05000445/LER-2011-002, Regarding Containment Personnel Airlock (Pal) Door Inoperable
| ML11327A030 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 11/16/2011 |
| From: | Flores R, Madden F Luminant Generation Co, Luminant Power |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| CP-201101512, TXX-11124 LER 11-002-00 | |
| Download: ML11327A030 (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)(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 |
| 4452011002R00 - NRC Website | |
text
Rafael Flores Senior Vice President
& Chief Nuclear Officer Rafael.flores@Luminant.com Luminant Power P 0 Box 1002 6322 North FM 56 Glen Rose, TX 76043 Luminant T 254 897 5550 C 817 559 0403 F 254 897 6652 CP-201101512 Log# TXX-11124 Ref. #
November 16, 2011 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555
SUBJECT:
COMANCHE PEAK NUCLEAR POWER PLANT DOCKET NO. 50-445 LICENSEE EVENT REPORT 445/11-002-00, UNIT 1 CONTAINMENT PERSONNEL AIRLOCK (PAL) DOOR INOPERABLE
Dear Sir or Madam:
Enclosed is Licensee Event Report (LER) 445/11-002-00, "Unit 1 Containment Personnel Airlock (PAL)
Door Inoperable," for Comanche Peak Nuclear Power Plant (CPNPP) Unit 1.
This letter contains no new regulatory commitments regarding CPNPP Unit 1.
Should you have any questions concerning this submittal, please contact Mr. Tim Hope, Manager, Nuclear Licensing, at (254) 897-6370.
Sincerely, Luminant Generation Company LLC Rafael Flores By:4
,22?2wL y :Fed W. Madden Director, Oversight & Regulatory Affairs A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway Comanche Peak Diablo Canyon-Palo Verde. San Onofre. South Texas Project Wolf Creek
U.S. Nuclear Regulatory Commission TXX-11124 Page 2 11/16/2011 Enclosure - LER 1-11-002-00 Unit 1 Containment Personnel Airlock (PAL) Door Inoperable c -
E. E. Collins, Region IV B. K. Singal, NRR Resident Inspectors, Comanche Peak
Enclosure to TXX-11124 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 information collection.
- 3. PAGE Comanche Peak Nuclear Power Plant (CPNPP) Unit 1 05000445 1 OF 5
- 4. TITLE Unit 1 Containment Personnel Airlock (PAL) Door Inoperable
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED MONTH DAY YEAR YEAR SEQUENTIAL REV MONTH DAY YEAR FACILITY NAME DOCUMENT NUMBER I
NUMBER NO.
09 17 2011 11 002 00 11 16 2011 FACILITY NAME DOCUMENTNUMBER 1
05000
- 9. OPERATING MODE
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR §: (Check all that apply)
E] 20.2201(b)
[] 20.2203(a)(3)(i)
E-50.73(a)(2)(i)(C)
[]
50.73(a)(2)(vii)
[1] 20.2201(d)
[]
20.2203(a)(3)(ii)
El 50.73(a)(2)(ii)(A)
E] 50.73(a)(2)(viii)(A)
El 20.2203(a)(1)
F] 20.2203(a)(4)
El 50.73(a)(2)(ii)(B)
[-] 50.73(a)(2)(viii)(B)
[-] 20.2203(a)(2)(i)
E]
50.3S(c)(1)(i)(A)
[]
50.73(a)(2)(iii)
[__
50.73(a)(2)(ix)(A)
- 10. POWER LEVEL
[]
20.2203(a)(2)(ii)
E]
50.36(c)(1)(ii)(A)
El 50.73(a)(2)(iv)(A)
[] 50.73(a)(2)(x)
E] 20.2203(a)(2)(iii)
[1 50.36(c)(2)
El 50.73(a)(2)(v)(A)
[]
73.71(a)(4) 100
[]
20.2203(a)(2)(iv)
[-] 50.46(a)(3)(ii)
[]
50.73(a)(2)(v)(B)
El 73.71(a)(5)
E] 20.2203(a)(2)(v)
[]
50.73(a)(2)(i)(A)
[E 50.73(a)(2)(v)(C)
[]
OTHER El 20.2203(a)(2)(vi)
[J 50.73(a)(2)(i)(B)
[J 50.73(a)(2)(v)(D)
VOLUNTARY LER
- 12. LICENSEE CONTACT FOR THIS LER FACILITY NAME TELEPHONE NUMBER (Include Area Code)
Timothy A. Hope, Nuclear Licensing Manager 254-897-6370CAUSE SYSTEM COMPONENT MANU-REPORTABLE
CAUSE
SYSTEM COMPONENT MANU-REPORTABLE FACTURER TO EPIX FACTURER TO EPIX
- 14. SUPPLEMENTAL REPORT EXPECTED
- 15. EXPECTED MONTH DAY YEAR SUBMISSION E
YES (If yes, complete 15. EXPECTED SUBMISSION DATE)
W NO DATE ABSTRACT (Limit to 1400 spaces, i.e., approximately 15 single-spaced typewritten lines)
On September 17, 2011, at 2330 hours0.027 days <br />0.647 hours <br />0.00385 weeks <br />8.86565e-4 months <br />, Operations personnel were unable to pressurize the Unit 1 Containment Personnel Airlock (PAL) during a routine performance of OPT-802A, "Appendix J Leak Rate Test of Personnel Air-lock Door Seals," which placed the PAL in an inoperable condition. Due to the time span, approximately 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />, since the Unit 1 PAL door had been operated and closed, a violation of Technical Specification LCO 3.6.2, "Containment Air Locks," occurred.
The cause of this event was a piece of tape inadvertently attached to the sealing surface of the inner PAL door that prevented proper door sealing. This was due to insufficient controls in place to ensure that the PAL seals remained free of foreign material during modes 1 through 4 containment entries.
Corrective actions included removal of the tape, satisfactory performance of OPT-802A, and procedure revisions to prevent recurrence.
All times are in Central Daylight Time, unless otherwise noted.
NRC FORM 366 (10-2010)
PRINTED ON RECYCLED PAPER (If more space is required, use additional copies of SUMMARY OF THE EVENT, INCLUDING DATES AND APPROXIMATE TIMES:
On September 16, at 0727 hours0.00841 days <br />0.202 hours <br />0.0012 weeks <br />2.766235e-4 months <br />, the Unit 1 Containment Personnel Airlock (PAL)
[EIIS: (NH)(AL)] was prepared for personnel entry for pre-outage work and personnel began entering the Unit 1 Containment at 0738 hours0.00854 days <br />0.205 hours <br />0.00122 weeks <br />2.80809e-4 months <br />. On September 16, 2011 at 1609 hours0.0186 days <br />0.447 hours <br />0.00266 weeks <br />6.122245e-4 months <br />, Security verified and notified the Unit 1 Control Room that all personnel had exited the Unit 1 Containment and the Unit 1 PAL was secured by Operations personnel (Utility, Licensed) at 1653 hours0.0191 days <br />0.459 hours <br />0.00273 weeks <br />6.289665e-4 months <br />.
On September 17, 2011, at 2330 hours0.027 days <br />0.647 hours <br />0.00385 weeks <br />8.86565e-4 months <br />, Comanche Peak Operations personnel (Utility, Licensed) were unable to pressurize the Unit I PAL during a routine performance of OPT-802A, "Appendix J Leak Rate Test of Personnel Air-lock Door Seals," which placed the PAL in an inoperable condition.
Upon investigation, a 10 inch piece of yellow and black tape was removed from the inner door sealing surface [EIIS: (NH)(AL)(DR)(SEAL)]. The tape had been used to demarcate a tripping hazard caused by the difference in height between the inner loading ramp and the PAL deck. The LCO was exited on September 18, 2011 at 0426 hours0.00493 days <br />0.118 hours <br />7.043651e-4 weeks <br />1.62093e-4 months <br /> upon a satisfactory re-performance of OPT-802A.
During the subsequent investigation of the event, CPNPP Engineering personnel determined that the PAL inner door was INOPERABLE for approximately 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> which violated the time requirements of Technical Specification LCO 3.6.2, "Containment Air Locks."
(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) (17)
VI. PREVIOUS SIMILAR EVENTS
There have been no previous similar reportable events in the last three years involving inoperable Containment Personnel Airlock doors.PRINTED ON RECYCLED PAPER