05000483/LER-2008-004, Failure to Maintain Containment Purge & Exhaust System in Service During Core Alts W/Equipment Hatch Open
| ML083540186 | |
| Person / Time | |
|---|---|
| Site: | Callaway  (NPF-030) |
| Issue date: | 12/12/2008 |
| From: | Graessle L AmerenUE, Union Electric Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| ULNRC-05572 LER 08-004-00 | |
| Download: ML083540186 (8) | |
| 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 |
| 4832008004R00 - NRC Website | |
text
AmerenUE P0 Box 620 Callaway Plant Fulton, MO 65251 December 12, 2008 ULNRC-05572 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Stop P1-137 Washington, DC 20555-0001 V Ameren 10 CFR 50.73(a)(2)(i)(B)
UF Ladies and Gentlemen:
DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT 1 UNION ELECTRIC CO.
FACILITY OPERATING LICENSE NPF-30 LICENSEE EVENT REPORT 2008-004-00 Failure to Maintain Containment Purge and Exhaust System In Service During Core Alterations With Equipment Hatch Open The enclosed licensee event report is submitted in accordance with 10CFR50.73(a)(2)(i)(B) to report an event in which the Containment Purge and Exhaust System was removed from service and core alterations were inadvertently allowed to recommence with the equipment hatch open prior to returning the Containment Purge and Exhaust System to service.
This letter does not contain new commitments.
Sincerely, u~ke H.iGraessle Director, Operations Support KRA/nls Enclosure a subsidiary of Ameren Corporation
ULNRC-05572 December 12, 2008 Page 2 cc:
Mr. Elmo E. Collins, Jr.
Regional Administrator U.S. Nuclear Regulatory Commission Region IV 612 E. Lamar Blvd., Suite 400 Arlington, TX 76011-4125 Senior Resident Inspector Callaway Resident Office U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman, MO 65077 Mr. Mohan C. Thadani (2 copies)
Licensing Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop O-8G14 Washington, DC 20555-2738
ULNRC-05572 December 12, 2008 Page 3 Index and send hardcopy to QA File A160.0761 Hardcopy:
Certrec Corporation 4200 South Hulen, Suite 422 Fort Worth, TX 76109 (Certrec receives ALL attachments as long as they are non-safeguards and may be publicly disclosed.)
LEREvents@inpo.org (must send the WORD version of the LER to this address)
Electronic distribution for the following can be made via LER ULNRC Distribution:
A. C. Heflin F. M. Diya D. W. Neterer T. E. Herrmann L. S. Sandbothe S. A. Maglio S. L. Gallagher L. M Belsky (NSRB)
T. B. Elwood D. E. Dumbacher (NRC)
B. A. Brook (WCNOC)
Ms. Diane M. Hooper (WCNOC)
Mr. Dennis Buschbaum (TXU)
Mr. Scott Bauer (Palo Verde)
Mr. Stan Ketelsen (PG&E)
Mr. Wayne Harrison (STPNOC)
Mr. John O'Neill (Pillsbury Winthrop Shaw Pittman LLP)
Missouri Public Service Commission Records Center (INPO)
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 06/30/2007 (6-2004)
, the NRC may digits/characters for each block) not conduct or sponsor, and a person is not required to respond to, Ihe information collection.
- 3. PAGE Callaway Plant Unit 1 05000483 1 OF 5
- 4. TITLE Failure to Maintain Containment Purge & Exhaust System In Service During Core Alts w/ Equipment Hatch Open
- 5. EVENT DATE
- 6. LER NUMBER__
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED MONTH DAY YEAR YEAR SEQUENTIAL REV MONTH DAY YEAR FACILITY NAME DOCKET NUMBER t
FACILITY NAME DOCKET NUMBER 10 17 2008 2008 004 00 12 12 2008
- 9. OPERATING MODE
- 11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply) 0l 20.2201(b)
[I 20.2203(a)(3)(i) 0l 50.73(a)(2)(i)(C)
-] 50.73(a)(2)(vii)
MODE 6 0l 20.2201(d)
-] 20.2203(a)(3)(ii)
[I 50.73(a)(2)(ii)(A) 0l 50.73(a)(2)(viii)(A)
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)
I]
50.36(c)(1)(i)(A)
[I 50.73(a)(2)(iii) 0l 50.73(a)(2)(ix)(A)
- 10. POWER LEVEL 0l 20.2203(a)(2)(ii) 0] 50.36(c)(1)(ii)(A) 0l 50.73(a)(2)(iv)(A)
[I 50.73(a)(2)(x) 0l 20.2203(a)(2)(iii) 0l 50.36(c)(2)
[I 50.73(a)(2)(v)(A)
[1 73.71 (a)(4) 0l 20.2203(a)(2)(iv) 0l 50.46(a)(3)(ii)
El 50.73(a)(2)(v)(B) 0l 73.71 (a)(5) 0%
0l 20.2203(a)(2)(v) 0l 50.73(a)(2)(i)(A) 0l 50.73(a)(2)(v)(C)
[I OTHER El 20.2203(a)(2)(vi) 0 50.73(a)(2)(i)(B)
El 50.73(a)(2)(v)(D)
Specify in Abstract below I
or in SUMMARY OF THE EVENT, INCLUDING DATES AND APPROXIMATE TIMES At 1812 on October 16, 2008 the containment equipment hatch was opened with the required administrative controls in place, and at 1720 on October 17, 2008 core offload commenced. Core alterations were subsequently suspended at 2111 on October 17, 2008 to investigate possible fuel assembly grid strap damage. Meanwhile, the containment shutdown purge exhaust fan [Energy Industry Identification System (EIIS) system: VA; component: FAN] was running. It was recognized, however, that it would be necessary to secure this fan in order to clean and inspect its associated 480V AC load center (PG20) [EIIS system: EC]. At 2209 on October 17, 2008, containment shutdown purge exhaust was secured so that the containment vent permit could be dosed out and a new permit opened to support operation of the containment mini-purge exhaust fan.
At 2331 on October 17, 2008, core off-load recommenced with the equipment hatch open. However, the containment purge and exhaust system was not in service. The mini-purge exhaust fan was then started at 0212 on October 18, 2008. Core alterations continued from 2331 on October 17, 2008 to 0212 October 18, 2008 (2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, 41 minutes) with the equipment hatch open and the containment purge and exhaust system not in service. On October 19, 2008 Operations, when planning restoration of the load center associated with the containment shutdown purge exhaust fan, determined that this condition was in violation of Callaway operating procedure OSP-SF-00003 (Rev. 018) step 6.3.4 and Technical Specification (T/S) 3.9.4.
Per Callaway T/S 3.9.4, "Containment Penetrations," the equipment hatch is allowed to be open during core alterations provided administrative controls are in effect. Per T/S Bases 3.9.4, one ofthe required administrative controls for this condition is for the containment purge and exhaust system to be in service. The purpose for requiring the containment purge and exhaust system to be in service while the equipment hatch is open with core alterations in progress is to ensure that, in the event of a fuel handling accident (FHA) inside containment, all post-accident releases are monitored.
As noted above, core alterations continued for two hours and forty-one minutes with the equipment hatch open and the containment purge and exhaust system secured. Thus, all administrative controls were not in place as required per T/S 3.9.4. Had a fuel handling accident (FHA) occurred, post-accident releases would not have been monitored via containment purge and exhaust system MDi-PnMA qAAA fi-ýnnii
(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)
V.
ADDITIONAL INFORMATION
The system and component codes listed below are from the IEEE Standard 805-1984 and IEEE Standard 803A-1983, respectively.
System:
VA, Reactor Building Environmental Control System EC, Low Voltage Power System Component:
FAN, Fan