-00 | |
| Download: ML14337A045 (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)(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 |
| 2192014005R00 - NRC Website | |
text
ExEGenertion 10 CFR 60.7 RA-144.
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NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 01/31/2017 [0 -04)
(01-2014)
Estimated burden per response to comply with this mandatory collection request: 80 hours9.259259e-4 days <br />0.0222 hours <br />1.322751e-4 weeks <br />3.044e-5 months <br />.
Reported lessons learned are incorporated into the licensing process and fed back to industry.
Send comments regarding burden estimate to the FOIA, Pivacy and Information Collections LICENSEE EVENT RE RT (LER Branch (T-5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by SREPOR
)
internet e-mail to Infocollects.Resource@nrc.gov, and to the Desk Officer, Office of Information and (See Page 2 for required number of Regulatory Affairs, NEOB-10202, (3150-0104), Office of Management and Budget, Washington, DC for each block) 20503. If a means used to impose an information collection does not display a currently valid OMB digits/characters fcontrol number, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.
- 3. PAGE Oyster Creek, Unit 1 05000219 1 OF 3
- 4. TITLE Secondary Containment Declared Inoperable
- 5. EVENT DATE
- 6. LER NUMBER
[
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED MNH DAY YEAR YEr SQETA REV MIFACILITY NAME DOCKET NUMBER II I
I
/
MONTH DA YA SEQUMENTIAL MONTH DAY YEAR
/A ZIZY_
EZ1ZNI.W7NUM/E l
I I
lFACILITY NAME DOCKET NUMBER 09 19 2014 2014 005 00 11 18 2014 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)
El 20.2203(a)(3)(i)
El 50.73(a)(2)(i)(C)
El 50.73(a)(2)(vii)
Nl 20.2201(d)
El 20.2203(a)(3)(ii)
El 50.73(a)(2)(ii)(A)
El 50.73(a)(2)(viii)(A)
N El 20.2203(a)(1)
El 20.2203(a)(4)
El 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)
E] 50.73(a)(2)(iii)
El 50.73(a)(2)(ix)(A)
- 10. POWER LEVEL El 20.2203(a)(2)(ii)
El 50.36(c)(1)(ii)(A)
El 50.73(a)(2)(iv)(A)
El 50.73(a)(2)(x)
[E 20.2203(a)(2)(iii)
[3 50.36(c)(2)
El 50.73(a)(2)(v)(A)
El 73.71 (a)(4)
El 20.2203(a)(2)(iv)
El 50.46(a)(3)(ii)
El 50.73(a)(2)(v)(B)
El 73.71 (a)(5) 0 0E 20.2203(a)(2)(v)
El 50.73(a)(2)(i)(A)
[
50.73(a)(2)(v)(C)
El OTHER El 20.2203(a)(2)(vi)
[
50.73(a)(2)(i)(B)
El 50.73(a)(2)(v)(D)
Specity in Abstract below or in A technical evaluation was conducted to demonstrate that during the period that the seal on the equipment hub drain was not in place, the safety function of secondary containment was still in place. The evaluation determined that even with the additional opening of the 6" equipment hub drain, secondary containment requirements were met with significant margin. The calculation bounds the condition of the unsealed hub drain in the trunnion room; therefore, the safety function of secondary containment was not compromised by this condition.
Cause of Event
The Apparent Cause of this event was inadequate signage on the trunnion room door and drain covers. The only TCC tag was on the outside of the trunnion room door and with the door opened, the TCC tag was not clearly visible.
Contributing to this event was the individual removing the drain cover to utilize the drain without understanding the basis for the drain being covered, or ensuring proper controls were in-place to remove the cover.
Contributing to this event was a lack of a questioning attitude by the individual(s) who removed the drain cover.
Immediate Actions:
The TCC was reinstalled.
Additional TCC tags were affixed to each piece that comprised the TCC, and a tag was affixed to the inside and outside of the trunnion room door.
Signage was affixed to each piece of the TCC stating not to remove TCC without Shift Manager approval.
Corrective Actions
Perform a review of this event with Maintenance, Operations, and Radiation Protection departments. Specific emphasis on manipulating plant equipment without proper controlling documentation and/or Shift Manager permission.
Revise the library copy of the applicable preventive maintenance work order to be specific to label each component with TCC tag and signage to prevent removal without Shift Manager approval. Verify that the procedure requirements of CC-AA-1 12, "Temporary Configuration Changes," are met.
Previous Occurrences
None.
Component Data Components IEEE 805 System ID IEEE 803A Function Reactor Building NG DRN